In the last installment of a video series called The Universe in Verse, Maria Popova, Yo-Yo Ma, and Kelli Anderson have collaborated on a video that features words spoken by Nobel Prize-winning physicist Richard Feynman in a 1955 speech, a poem of sorts on the wonder of life.
Deep in the sea, all molecules repeat the patterns of one another till complex new ones are formed. They make others like themselves… and a new dance starts.
Growing in size and complexity… living things, masses of atoms, DNA, protein… dancing a pattern ever more intricate.
Out of the cradle onto the dry land… here it is standing… atoms with consciousness… matter with curiosity.
Lovely. And of course I love the visuals by Kelli Anderson.
You may have noticed, while twisting apart Oreos (aka the world’s favorite “trilayer laminate composite”) to get at the creme inside, that the creme tends to mostly stick to one half of the cookie. MIT graudate student Crystal Owens decided to study this phenomenon and has co-authored a paper about the failure mechanics of the Oreo’s layer of creme in the journal Physics of Fluid. From Ars Technica:
“I had in my mind that if you twist the Oreos perfectly, you should split the creme perfectly in the middle,” said Owens. “But what actually happens is the creme almost always comes off of one side.” The experiments showed that this creme distribution is not affected by rotation rate, the amount of creme filling, or the flavor. Rather, the pre-existing level of adhesion between the creme and the chocolate wafers seemed to be the determining factor. Cookies from the package within any one box typically separated with the same preferred orientation most of the time. This suggests that it has something to do with how the cookies are manufactured and then oriented during packaging, as well as how they are stored.
They even built a 3D printed “oreometer” so that people can study this phenomenon without using an expensive rheometer.
As a very amateur kitchen scientist myself, the Oreo situation reminds me of what happens when you try to tear three connected pieces of paper towel apart in one move by pulling on the outside pieces in opposite directions: the middle piece of paper towel almost always ends up attached to one of the outside pieces. In fact, in extensive testing over the past 3-4 years, this maneuver has only separated all three pieces a few times.1 (thx, eric)
There’s always a lot of hootin’ and hollerin’ and victory laps around the kitchen when a perfect pull happens. It’s a rare event!↩
Wow, NASA just released a video shot by the Mars Perseverance rover of a solar eclipse by the moon Phobos. The video description calls it “the most zoomed-in, highest frame-rate observation of a Phobos solar eclipse ever taken from the Martian surface”. According to this article from JPL, the video of the eclipse is played in realtime; it only lasted about 40 seconds.
Captured with Perseverance’s next-generation Mastcam-Z camera on April 2, the 397th Martian day, or sol, of the mission, the eclipse lasted a little over 40 seconds — much shorter than a typical solar eclipse involving Earth’s Moon. (Phobos is about 157 times smaller than Earth’s Moon. Mars’ other moon, Deimos, is even smaller.)
Just a hunk of space rock passing in front of a massive burning ball of gas recorded by a robot from the surface of an extraterrestrial planet, no big deal.
I had always heard that the engineering of Roman aqueducts was impressive, but as this video demonstrates, I didn’t know the half of it. The stuff about how precise the descending slope of the aqueducts were over several hundred miles is just incredible. (via open culture)
Is there a physical limit to how loud a noise can be? As you might imagine, the answer is somewhat complicated, even if you assume normal atmospheric conditions. In video, Benn Jordan discusses a few possible answers, as well as how we should think about the question in the first place. One possible answer is 194 decibels, although experiencing a sound that loud would probably kill you.
See also The World’s Loudest Sound, aka the sound generated by the Krakatoa volcanic eruption in 1883, which Jordan mentions in the video.
A new video from Kurzgesagt is designed to provide a little hope that humans can figure a way out of the climate crisis, without being overly pollyannish.
And so for many the future looks grim and hopeless. Young people feel particularly anxious and depressed. Instead of looking ahead to a lifetime of opportunity they wonder if they will even have a future or if they should bring kids into this world. It’s an age of doom and hopelessness and giving up seems the only sensible thing to do.
But that’s not true. You are not doomed. Humanity is not doomed.
There’s been progress in the last decade, in terms of economics, technology, policy, and social mores. It’s not happening fast enough to limit warming to 1.5°C, but if progress continues, gains accumulate, people keep pushing, and politicians start to figure out where the momentum is heading, we can get things under control before there’s a global apocalypse.
The high-resolution telescope of EUI takes pictures of such high spatial resolution that, at that close distance, a mosaic of 25 individual images is needed to cover the entire Sun. Taken one after the other, the full image was captured over a period of more than four hours because each tile takes about 10 minutes, including the time for the spacecraft to point from one segment to the next.
In total, the final image contains more than 83 million pixels in a 9148 x 9112 pixel grid. For comparison, this image has a resolution that is ten times better than what a 4K TV screen can display.
Using Lego bricks, a Raspberry Pi mini-computer, an Arduino microcontroller, some off-the-shelf components like lenses, and 3D-printed components, IBM scientist Yuksel Temiz built a fully functional microscope to help him with his work. The materials cost around $300 and the microscope performs as well as scopes many times more expensive — the images above were taken with the Lego scope.
The microscope works so well that for the past two years Temiz and his colleagues in the microfluidics lab at IBM Research, just meters away from the picturesque Zurich lake, have been using the images they took with it in their papers, published in leading journals. They also use them for presentations at major conferences. Not all images relate to microfluidics — the area of science that involves manipulating fluids on miniscule chips in a very precise manner. The liquids can be blood or urine, used for cancer and infectious diseases research as well as understanding heart attack conditions, and more. Researchers also routinely take images of typical computer chips, and Temiz showed me, for instance, how to take a stunning close up of a fruit fly.
Here’s a quick video look at how to build your own:
For his music video for Sébastien Guérive’s Bellatrix, Thomas Blanchard filmed ice crystals forming at close range and ultra-high resolution.
Bellatrix Sébastien Guérive music video is an experimental film on the crystallization of ice stars. It is a chemical saturation in hot water which is then cooled. The chemical saturation becomes very unstable when the liquid cools. The slightest disturbance in the liquid activates crystallization.
I spent hours and hours as a kid watching snowflakes accumulate on windowsills, raindrops rolling down windows, clouds rolling in from the west, and frost advance on surfaces, looking for patterns in the seeming randomness, so this is right up my alley. (via colossal)
The Earth is some 4.5 billion years old and the first life on Earth appeared 3.7 billion years ago (if not earlier). That’s a lot of time…so maybe it’s possible that a civilization existed at some point during that time and then vanished without a trace. In this video, Kurzgesagt explores the Silurian hypothesis.
When we think about alien civilizations we tend to look into the vastness of space, to far away planets. But there is another incredibly vast dimension that we might be giving too little thought to: time.
Could it be that over the last hundreds of millions of years, other civilizations existed on earth? Indigenous technological species that rose and died out? And that they or their artifacts are buried beneath our feet? What does science have to say about this and what are the implications for us?
Sometimes the sky above powerful thunderstorms can light up in massive displays of color; they’re called transient luminous events. Whoa, I’ve never seen or heard of this phenomenon before!
On rare nights with clear visibility over powerful distant thunderstorms, you might be able to see and capture red sprites. Sprites are large scale electrical discharges occurring high above thunderstorms in the upper atmosphere. They are massive events, sometimes 50 kilometers tall by 50 kilometers wide. Sprites belong to a mysterious and colorful group of phenomenon called Transient Luminous Events, or TLEs. Other TLE’s include halos, Elves, trolls, secondary jets, Blue starters, Blue jets and the magnificent gigantic jets. But what exactly are these transient luminous Events, and how do they form?
This video is a great explainer about the phenomenon — how it arises, where the colors come from, etc. (via the kid should see this)
Historically, contracting the measles has been linked to subsequent illness (and possibly death) from other causes. In the past few years, scientists have discovered why this is: measles causes “immune amnesia”.
Enter “immune amnesia”, a mysterious phenomenon that’s been with us for millennia, though it was only discovered in 2012. Essentially, when you’re infected with measles, your immune system abruptly forgets every pathogen it’s ever encountered before — every cold, every bout of flu, every exposure to bacteria or viruses in the environment, every vaccination. The loss is near-total and permanent. Once the measles infection is over, current evidence suggests that your body has to re-learn what’s good and what’s bad almost from scratch.
“In a way, infection of the measles virus basically sets the immune system to default mode,” says Mansour Haeryfar, a professor of immunology at Western University, Canada, “as if it has never encountered any microbes in the past”.
This re-learning process takes up to three years, which “around the time it takes infants to acquire immunity to everyday pathogens in the first place”. In the meantime…
It’s not surprising, then, that measles doesn’t just increase the risk of illness, but also death. In fact, childhood mortality from other viruses is strongly linked to the incidence of measles. The 2015 study showed that when childhood mortality in the UK, US, or Denmark goes up, this is usually because measles has become more prevalent.
The findings explain why vaccinating children against measles has the unexpected, beneficial side-effect of reducing deaths among children, way beyond the numbers who were ever at risk of dying from measles itself.
Of course, an extremely effective and safe vaccine offers protection against both measles and the immune amnesia it causes. But with the steep rise in anti-vaccination sentiment during the pandemic and the increasing willingness of conservative leaders to disregard public health protections in favor of “individual freedom”, widely vaccinating against this dangerous pathogen in the US & elsewhere will be more difficult than in the past.
“Portions of this paper were not presented at 81st Annual American Psychological Association Convention…” — LOL. You can read more about this paper at Wikipedia. (via @ecohugger)
About 5.9 million years ago, due to a combination of tectonic movements and changes in climate, the Mediterranean Sea mostly dried up for over 600,000 years. The Messinian salinity crisis may have raised global sea levels by as much as 33 feet and decreased the salinity of the world’s oceans, raising the freezing point. And then, much more suddenly, it was refilled in less than two years in the Zanclean Flood.
Two years to refill the whole Mediterranean! Apparently the water level rose at 30 feet per day, fed by a river that carried 1000 times more water than the Amazon at velocities exceeding 88 mph. When the water reached a barrier near present-day Sicily, it flowed into the eastern basin via a mile-high waterfall in which the water was moving at 100 mph. The weight of so much water moving into the area so quickly would have triggered seismic activity, resulting in landslides that could have produced tsunamis with wave heights of 330 feet. So much wow!
P.S. For XKCD, Randall Munroe wrote a comic called Time that unfolded over a series of four months and was based on a future Zanclean-like flood. (via open culture)
From Veritasium, a video about an experiment in evolution that’s been running continuously for more than 33 years.1The LTEE (the E. coli long-term evolution experiment) was started with 12 identical bacterial populations in 1988 and as of early 2020, they have reached 73,500 generations (the equivalent of 1.5 to 2 million years in human generational terms). When you can fast-forward evolution while also preserving past generations (the bacteria can be easily frozen and reanimated), you can discover some surprising things about it.
Well, sort of. As you will learn in the video, the bacteria can be frozen without damaging them or ending the experiment, so the experiment was interrupted for 6 months due to the Covid-19 pandemic. But they’re back at it now.↩
No doubt motivated by this month’s release of Moonfall, the latest movie from disaster shlockmeister Roland Emmerich, Kurzgesagt has made a video that shows what would happen to civilization should the Moon somehow get knocked from its orbit and head straight for the Earth. Spoiler: the Moon doesn’t even need to reach us to kill almost all life on the planet.
The James Webb Space Telescope is designed to be positioned near one of the five Lagrange Points in the Sun/Earth system, special areas of gravitational equilibrium that keep objects stationary relative to both the Earth and the Sun. Here’s how Lagrange Points work and why they are so useful for spacecraft like the Webb.
The data set — the first to quantify land dispossession and forced migration in the United States — also reveals that tribes with land today were systematically forced into less-valuable areas, which excluded them from key sectors of the U.S. economy, including the energy market. The negative effects continue to this day: Modern Indigenous lands are at increased risk from climate change hazards, especially extreme heat and decreased precipitation.
What’s different about this study, says Deondre Smiles, a geographer and citizen of the Leech Lake Band of Ojibwe, is the quantification of the land dispossession:
Indigenous people have always understood the devastating effects of these policies, Smiles says. But most of their stories existed only in qualitative historical records, including hundreds of treaties, or oral histories. “The pushback you get in academia is that qualitative narratives are not robust. [Scientists often ask,] ‘Where’s the data? Where’s the hard science?’” Smiles says. “It’s right here, in this article.”
The Wageningen University & Research houses a collection of almost 1200 drawings of the root systems of trees, grasses, crops, shrubs, weeds, flowers, and other plants. These drawings were done of plants in Europe, mostly in Austria, over a period of 40 years and are a wonderful combination of scientifically valuable and aesthetically pleasing.
The James Webb Space Telescope is still winging its way to its permanent home at the L2 point1 about 930,000 miles from Earth — it’s due to arrive in about 4 days. It’s a massive and fascinating project and for his YouTube series Smarter Every Day, Destin Sandlin talked to Nobel laureate John Mather, the senior project scientist for the JWST, about how the telescope works.
Also worth a watch is Real Engineering’s The Insane Engineering of James Webb Telescope:
It really is a marvel of modern science & engineering — I can’t wait to see what the telescope sees once it’s fully operational.
You can read about Lagrange points here or here…they are interesting!↩
In this clever simulation, bouncing balls obeying the laws of physics somehow arrange themselves, mid-chaos, into neat patterns. This is immensely satisfying.
Spoiler: the trick here is a pair of simulations stitched together, like a physics Texas Switch: “Each sequence is obtained by joining two simulations, both starting from the time in which the balls are arranged regularly. One simulates forward in time, one backwards.”
Charles and Ray Eames’ 1977 short film Powers of Ten is one of the best bits of science communication ever created…and a personal favorite of mine. Here’s a description of the original film:
Powers of Ten takes us on an adventure in magnitudes. Starting at a picnic by the lakeside in Chicago, this famous film transports us to the outer edges of the universe. Every ten seconds we view the starting point from ten times farther out until our own galaxy is visible only a s a speck of light among many others. Returning to Earth with breathtaking speed, we move inward — into the hand of the sleeping picnicker — with ten times more magnification every ten seconds. Our journey ends inside a proton of a carbon atom within a DNA molecule in a white blood cell.
As an homage, the BBC and particle physicist Brian Cox have created an updated version that reflects what we’ve learned about the universe in the 45 years since Powers of Ten was made. The new video zooms out to the limits of our current observational powers, to about 100 billion light years away, 1000X wider than in the original. (I wish they would have done the zoom in part of the video too, but maybe next year!)
And if you’d like to explore the scales of the universe for yourself, check out the Universe in a Nutshell app from Tim Urban and Kurzgesagt — you can zoom in and out as far as you want and interact with and learn about objects along the way.
While indigenous communities, farmers, and those living close to the land have known for generations the role that beavers play in maintaining healthy ecosystems, more and more scientists have been experimenting and gathering data on just how essential these animals are. Through their actions, beaver (and humans mimicking their actions) can help restore river-based ecosystems, improve wildfire resilience, bring fish & other animals back to habitats, and fight drought.
Beaver should be our national climate action plan because connected floodplains store water, store carbon, improve water quality, improve the resilience to wildfire, and what beaver do play an enormous role in controlling the dynamics of those systems. So, yeah, it sounds really trite to give a national climate action plan to some rodents. But if we don’t do that directly, we should at least be trying to mimic what they do.
The video above provides a great overview on what we’re learning about how beavers restore ecosystems. Last month, I linked to this Sacramento Bee piece about how beavers were used to revitalize a dry California creek bed:
The creek bed, altered by decades of agricultural use, had looked like a wildfire risk. It came back to life far faster than anticipated after the beavers began building dams that retained water longer.
“It was insane, it was awesome,” said Lynnette Batt, the conservation director of the Placer Land Trust, which owns and maintains the Doty Ravine Preserve.
“It went from dry grassland… to totally revegetated, trees popping up, willows, wetland plants of all types, different meandering stream channels across about 60 acres of floodplain,” she said.
The Doty Ravine project cost about $58,000, money that went toward preparing the site for beavers to do their work.
In comparison, a traditional constructed restoration project using heavy equipment across that much land could cost $1 to $2 million, according to Batt.
Across North America and Europe, public agencies and private actors have reintroduced beavers through “re-wilding” initiatives. In California and Oregon, beavers are enhancing wetlands that are critical breeding habitat for salmonids, amphibians, and waterfowl. In Nevada, Utah, and New Mexico, environmental groups have partnered with ranchers and farmers to encourage beaver activity on small streams. Watershed advocates in California are leading a campaign to have beavers removed from the state’s non-native species list, so that they can be managed as a keystone species rather than a nuisance. And federal policy is shifting, too. The U.S. Fish and Wildlife Service sees beavers as “partners in restoration,” and the Forest Service has supported efforts like the Methow Beaver Project, which mitigates water shortages in North Central Washington. Since 2017, the USDA Natural Resource Conservation Service has funded beaver initiatives through its Aquatic Restoration Program.
That’s a decrease in life expectancy of 1.8 years from 2019. Here are some more of the report’s significant findings:
In 2020, life expectancy at birth was 77.0 years for the total U.S. population — a decrease of 1.8 years from 78.8 years in 2019. For males, life expectancy decreased 2.1 years from 76.3 in 2019 to 74.2 in 2020. For females, life expectancy decreased 1.5 years from 81.4 in 2019 to 79.9 in 2020.
In 2020, the difference in life expectancy between females and males was 5.7 years, an increase of 0.6 year from 2019.
The age-adjusted death rate for the total population increased 16.8% from 715.2 per 100,000 standard population in 2019 to 835.4 in 2020. Age-adjusted death rates increased in 2020 from 2019 for all race-ethnicity-sex groups, increasing 42.7% for Hispanic males, 32.4% for Hispanic females, 28.0% for non-Hispanic Black males, 24.9% for non-Hispanic Black females, 13.4% for non-Hispanic White males, and 12.1% for non-Hispanic White females.
In 2020, 9 of the 10 leading causes of death remained the same as in 2019. The top leading cause was heart disease, followed by cancer. COVID-19, newly added as a cause of death in 2020, became the 3rd leading cause of death. Of the remaining leading causes in 2020 (unintentional injuries, stroke, chronic lower respiratory diseases, Alzheimer disease, diabetes, influenza and pneumonia, and kidney disease), 5 causes changed ranks from 2019. Unintentional injuries, the 3rd leading cause in 2019, became the 4th leading cause in 2020. Chronic lower respiratory diseases, the 4th leading cause in 2019, became the 6th. Alzheimer disease, the 6th leading cause in 2019, became the 7th. Diabetes, the 7th leading cause in 2019, became the 8th. Kidney disease, the 8th leading cause in 2019, became the 10th leading cause in 2020. Stroke, and influenza and pneumonia, remained the 5th and 9th leading causes, respectively. Suicide dropped from the list of 10 leading causes in 2020.
And from the report’s summary:
From 2019 to 2020, the age-adjusted death rate for the total population increased 16.8%. This single-year increase is the largest since the first year that annual mortality data for the entire United States became available. The decrease in life expectancy for the total population of 1.8 years from 2019 to 2020 is the largest single-year decrease in more than 75 years.
Since more people in the US died of Covid in 2021 than in 2020, I’d expect the decline life expectancy and the rise in death rate to continue.
In the mid-1820s, the naturalist Charles Darwin began his research career studying botany in university and he bought a portable brass microscope to aid him in his studies. The microscope was passed down through the generations of his family and was recently sold at auction for ~$790,000.
Charles Darwin’s own research career began in earnest with the more prosaic, but no less philosophical, investigation into the sea creatures being dredged up from the Firth of Forth, which Charles obtained from friendly fishermen while he was trying to avoid his medical studies at the University of Edinburgh. Darwin’s studies of these strange ‘zoophytes’, which made liberal use of the microscope, began in 1826 and reached a successful conclusion in the spring of 1827, when he presented his very first scientific paper to the University’s Plinian Society.
These dates coincide with the first appearance of the present model on the market: the instrument was designed by Charles Gould for the firm Cary around 1825, and was certainly on sale by 1826, when its accompanying booklet was mentioned in the Mechanics’ Register. Of the five other surviving microscopes associated with Charles Darwin, four are known to have been acquired later (two in 1831, one each in 1847 and c.1848), and the other cannot be used for studying marine invertebrates.
America was not prepared for COVID-19 when it arrived. It was not prepared for last winter’s surge. It was not prepared for Delta’s arrival in the summer or its current winter assault. More than 1,000 Americans are still dying of COVID every day, and more have died this year than last. Hospitalizations are rising in 42 states. The University of Nebraska Medical Center in Omaha, which entered the pandemic as arguably the best-prepared hospital in the country, recently went from 70 COVID patients to 110 in four days, leaving its staff “grasping for resolve,” the virologist John Lowe told me. And now comes Omicron.
Will the new and rapidly spreading variant overwhelm the U.S. health-care system? The question is moot because the system is already overwhelmed, in a way that is affecting all patients, COVID or otherwise. “The level of care that we’ve come to expect in our hospitals no longer exists,” Lowe said.
The real unknown is what an Omicron cross will do when it follows a Delta hook. Given what scientists have learned in the three weeks since Omicron’s discovery, “some of the absolute worst-case scenarios that were possible when we saw its genome are off the table, but so are some of the most hopeful scenarios,” Dylan Morris, an evolutionary biologist at UCLA, told me. In any case, America is not prepared for Omicron. The variant’s threat is far greater at the societal level than at the personal one, and policy makers have already cut themselves off from the tools needed to protect the populations they serve. Like the variants that preceded it, Omicron requires individuals to think and act for the collective good — which is to say, it poses a heightened version of the same challenge that the U.S. has failed for two straight years, in bipartisan fashion.
The main point:
Here, then, is the problem: People who are unlikely to be hospitalized by Omicron might still feel reasonably protected, but they can spread the virus to those who are more vulnerable, quickly enough to seriously batter an already collapsing health-care system that will then struggle to care for anyone — vaccinated, boosted, or otherwise. The collective threat is substantially greater than the individual one. And the U.S. is ill-poised to meet it.
If someone got sick, I know others could too. A week later, many of my friends will spend Christmas with their own families. At best, a cluster of infections at the birthday party would derail those plans, creating days of anxious quarantine or isolation, and forcing the people I love to spend time away from their loved ones. At worst, people might unknowingly carry the virus to their respective families, which might include elderly, immunocompromised, unvaccinated, partially vaccinated, or otherwise vulnerable people. Being born eight days before Christmas creates almost the perfect conditions for one potential super-spreader event to set off many more.
As has been the case the entire pandemic, our political and public health systems are not equipped to collectively combat this virus, so it falls to individuals to make good choices for our communities. It’s a nearly impossible thing to ask to pandemic-weary folks to focus in again on making good personal choices and even harder to achieve if few are willing to do it, but goddammit we have to try.
Science is the foundation for our success. 150 years ago nobody knew where diseases came from. Or more precisely, people thought they knew, but they were wrong. The widely accepted idea at the time was the ‘Miasma’ theory of disease. Miasma, the theory held, was a form of “bad air” that causes disease. The word malaria is testament to the idea that ‘mal aria’ — ‘bad air’ in medieval Italian — is the cause of the disease.
Thanks to the work of a number of doctors and chemists in the second half of the 19th century humanity learned that not noxious air, but specific germs cause infectious diseases. The germ theory of disease was the breakthrough in the fight against the microbe. Scientists identified the pathogens that cause the different diseases and thereby laid the foundation for perhaps the most important technical innovation in our fight against them: vaccines.
Here’s what vaccines did for us, in three charts:
Even among those who accept and understand how good vaccines are at stopping disease, it’s difficult to truly appreciate just how incredible and transformative they have been. By one estimate, vaccines saved between 150 & 200 million lives from 1980 & 2018…and that’s just for smallpox. Covid-19 vaccines have saved hundreds of thousands of lives in Europe and the US in the first year of their availability. Truly a miraculous invention.
Confronted with the seemingly empty universe, humanity faces a dilemma. We desperately want to know if we are alone in the Milky Way. We want to call out and reveal ourselves to anyone watching but that could be the last thing we ever do. Because maybe the universe is not empty. Maybe it’s full of civilizations but they are hiding from each other. Maybe the civilizations that attracted attention in the past were wiped away by invisible arrows. This is the Dark Forest solution to the Fermi paradox.
I have The Dark Forest on the Kindle, so I looked up how this is explained in the book (spoilers, obvs):
“The universe is a dark forest. Every civilization is an armed hunter stalking through the trees like a ghost, gently pushing aside branches that block the path and trying to tread without sound. Even breathing is done with care. The hunter has to be careful, because everywhere in the forest are stealthy hunters like him. If he finds other life-another hunter, an angel or a demon, a delicate infant or a tottering old man, a fairy or a demigod-there’s only one thing he can do: open fire and eliminate them. In this forest, hell is other people. An eternal threat that any life that exposes its own existence will be swiftly wiped out. This is the picture of cosmic civilization. It’s the explanation for the Fermi Paradox.”
Shi Qiang lit another cigarette, if only to have a bit of light.
“But in this dark forest, there’s a stupid child called humanity, who has built a bonfire and is standing beside it shouting, ‘Here I am! Here I am!’” Luo Ji said.
“Has anyone heard it?”
“That’s guaranteed. But those shouts alone can’t be used to determine the child’s location. Humanity has not yet transmitted information about the exact position of Earth and the Solar System into the universe. From the information that has been sent out, all that can be learned is the distance between Earth and Trisolaris, and their general heading in the Milky Way. The precise location of the two worlds is still a mystery. Since we’re located in the wilderness of the periphery of the galaxy, we’re a little safer.”
That’s the basic idea, but there’s more to it…you should watch the video or, even better, read the series — I’ve read the entire trilogy twice and this makes me want to read it again! (I loved the Drive Easter egg towards the end of the video. Well played.)
In this entertaining, informative, and charmingly goofy video, Dr. Kevin Hainline tells us all about the James Webb Space Telescope. The JWST is a bigger and better version of the Hubble Space Telescope and will allow scientists to peer deeper into the universe and farther back in time than ever before.
Listen, science is hard! Engineering is hard! It’s difficult to figure out how to build an incredibly sensitive infrared detector that you have to cram together on the back of a giant, foldable, gold covered mirror, sitting on a delicate, tennis-court-sized parasol, that can survive a rocket launch! It’s hard stuff!
And hundreds and hundreds of people around the world have been working on it together. JWST is the single most complicated science project human beings have ever attempted. But it’s been worth it. Because we want to discover the earliest galaxies in the universe, and clouds on other planets, and baby star-forming regions, and debris disks around stars, and weird dwarf galaxies, and supermassive black holes!
It’s been in development for almost thirty years and everyone is really ready for it! The James Webb Space Telescope is about to change astronomy. Get ready for discovery!
I am ready and excited! The JWST is currently set to launch no earlier than Dec 24, 2021. You can follow the progress of the launch here.
During the flyby, Parker Solar Probe passed into and out of the corona several times. This is proved what some had predicted — that the Alfvén critical surface isn’t shaped like a smooth ball. Rather, it has spikes and valleys that wrinkle the surface. Discovering where these protrusions line up with solar activity coming from the surface can help scientists learn how events on the Sun affect the atmosphere and solar wind.
Six panels of images taken from inside a coronal streamer. They appear grayish with white streaks showing particles in the solar wind.
At one point, as Parker Solar Probe dipped to just beneath 15 solar radii (around 6.5 million miles) from the Sun’s surface, it transited a feature in the corona called a pseudostreamer. Pseudostreamers are massive structures that rise above the Sun’s surface and can be seen from Earth during solar eclipses.
Passing through the pseudostreamer was like flying into the eye of a storm. Inside the pseudostreamer, the conditions quieted, particles slowed, and number of switchbacks dropped — a dramatic change from the busy barrage of particles the spacecraft usually encounters in the solar wind.
For the first time, the spacecraft found itself in a region where the magnetic fields were strong enough to dominate the movement of particles there. These conditions were the definitive proof the spacecraft had passed the Alfvén critical surface and entered the solar atmosphere where magnetic fields shape the movement of everything in the region.
The first passage through the corona, which lasted only a few hours, is one of many planned for the mission. Parker will continue to spiral closer to the Sun, eventually reaching as close as 8.86 solar radii (3.83 million miles) from the surface. Upcoming flybys, the next of which is happening in January 2022, will likely bring Parker Solar Probe through the corona again.
The video above provides a great overview of the origins, objectives, and motivations for the mission.
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