Wonderful shots of the pyramids of Giza by Egyptian photographer Karim Amr. From a caption on one of his photos three years ago:
I’m a 21 years old photographer you can see a lot of photos I share at the pyramids cause I just live near the pyramids so it’s easy for me to go and shoot there. I started doing photography to share my thoughts with others it’s how I express my feelings it’s also my escape from life. Life is tough and not easy for some of us and you got to find your place in this world.
Well, the total solar eclipse was once again completely awesome. I didn’t have to go chasing all over tarnation this time, the telescope worked out amazingly well, and I got to share it with a bunch of first-timers, both in-person and via text. I’m going to share some thoughts, photos, and videos from others around the internet in an even bloggier fashion than usual. Here we go.
Quick solar prominence explainer interlude: if you had a clear look at totality, you may have noticed some orange bits poking out around the moon. NASA: What is a solar prominence?
A solar prominence (also known as a filament when viewed against the solar disk) is a large, bright feature extending outward from the Sun’s surface. Prominences are anchored to the Sun’s surface in the photosphere, and extend outwards into the Sun’s hot outer atmosphere, called the corona. A prominence forms over timescales of about a day, and stable prominences may persist in the corona for several months, looping hundreds of thousands of miles into space. Scientists are still researching how and why prominences are formed.
The red-glowing looped material is plasma, a hot gas comprised of electrically charged hydrogen and helium. The prominence plasma flows along a tangled and twisted structure of magnetic fields generated by the sun’s internal dynamo. An erupting prominence occurs when such a structure becomes unstable and bursts outward, releasing the plasma.
A timelapse video of totality from Scientific American:
A sunspot is simply a region on the surface of the sun-called the photosphere-that is temporarily cool and dark compared to surrounding regions. Solar measurements reveal that the average surface temperature of the sun is 6000° Celsius and that sunspots are about 1500° Celsius cooler than the area surrounding them (still very hot), and can last anywhere from a few hours to a few months. Sunspots expand and contract as they move across the surface of the sun and can be as large as 80,000 km in diameter.
Sunspots are magnetic regions on the sun with magnetic field strengths thousands of times stronger than the Earth’s magnetic field, and often appear in pairs that are aligned in an east-west direction. One set will have a positive or north magnetic field while the other set will have a negative or south magnetic field. The field is strongest in the darker parts of the sunspots — called the umbra. The field is weaker and more horizontal in the lighter part-the penumbra. Overall, sunspots have a magnetic field that is about 1000 times stronger than the surrounding photosphere.
This Instagram account has a lovingly assembled collection of solar eclipse stamps from around the world (Aruba, Bhutan, Chile, Romania, Kenya, and even North Korea).
Total solar eclipses occur because the moon and the sun have the same apparent size in Earth’s sky — the sun is about 400 times wider than the moon, but the moon is about 400 times closer.
But the moon is slowly moving away from Earth by about 1-1/2 inches (4 centimeters) per year, according to the NASA statement. As a result, total solar eclipses will cease to exist in the very distant future, because the apparent size of the moon in Earth’s sky will be too small to cover the sun completely.
“Over time, the number and frequency of total solar eclipses will decrease,” Vondrak said in the statement. “About 600 million years from now, Earth will experience the beauty and drama of a total solar eclipse for the last time.”
Ok, that’s all for now. Depending on what else I come across, I might update this post periodically throughout the day. I know some of you who were lucky enough to see the total eclipse shared your experiences in the comments of yesterday’s post but feel free to do so here as well.
It’s been about five years since scientists captured the first blurry image of a black hole. Using what they learned from that experience, they’ve teased out some more detailed images of the black holes at the centers of the Milky Way galaxy (top) and the M87 galaxy (bottom). The process of collecting the data for these images is interesting:
The only way to “see” a black hole is to image the shadow created by light as it bends in response to the object’s powerful gravitational field. As Ars Science Editor John Timmer reported in 2019, the EHT isn’t a telescope in the traditional sense. Instead, it’s a collection of telescopes scattered around the globe. The EHT is created by interferometry, which uses light in the microwave regime of the electromagnetic spectrum captured at different locations. These recorded images are combined and processed to build an image with a resolution similar to that of a telescope the size of the most distant locations. Interferometry has been used at facilities like ALMA (the Atacama Large Millimeter/submillimeter Array) in northern Chile, where telescopes can be spread across 16 km of desert.
In theory, there’s no upper limit on the size of the array, but to determine which photons originated simultaneously at the source, you need very precise location and timing information on each of the sites. And you still have to gather sufficient photons to see anything at all. So atomic clocks were installed at many of the locations, and exact GPS measurements were built up over time. For the EHT, the large collecting area of ALMA-combined with choosing a wavelength in which supermassive black holes are very bright-ensured sufficient photons.
While this idea may initially sound somewhat mundane, it is anything but. The result is surprising because Sgr A*’s mass is about 4.3 million times that of the Sun, while M87*’s is about 6.5 billion times that of the Sun. Despite the significant difference in mass between the two supermassive black holes, the fact that their magnetic fields behave similarly and are both well-organized is an incredible discovery.
The Vela Supernova remnant, located about 800 light-years away from Earth, is the cosmic corpse of a massive star that exploded 11,000 years ago. It is one of the closest supernova remnants to Earth and the perfect subject for the remarkable Dark Energy Camera.
The supernova is a vast cosmic structure about 100 light-years across. For context, one would have to travel around the Earth 200 million times to have traveled a single light-year.
I didn’t know what to expect from this 1937 video explanation of how wire photos were transmitted to newspapers, but a double stunt sequence featuring an airplane and a death-defying photographer was not anywhere on my bingo card. This starts kinda slow but it picks up once they get into the completely fascinating explanation of how they sent photographs across the country using ordinary telephone lines. The whole setup was portable and they just hacked into a wire on a telephone pole, asked the operator to clear the line, and sent a photo scan via an analog modem. Ingenious!
The Wikipedia page about wire photos is worth a read — French designers argued that the technology was responsible for an early form of fast fashion.
After World War II at haute couture shows in Paris, Frederick L. Milton would sketch runway designs and transmit his sketches via Bélinographe to his subscribers, who could then copy Parisian fashions. In 1955, four major French couturiers (Lanvin, Dior, Patou, and Jacques Fath) sued Milton for piracy, and the case went to the Appellate Division of the New York Supreme Court. Wirephoto enabled a speed of transmission that the French designers argued damaged their businesses.
“Like many amateur photographers, I do occasionally experiment with editing.” Well, I can’t resist the kerfuffle around what’s going on with Princess Catherine. Yesterday she posted a photo of herself with her family that turned out to have been edited, and today she apologized for “any confusion” it might have caused. (Shared presumably in part to dispel rumors about her health and whereabouts, the photo “fans [those rumors] instead,” per the NY Times.)
Last week, Nieman Lab ran a story on how unusual the Palace’s response to gossip surrounding the situation has been. And if you really want to get into the weeds, Nieman Lab’s editor-in-chief Laura Hazard Owen also just linked to a three-minute TikTok video proposing that the original Instagram photo was actually taken last November.
See also Hilary Mantel’s 2013 essay in the London Review of Books: “I wanted to apologise. I wanted to say: it’s nothing personal, it’s monarchy I’m staring at.”
Alan Taylor is an under-appreciated internet curator. He’s been overseeing the photographic vibe over at The Atlantic’s In Focus for what seems like forever, and the quality is as high as ever. His latest post is 100 Years Ago in Photos: A Look Back at 1924.
The caption of that first photo reads:
Original caption from December 17, 1924: “Picks him up at 25 miles an hour! If the modern auto or truck hits you don’t worry. Equipped with this device you are simply given a free ride. This man even came from behind another car, was struck but not even scratched. The demonstration was given recently in Washington, D.C.”
Ansel Adams made a career of crafting photographs in exquisitely sharp focus and nearly infinite tonality and detail. His ability to consistently visualize a subject — not how it looked in reality but how it felt to him emotionally — led to some of the most famous images of America’s natural treasures including Half Dome in California’s Yosemite Valley, the Grand Tetons in Wyoming, and Denali in Alaska, the highest peak in the United States.
No pre-order links yet, but the stamps will be available on May 15. (via @anseladams)
After hiking to a clifftop vantage point, Amit slowly crept closer. Using a wide-angle lens, he set the action of two clashing Nubian ibex against the dramatic backdrop. The battle lasted for about 15 minutes before one male surrendered and the pair parted without serious injury.
Sriram Murali captured the jungle lit up by fireflies:
Sriram combined 50 individual 19-second exposures to show the firefly flashes produced over 16 minutes in the forests of the Anamalai Tiger Reserve near his hometown. He watched as pinpoint flashes appeared in the treetops increasing in number as they spread down along the branches until something remarkable happened. Synchronising, they pulsated through the canopy like a wave — the pattern punctuated with sequences of abrupt on-off bursts in unison.
This dragonfly unexpectedly landed on the turtle’s nose but instead of the turtle snapping up the insect, it appeared to be experiencing pleasure from the interaction as they shared a moment of peaceful coexistence amid a swamp’s murky waters.
This is a video slideshow of some of the best images from the Mars missions — Spirit, Opportunity, Curiosity, and Perseverance — presented in 4K resolution at 60fps. These look amazing on the biggest hi-res screen you can find. (via open culture)
To Mr. Lignier, the parallel is obvious. “Digital and social media companies use the same concept to keep the attention of the viewer as long as possible,” he said.
Indeed, social media has been described as “a Skinner Box for the modern human,” doling out periodic, unpredictable rewards — a like, a follow, a promising romantic match — that keep us glued to our phones.
Or maybe being able to keep ourselves busy pressing buttons is its own reward. In a 2014 study, scientists concluded that many human volunteers “preferred to administer electric shocks to themselves instead of being left alone with their thoughts.” Maybe we would rather sit around and push whatever levers are in front of us — even those that might make us feel bad - than sit with ourselves in quiet contemplation.
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