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kottke.org posts about NASA

NASA Apollo Saturn V Lego set

posted by Jason Kottke   Jun 22, 2017

Apollo 11 Lego

Lego has introduced an Apollo Saturn V rocket set, complete with lunar lander and 3 astronaut minifigs.

Packed with authentic details, it features 3 removable rocket stages, including the S-IVB third stage with the lunar lander and lunar orbiter. The set also includes 3 stands to display the model horizontally, 3 new-for-June-2017 astronaut microfigures for role-play recreations of the Moon landings, plus a booklet about the manned Apollo missions and the fan designers of this educational and inspirational LEGO Ideas set.

Three rocket stages! And look at this lander:

Apollo 11 Lego

Amazing detail: the set contains 1969 pieces, which is the year that the Apollo 11 astronauts landed on the Moon. I typically leave the Lego building to my kids, but I might have to make an exception for this. (via mike)

The view from Mars

posted by Jason Kottke   Jun 21, 2017

Mars Opportunity 2017

NASA’s Opportunity rover started exploring the surface of Mars in January 2004. Its mission was supposed to last about 90 days, but over 13 years later, Opportunity is still rolling around the red planet, doing science and taking photos. Jason Major processed a few of Opportunity’s most recent snaps of the Endeavour Crater and they’re just wonderful. I’m especially taken with the one included above…it belongs in a museum!

NASA’s super accurate map of the 2017 eclipse

posted by Jason Kottke   Jun 14, 2017

Using data about the Moon’s terrain from the Lunar Reconnaissance Orbiter as well as elevation data on Earth, NASA’s Ernie Wright created a very accurate map of where and when the August 2017 eclipse will occur in the United States.

Standing at the edge of the moon’s shadow, or umbra, the difference between seeing a total eclipse and a partial eclipse comes down to elevation — mountains and valleys both on Earth and on the moon — which affect where the shadow lands. In this visualization, data from NASA’s Lunar Reconnaissance Orbiter account for the moon’s terrain that creates a jagged edge on its shadow. This data is then combined with elevation data on Earth as well as information on the sun angle to create the most accurate map of the eclipse path to date.

You can download maps of your area from NASA’s official eclipse website…I will be studying the Nebraska map closely.

Nebraska Eclipse Map

See also Eclipse Megamovie 2017, an eclipse simulator you can use to check what the eclipse will look like in the sky in your area, and what looks like an amazing eclipse watching festival put on by Atlas Obscura.

Vivid new images and flyby videos of Jupiter

posted by Jason Kottke   May 30, 2017

Jupiter South Pole Juno

NASA’s Juno spacecraft is currently orbiting around Jupiter and taking some of the best photos and scientific measurements we’ve seen of the solar system’s largest planet. The photo above is of Jupiter’s south pole, gathering point for massive cyclones.

Early science results from NASA’s Juno mission to Jupiter portray the largest planet in our solar system as a complex, gigantic, turbulent world, with Earth-sized polar cyclones, plunging storm systems that travel deep into the heart of the gas giant, and a mammoth, lumpy magnetic field that may indicate it was generated closer to the planet’s surface than previously thought.

“We are excited to share these early discoveries, which help us better understand what makes Jupiter so fascinating,” said Diane Brown, Juno program executive at NASA Headquarters in Washington. “It was a long trip to get to Jupiter, but these first results already demonstrate it was well worth the journey.”

Using data and photos from Juno, Gerald Eichstädt and Seán Doran have created these videos that approximate what it might look like flying by Jupiter in a spacecraft.

Wonderful.

Lunar, a short film about humankind’s journey to the Moon

posted by Jason Kottke   May 17, 2017

Using NASA still photographs and audio from the Apollo missions, Christian Stangl created this animated collage as a dedication “to all people who believe in peaceful expansion of our borders”.

In the year 1957 the cold war expands to space. The Soviet-Union sends Sputnik as the first manmade object into earth-orbit. 2 years later Yuri Gagarin enters space as the first man in space. The so called “Space Race” seems to be decided. But in 1961 President Kennedy promised to send American Astronauts to the moon. The Apollo Project was born. A space ship had to be built that is strong enough to escape earth’s gravitation, land on the moon and bring the crew safely back to earth.

I am a total sucker for everything Moon/Apollo related. To me, putting humans on the Moon is one of the best and most inspiring things we have ever done as a species, even though it’s the poster child for the right thing done for the wrong reason.

NASA’s new nighttime map of the entire Earth

posted by Jason Kottke   Apr 13, 2017

Night Map Earth 2017

Night Map Earth 2017

For the first time since 2012, NASA has released a new map of the entire Earth at night. Of course, you don’t see the Earth so much as the activity of humans in well-lit cities.

Today they are releasing a new global composite map of night lights as observed in 2016, as well as a revised version of the 2012 map. The NASA group has examined the different ways that light is radiated, scattered and reflected by land, atmospheric and ocean surfaces. The principal challenge in nighttime satellite imaging is accounting for the phases of the moon, which constantly varies the amount of light shining on Earth, though in predictable ways. Likewise, seasonal vegetation, clouds, aerosols, snow and ice cover, and even faint atmospheric emissions (such as airglow and auroras) change the way light is observed in different parts of the world. The new maps were produced with data from all months of each year. The team wrote code that picked the clearest night views each month, ultimately combining moonlight-free and moonlight-corrected data.

Scientists are planning on providing “daily, high-definition views of Earth at night” starting later this year. It’s worth clicking through to play with the interactive India map…it’s astounding to see how much light the country has added in the past 5 years. And see if you can spot North Korea at night:

Night Map Earth 2017 03

Barely…just a tiny dot for Pyongyang. You can play around with a fully zoomable version of the entire map here. (via @JamesJM)

A full rotation of the Moon

posted by Jason Kottke   Mar 31, 2017

All but a few humans have seen no more than half of the Moon with their own eyes. For the rest of us stuck on Earth, we only get to see the side that always faces the Earth because the Earth & Moon are tidally locked; the Moon’s rotation about its axis and its orbit around the Earth take the same amount of time. But NASA’s LRO probe has taken high-resolution photos of all but 2% of the Moon’s surface, which have been stitched together into this video of the Moon’s full 360-degree rotation.

NASA has found 7 Earth-like planets orbiting a single nearby star

posted by Jason Kottke   Feb 22, 2017

Trappist 1

Today NASA announced the discovery of seven planets “that could harbor life” around a dwarf star called Trappist-1.

The planets orbit a dwarf star named Trappist-1, about 40 light years, or about 235 trillion miles, from Earth. That is quite close, and by happy accident, the orientation of the orbits of the seven planets allows them to be studied in great detail.

One or more of the exoplanets - planets around stars other than the sun - in this new system could be at the right temperature to be awash in oceans of water, astronomers said, based on the distance of the planets from the dwarf star.

“This is the first time so many planets of this kind are found around the same star,” said Michael Gillon, an astronomer at the University of Liege in Belgium and the leader of an international team that has been observing Trappist-1.

Here’s the paper published in Nature.

Hidden Figures

posted by Jason Kottke   Feb 14, 2017

I finally got the chance to see Hidden Figures the other day. Recommended. It’s a science/space story in the vein of Apollo 13, but the twin engines of the film are the three excellent lead actresses — Taraji P. Henson, Octavia Spencer & Janelle Monáe — and the persistent portrayal of the systemic biases of segregation and sexism. You watch this movie and think, how much higher could the human race have flown if women and people of color had always had the same opportunities as white men?1 How many Katherine Johnsons never got the chance to develop and use their skills in math, science, or technology because of their skin color or gender? Our society wastes so much energy and human lives telling people what they can’t do rather than empowering them to show everyone what they can do.

Hidden Figures was adopted from Margot Lee Shetterly’s book of the same name. The film takes some dramatic license with the timing of certain events but overall is historically accurate.

The film primarily focuses on John Glenn’s 1962 trip around the globe and does add dramatic flourishes that are, well, Hollywood. However, most of the events in the movie are historically accurate. Johnson’s main job in the lead-up and during the mission was to double-check and reverse engineer the newly-installed IBM 7090s trajectory calculations. As it shows, there were very tense moments during the flight that forced the mission to end earlier than expected. And John Glenn did request that Johnson specifically check and confirm trajectories and entry points that the IBM spat out (albeit, perhaps, not at the exact moment that the movie depicts). As Shetterly wrote in her book and explained in a September NPR interview, Glenn did not completely trust the computer. So, he asked the head engineers to “get the girl to check the numbers… If she says the numbers are good… I’m ready to go.”

You can view Johnson’s published reports on NASA’s site, including her initial technical report from 1960 on the Determination of Azimuth Angle at Burnout for Placing a Satellite Over a Selected Earth Position.

  1. I’m using the past tense here, but I am definitely not saying that women and people of color now possess those same opportunities. Take a quick look at the current racial and gender wage gaps in the US and you’ll see that they still do not.

NASA’s analysis of seemingly impossible engine: it works

posted by Jason Kottke   Nov 21, 2016

EM Drive NASA

NASA has published their highly anticipated and peer-reviewed analysis of the EM Drive and they’ve concluded the engine works despite appearing to violate Newton’s third law of motion.

In case you’ve missed the hype, the EM Drive, or Electromagnetic Drive, is a propulsion system first proposed by British inventor Roger Shawyer back in 1999.

Instead of using heavy, inefficient rocket fuel, it bounces microwaves back and forth inside a cone-shaped metal cavity to generate thrust.

According to Shawyer’s calculations, the EM Drive could be so efficient that it could power us to Mars in just 70 days.

But, there’s a not-small problem with the system. It defies Newton’s third law, which states that everything must have an equal and opposite reaction.

According to the law, for a system to produce thrust, it has to push something out the other way. The EM Drive doesn’t do this.

Yet in test after test it continues to work. Last year, NASA’s Eagleworks Laboratory team got their hands on an EM Drive to try to figure out once and for all what was going on.

There’s a lot of skepticism around this project, but NASA’s review is definitely a boost to the EM Drive’s credibility.

Update: Just to reiterate, even with this latest paper, there is still skepticism about the EM Drive.

In the end, we can’t conclude that this is a null result, nor can we excitedly say that it works. The sad truth is that this paper is not much better than the researchers’ last one, and it doesn’t actually have enough detail to let us fully evaluate the data. Nor does the paper have enough data to allow a conclusion in the absence of a model. And despite mention of a model in the paper, any model that exists is very well hidden.

Also a clue that the science isn’t quite there on this one yet: very few mainstream science outlets covered this. When the NY Times picks this up and gets prominent physicists on the record about the thruster’s promise, that’s when you’ll know something’s up. Until then, remain skeptical. (via @paudo)

The last steps on the Moon

posted by Jason Kottke   Nov 18, 2016

In May of 1961, President John F. Kennedy told Congress and the rest of the American public that the US was going to send a man to the Moon. Just over 11 years later, as part of the Apollo 17 mission in December 1972, humans set foot on the Moon for the last time.1 The Last Steps is a summary of that final mission, during which NASA accomplished the near-impossible yet again and was met with increasing public indifference about a journey that had taken on the ease of a car trip to grandma’s house.

Update: Perhaps humans will set foot on the Moon sooner than 2060. The European Space Agency is planning on a manned mission “by 2030” and China is shooting for 2036. (via @T_fabriek)

  1. For now, I guess I should add. It’s been 44 years since then and at the rate things are going, it might be another 44 years before it happens again. I’m hoping for a reboot of the Apollo franchise sooner rather than later, though.

Gorgeous ultra HD fly-through of the inside of the International Space Station

posted by Jason Kottke   Oct 28, 2016

NASA has uploaded a beautiful and relaxing 18-minute fly-through video of the International Space Station filmed in ultra high-definition 4K resolution. They used to a fisheye lens to film it, which means you get plenty of detail and depth of field.

Gorgeous photos of NASA’s rockets and robots

posted by Jason Kottke   Oct 11, 2016

Redgrove NASA

Redgrove NASA

Wired took an exclusive tour of NASA’s rockets and robots with photographer Benedict Redgrove and the photographic results are — sorry! — out of this world. Best viewed on Redgrove’s site, who must be — still sorry!! — over the moon about how they turned out. But seriously, that DARPA centaur-on-wheels robot…how cool is that?

Also, you may remember Redgrove from his short film on how tennis balls are made. How that for service? (Stop. Just stop it. (You love it. (STOP!)))

The 40th Anniversary Edition of the Voyager Golden Record

posted by Jason Kottke   Sep 22, 2016

Just launched on Kickstarter: a gorgeous reproduction of the Golden Record that was included on the Voyager space probes when we shot them into space almost 40 years ago. The records contained images and sounds from Earth that some extraterrestrial civilization may someday view and listen to.

The Voyager Golden Record contains the story of Earth expressed in sounds, images, and science: Earth’s greatest music from myriad cultures and eras, from Bach and Beethoven to Blind Willie Johnson and Chuck Berry, Senegalese percussion to Solomon Island panpipes. Dozens of natural sounds of our planet — birds, a train, a baby’s cry — are collaged into a lovely sound poem. There are spoken greetings in 55 human languages, and one whale language, and more than one hundred images encoded in analog that depict who, and what, we are.

This is so cool. When I was doing the packages with Quarterly, one of the ideas I had on my list was to replicate the Golden Record. The production values would have been a lot more limited than this effort and the rights issue is ultimately why I never pursued it:

The overwhelming majority of the funds raised from this historic reissue will go directly to the high production costs, licensing, and royalties incurred in creating this lavish box set.

See also the Contents of the Voyager Golden Record and The sounds of Voyager’s Golden Record.

A year-long time lapse of the Earth rotating in space

posted by Jason Kottke   Jul 22, 2016

NASA recently released a time lapse video of the Earth constructed from over 3000 still photographs taken over the course of a year. The photos were taken by a camera mounted on the NOAA’s DSCOVR satellite, which is perched above the Earth at Lagrange point 1.

Wait, have we talked about Lagrange points yet? Lagrange points are positions in space where the gravity of the Sun and the Earth (or between any two large things) cancel each other out. The Sun and the Earth pull equally on objects at these five points.

L1 is about a million miles from Earth directly between the Sun and Earth and anything that is placed there will hover there relative to the Earth forever (course adjustments for complicated reasons aside). It is the perfect spot for a weather satellite with a cool camera to hang out, taking photos of a never-dark Earth. In addition to DSCOVR, at least five other spacecraft have been positioned at L1.

L2 is about a million miles from the Earth directly opposite L1. The Earth always looks dark from there and it’s mostly shielded from solar radiation. Five spacecraft have lived at L2 and several more are planned, including the sequel to the Hubble Space Telescope. Turns out that the shadow of the Earth is a good place to put a telescope.

L3 is opposite the Earth from the Sun, the 6 o’clock to the Earth’s high noon. This point is less stable than the other points because the Earth’s gravitational influence is very small and other bodies (like Venus) periodically pass near enough to yank whatever’s there out, like George Clooney strolling through a country club dining room during date night.

And quoting Wikipedia, “the L4 and L5 points lie at the third corners of the two equilateral triangles in the plane of orbit whose common base is the line between the centers of the [Earth and Sun]”. No spacecraft have ever visited these points, but they are home to some interplanetary dust and asteroid 2010 TK7, which orbits around L4. Cool! (via slate)

NASA extends the missions of nine spacecraft

posted by Jason Kottke   Jul 05, 2016

While we’re on the subject, NASA announced late last week that they are extending the missions of nine spacecraft sprinkled about the solar system. Included are the New Horizon probe, which will wing off to study an object in the Kuiper Belt after doing so well with Pluto and the rover Opportunity, which was slated for a mission lasting just over 90 days but has now spent more than 12 years exploring the surface of Mars.

The Dawn mission to Ceres is another spacecraft whose duration has been extended, beating long odds. Part of the spacecraft’s functionality had not been working for some time, but was recently repaired.

It was a bit unexpected because Dawn is low on fuel. “Less than a year ago, I would have thought it was ridiculous that the spacecraft would even be operating at this point,” said Marc D. Rayman, the chief engineer for the Dawn mission.

The Dawn spacecraft was designed to use four spinning wheels to pivot in different directions. But at its previous destination, the asteroid Vesta, two of the four wheels overheated and failed. At Ceres, the wheels stayed off, and the spacecraft used its thrusters instead to pivot.

In December, Dawn reached its lowest orbit, just 240 miles above Ceres. Dr. Rayman said he and his team had expected Dawn to exhaust its remaining propellant by March.

But they spun up the wheels again. That succeeded, cutting the use of the thrusters. “It all worked out beautifully,” Dr. Rayman said. That left enough fuel to contemplate doing something more.

Juno successfully enters orbit around Jupiter

posted by Jason Kottke   Jul 05, 2016

After a voyage from Earth lasting almost 5 years, the Juno spacecraft successfully entered Jupiter’s orbit late last night.

The engine burn was tense. 35 minutes is a long time for a spacecraft burn; after 20 minutes it had slowed Juno enough to be in orbit, but not the correct one. It had to continue for another 15 minutes to put the spacecraft on the correct orbit. It worked essentially perfectly. The burn time was off by just one second. That will have no real effect on the orbit.

The 35-minute burn slowed Juno down by more than 1200 mph.

NASA’s Juno mission to Jupiter

posted by Jason Kottke   Jun 28, 2016

Launched from Earth in August 2011, the Juno probe is due to arrive at Jupiter on July 4, 2016. Once there, it will circle Jupiter 37 times, observing its atmosphere and magnetic fields, before plunging into the giant planet so as not to contaminate Europa with microbes.

Juno’s principal goal is to understand the origin and evolution of Jupiter. Underneath its dense cloud cover, Jupiter safeguards secrets to the fundamental processes and conditions that governed our solar system during its formation. As our primary example of a giant planet, Jupiter can also provide critical knowledge for understanding the planetary systems being discovered around other stars.

With its suite of science instruments, Juno will investigate the existence of a solid planetary core, map Jupiter’s intense magnetic field, measure the amount of water and ammonia in the deep atmosphere, and observe the planet’s auroras.

Juno will let us take a giant step forward in our understanding of how giant planets form and the role these titans played in putting together the rest of the solar system.

Science is great. That video? Maybe not so much.

Epic time lapse videos of Mercury’s transit of the Sun

posted by Jason Kottke   May 10, 2016

About 13 times per century, the planets align in the heavens and the Earth can watch Mercury crossing the face of the Sun. NASA’s Solar Dynamics Observatory was watching too and captured time lapse videos from several angles using various instruments measuring magnetism, visible light, and UV. The cosmic ballet goes on.

See also more from the SDO: a gorgeous time lapse of the Sun, a three-year video portrait of the Sun, and Thermonuclear Art.

How many digits of pi does NASA use?

posted by Jason Kottke   Mar 18, 2016

Mathematicians have calculated pi out to more than 13 trillion decimal places, a calculation that took 208 days. NASA’s Marc Rayman explains that in order to send out probes and slingshot them accurately throughout the solar system, NASA needs to use only 15 decimal places, or 3.141592653589793. How precise are calculations with that number? This precise:

The most distant spacecraft from Earth is Voyager 1. It is about 12.5 billion miles away. Let’s say we have a circle with a radius of exactly that size (or 25 billion miles in diameter) and we want to calculate the circumference, which is pi times the radius times 2. Using pi rounded to the 15th decimal, as I gave above, that comes out to a little more than 78 billion miles. We don’t need to be concerned here with exactly what the value is (you can multiply it out if you like) but rather what the error in the value is by not using more digits of pi. In other words, by cutting pi off at the 15th decimal point, we would calculate a circumference for that circle that is very slightly off. It turns out that our calculated circumference of the 25 billion mile diameter circle would be wrong by 1.5 inches. Think about that. We have a circle more than 78 billion miles around, and our calculation of that distance would be off by perhaps less than the length of your little finger.

When was humanity’s calculation of pi accurate enough for NASA? In 1424, Persian astronomer and mathematician Jamshid al-Kashi calculated pi to 17 digits.

Photos from a year in space

posted by Jason Kottke   Mar 01, 2016

Scott Kelly

Scott Kelly

Scott Kelly

After nearly a year in space, astronaut Scott Kelly and cosmonaut Mikhail Kornienko will return from the ISS to Earth. During his stay in space, Kelly took hundreds of photographs and posted them to his Twitter account. You can view all the photos here or a selection of the best ones chosen by In Focus’ Alan Taylor.

On the 30th anniversary of the Space Shuttle Challenger disaster

posted by Jason Kottke   Jan 28, 2016

Today is the 30th anniversary of the final launch and subsequent catastrophic loss of the Space Shuttle Challenger. Popular Mechanics has an oral history of the launch and aftermath.

Capano: We got the kids quiet, and then I remember that the line that came across the TV was “The vehicle has exploded.” One of the girls in my classroom said, “Ms. Olson [Capano’s maiden name], what do they mean by ‘the vehicle’?” And I looked at her and I said, “I think they mean the shuttle.” And she got very upset with me. She said, “No! No! No! They don’t mean the shuttle! They don’t mean the shuttle!”

Raymond: The principal came over the PA system and said something like, “We respectfully request that the media leave the building now. Now.” Some of the press left, but some of them took off into the school. They started running into the halls to get pictures, to get sound-people were crying, people were running. It was chaos. Some students started chasing after journalists to physically get them out of the school.

I have certainly read about Feynman’s O-ring demonstration during the investigation of the disaster, but I hadn’t heard this bit:

Kutyna: On STS-51C, which flew a year before, it was 53 degrees [at launch, then the coldest temperature recorded during a shuttle launch] and they completely burned through the first O-ring and charred the second one. One day [early in the investigation] Sally Ride and I were walking together. She was on my right side and was looking straight ahead. She opened up her notebook and with her left hand, still looking straight ahead, gave me a piece of paper. Didn’t say a single word. I look at the piece of paper. It’s a NASA document. It’s got two columns on it. The first column is temperature, the second column is resiliency of O-rings as a function of temperature. It shows that they get stiff when it gets cold. Sally and I were really good buddies. She figured she could trust me to give me that piece of paper and not implicate her or the people at NASA who gave it to her, because they could all get fired.

I wondered how I could introduce this information Sally had given me. So I had Feynman at my house for dinner. I have a 1973 Opel GT, a really cute car. We went out to the garage, and I’m bragging about the car, but he could care less about cars. I had taken the carburetor out. And Feynman said, “What’s this?” And I said, “Oh, just a carburetor. I’m cleaning it.” Then I said, “Professor, these carburetors have O-rings in them. And when it gets cold, they leak. Do you suppose that has anything to do with our situation?” He did not say a word. We finished the night, and the next Tuesday, at the first public meeting, is when he did his O-ring demonstration.

We were sitting in three rows, and there was a section of the shuttle joint, about an inch across, that showed the tang and clevis [the two parts of the joint meant to be sealed by the O-ring]. We passed this section around from person to person. It hit our row and I gave it to Feynman, expecting him to pass it on. But he put it down. He pulled out pliers and a screwdriver and pulled out the section of O-ring from this joint. He put a C-clamp on it and put it in his glass of ice water. So now I know what he’s going to do. It sat there for a while, and now the discussion had moved on from technical stuff into financial things. I saw Feynman’s arm going out to press the button on his microphone. I grabbed his arm and said, “Not now.” Pretty soon his arm started going out again, and I said, “Not now!” We got to a point where it was starting to get technical again, and I said, “Now.” He pushed the button and started the demonstration. He took the C-clamp off and showed the thing does not bounce back when it’s cold. And he said the now-famous words, “I believe that has some significance for our problem.” That night it was all over television and the next morning in the Washington Post and New York Times. The experiment was fantastic-the American public had short attention spans and they didn’t understand technology, but they could understand a simple thing like rubber getting hard.

I never talked with Sally about it later. We both knew what had happened and why it had happened, but we never discussed it. I kept it a secret that she had given me that piece of paper until she died [in 2012].

Whoa, dang. Also not well known is that the astronauts survived the initial explosion and were possibly alive and conscious when they hit the water two and a half minutes later.

Over the December holiday, I read 10:04 by Ben Lerner (quickly, recommended). The novel includes a section on the Challenger disaster and how very few people saw it live:

The thing is, almost nobody saw it live: 1986 was early in the history of cable news, and although CNN carried the launch live, not that many of us just happened to be watching CNN in the middle of a workday, a school day. All other major broadcast stations had cut away before the disaster. They all came back quickly with taped replays, of course. Because of the Teacher in Space Project, NASA had arranged a satellite broadcast of the mission into television sets in many schools — and that’s how I remember seeing it, as does my older brother. I remember tears in Mrs. Greiner’s eyes and the students’ initial incomprehension, some awkward laughter. But neither of us did see it: Randolph Elementary School in Topeka wasn’t part of that broadcast. So unless you were watching CNN or were in one of the special classrooms, you didn’t witness it in the present tense.

Oh, the malleability of memory. I remember seeing it live too, at school. My 7th grade English teacher permanently had a TV in her room and because of the schoolteacher angle of the mission, she had arranged for us to watch the launch, right at the end of class. I remember going to my next class and, as I was the first student to arrive, telling the teacher about the accident. She looked at me in disbelief and then with horror as she realized I was not the sort of kid who made terrible stuff like that up. I don’t remember the rest of the day and now I’m doubting if it happened that way at all. Only our classroom and a couple others watched it live — there wasn’t a specially arranged whole-school event — and I doubt my small school had a satellite dish to receive the special broadcast anyway. Nor would we have had cable to get CNN…I’m not even sure cable TV was available in our rural WI town at that point. So…?

But, I do remember the jokes. The really super offensive jokes. The jokes actually happened. Again, from 10:04:

I want to mention another way information circulated through the country in 1986 around the Challenger disaster, and I think those of you who are more or less my age will know what I’m talking about: jokes. My brother, who is three and a half years older than I, would tell me one after another as we walked to and from Randolph Elementary that winter: Did you know that Christa McAuliffe was blue-eyed? One blew left and one blew right; What were Christa McAuliffe’s last words to her husband? You feed the kids — I’ll feed the fish; What does NASA stand for? Need Another Seven Astronauts; How do they know what shampoo Christa McAuliffe used? They found her head and shoulders. And so on: the jokes seemed to come out of nowhere, or to come from everywhere at once; like cicadas emerging from underground, they were ubiquitous for a couple of months, then disappeared. Folklorists who study what they call ‘joke cycles’ track how — particularly in times of collective anxiety — certain humorous templates get recycled, often among children.

At the time, I remember these jokes being hilarious1 but also a little horrifying. Lerner continues:

The anonymous jokes we were told and retold were our way of dealing with the remainder of the trauma that the elegy cycle initiated by Reagan-Noonan-Magee-Hicks-Dunn-C.A.F.B. (and who knows who else) couldn’t fully integrate into our lives.

Reminds me of how children in Nazi ghettos and concentration camps dealt with their situation by playing inappropriate games.

Even in the extermination camps, the children who were still healthy enough to move around played. In one camp they played a game called “tickling the corpse.” At Auschwitz-Birkenau they dared one another to touch the electric fence. They played “gas chamber,” a game in which they threw rocks into a pit and screamed the sounds of people dying.

  1. Also, does anyone remember the dead baby jokes? They were all the rage when I was a kid. There were books of them. “Q: What do you call a dead baby with no arms and no legs laying on a beach? A: Sandy.” And we thought they were funny as hell.

Two Saturnian moons, lined up

posted by Jason Kottke   Jan 06, 2016

Saturn Two Moons

The Cassini spacecraft took a photo of two moons of Saturn, Tethys and Enceladus, beautifully aligned with each other. The cosmic ballet goes on. (via slate)

Best views yet of Pluto

posted by Jason Kottke   Dec 07, 2015

Pluto New Horizons Closest

NASA’s New Horizons probe has sent back the first of the sharpest images of Pluto it took during its July flyby of the planet.1

These latest images form a strip 50 miles (80 kilometers) wide on a world 3 billion miles away. The pictures trend from Pluto’s jagged horizon about 500 miles (800 kilometers) northwest of the informally named Sputnik Planum, across the al-Idrisi mountains, over the shoreline of Sputnik, and across its icy plains.

View the new image at high resolution here or watch a video scroll of the imagery:

  1. Oh yes, I went there. Bring it, NDT.

11 years of Saturn photos from the Cassini probe

posted by Jason Kottke   Nov 20, 2015

The Cassini probe, launched from Earth in 1997 (six months before I started publishing kottke.org), has been taking photos of Saturn and its moons for 11 years now. The Wall Street Journal has a great feature that shows exactly what the probe has been looking at all that time. (Note: the video above features flashing images, so beware if that sort of thing is harmful to you.)

The Breathing Earth

posted by Jason Kottke   Nov 18, 2015

From NASA, an animation of the yearly cycle of the Earth’s plant life. The data is taken from satellite measurements (plant density for land and chlorophyll concentration for the ocean) and averaged over several years.

From December to February, during the northern hemisphere winter, plant life in the higher latitudes is minimal and receives little sunlight. However, even in the mid latitudes plants are dormant, shown here with browns and yellows on the land and dark blues in the ocean. By contrast the southern ocean and land masses are at the height of the summer season and plant life is revealed with dark green colors on the land and in the ocean. As the year progresses, the situations reverses, with plant life following the increased sunlight northward, while the southern hemisphere experiences decreased plant activity during its winter.

If you’re anything like me, about 2-3 times into the video’s cycle, you’ll be breathing in tune to the Earth. Oxygen in, carbon dioxide out. Carbon dioxide in, oxygen out. Oxygen in, carbon dioxide out… (via @EricHolthaus)

Thermonuclear Art

posted by Jason Kottke   Nov 03, 2015

In a nod to our nation’s recreational drug users, NASA has created this 30-minute ultra high-resolution look at our Sun, assembled from thousands of photographs taken by the Solar Dynamics Observatory, which snaps a 16-megapixel image of the Sun every few seconds. Duuuuuuuude…

Cassini sippin’ on Enceladus

posted by Jason Kottke   Oct 28, 2015

Whoa, how have I not heard about this before today: the Cassini spacecraft is going to dive through a jet of water erupting from Enceladus, a Saturnian moon.

Discovering life was not on the agenda when Cassini was designed and launched two decades ago. Its instruments can’t capture microbes or detect life, but in a couple of dozen passes through the plumes of Enceladus, it has detected various molecules associated with life: water vapor, carbon dioxide, methane, molecular nitrogen, propane, acetylene, formaldehyde and traces of ammonia.

Wednesday’s dive will be the deepest Cassini will make through the plumes, only 30 miles above the icy surface. Scientists are especially interested in measuring the amount of hydrogen gas in the plume, which would tell them how much energy and heat are being generated by chemical reactions in hydrothermal vents at the bottom of the moon’s ocean.

That’s pretty crazy…it sounds like science fiction. NASA is doing a wonderful job producing great science with the lean budgets they are given.

NASA: there’s liquid water on the surface of Mars

posted by Jason Kottke   Sep 28, 2015

Mars

NASA’s press conference doesn’t start for a few minutes yet, but the NY Times has the scoop: NASA has found “definitive signs” of liquid water on the surface of Mars. Like, right now on Mars, not millions of years ago.

In a paper published in the journal Nature Geoscience, Dr. McEwen and other scientists identified waterlogged molecules — salts of a type known as perchlorates - in readings from orbit.

“That’s a direct detection of water in the form of hydration of salts,” Dr. McEwen said. “There pretty much has to have been liquid water recently present to produce the hydrated salt.”

By “recently,” Dr. McEwen said he meant “days, something of that order.”

This is fantastic timing for the release of The Martian movie, which comes out this weekend.

Update: And here’s the official press release from NASA.

“Our quest on Mars has been to ‘follow the water,’ in our search for life in the universe, and now we have convincing science that validates what we’ve long suspected,” said John Grunsfeld, astronaut and associate administrator of NASA’s Science Mission Directorate in Washington. “This is a significant development, as it appears to confirm that water — albeit briny — is flowing today on the surface of Mars.”

These downhill flows, known as recurring slope lineae (RSL), often have been described as possibly related to liquid water. The new findings of hydrated salts on the slopes point to what that relationship may be to these dark features. The hydrated salts would lower the freezing point of a liquid brine, just as salt on roads here on Earth causes ice and snow to melt more rapidly. Scientists say it’s likely a shallow subsurface flow, with enough water wicking to the surface to explain the darkening.

Sunset on Pluto

posted by Jason Kottke   Sep 17, 2015

The backlit photos of Pluto just posted by NASA are breathtaking. Look at this:

Pluto backlit

Just 15 minutes after its closest approach to Pluto on July 14, 2015, NASA’s New Horizons spacecraft looked back toward the sun and captured this near-sunset view of the rugged, icy mountains and flat ice plains extending to Pluto’s horizon. The smooth expanse of the informally named Sputnik Planum (right) is flanked to the west (left) by rugged mountains up to 11,000 feet (3,500 meters) high, including the informally named Norgay Montes in the foreground and Hillary Montes on the skyline. The backlighting highlights more than a dozen layers of haze in Pluto’s tenuous but distended atmosphere. The image was taken from a distance of 11,000 miles (18,000 kilometers) to Pluto; the scene is 230 miles (380 kilometers) across.

As they say, best viewed large. Some of those features don’t look like mountains at all, but like reptile scales or huge shards of ice pushed up into the sky. Fantastic.