@coreyspowell@mastodon.social
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coreyspowell

@coreyspowell@mastodon.social

Writer, editor, magazine maker, podcaster, procrastinator.

Former editor of Discover and American Scientist magazines. Co-host of #ScienceRules podcast. Invisible Universe on Substack: https://invisibleuniverse.substack.com/

Co-founder of OpenMind magazine.

#science #nature #space #scicomm

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alanboyle, to Amazon
@alanboyle@mastodon.social avatar

In a memo to the staff of his space venture, Jeff Bezos says the company's next CEO, outgoing exec Dave Limp, has an "outstanding sense of urgency" - which is something Blue Origin's critics say has been sorely lacking. https://www.geekwire.com/2023/jeff-bezos-blue-origin-ceo-dave-limp-urgency/

stim3on, to random
@stim3on@fosstodon.org avatar

The full landing sequence of

I wrote a python script to undo the frame blending from the original video and then upscaled the images with AI.
The video is at 120x playback speed, in reality this took about 66 minutes.

Credit: / Simeon Schmauß

Video of Chandrayaan 3 landing on the Moon. The side of the lander with it's solar panels is visible on the left side of the video. On the right side, the lunar surface moves by, it starts at an altitude of 30km with the lunar limb visible. As the craft descends a few larger craters become visible. Shortly before touchdown it stops briefly above the ground to assess the terrain, then proceeds to land.

pomarede, to space
@pomarede@mastodon.social avatar

To celebrate the recovery of communications with #Voyager2, here is a bunch of classic Science Magazine, Nature, and Nature Astronomy covers featuring the adventures of the epic spacecraft, now located 19.9 billion kilometers away from Earth 🌍 📡 🚀

#space #astronomy #astrophysics #astrodon #universe #solarsystem #science #research #nasa #jpl #voyager #spacecraft

On 30 August 2007 Voyager 2 began to cross the termination shock, a boundary produced by the inter-action of the Sun with the rest of the Galaxy, where the supersonic solar wind abruptly slows as it presses outward against the surrounding interstellar matter. Five Letters in this issue present the data that the probe sent back. The Voyager 2 crossings occurred about 1.5 billion kilometres closer to the Sun than those of Voyager 1, illustrating the asymmetry of the heliosphere. Meanwhile, Voyagers 1 and 2 head for interstellar space, so may still have more to tell us. Cover graphic: Henry Kline/JPL
A cover of the Nature Astronomy Journal featuring the Voyager 2 spacecraft on its way out of the heliosphere. After 41 years of travel, Voyager 2 exited the heliosphere on 5 November 2018 at a distance of 119 au. This issue features five papers reporting plasma, particle and magnetic field measurements from the heliosheath, heliopause and interstellar medium, and their implications for our knowledge of the heliosphere.

flargh, to random
@flargh@mastodon.social avatar

“Foundation” vs “Dune”

Isaac Asimov: we’re headed for some bleak imperialist nonsense but humanity’s salvation will come from using math we haven’t discovered yet

Frank Herbert: we’re headed for some bleak imperialist nonsense but humanity’s salvation will come from tripping on drugs we haven’t discovered yet

kevinmgill, to random

A new look at Io, taken by the Juno spacecraft yesterday while approaching Perijove 53

NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill

SarahOestreich, to random

A day or two ago there was a woman on Twitter who apparently wants to sell a biopic about a woman who fought for the victims of the atomic bomb tests in New Mexico. One problem: almost everything she said in the thread is made up. It got over 12 million views.

I understand being upset other stories haven’t been told, especially in regards to harms done to one’s people. But doesn’t seem to idealize its subject and one can advocate for other stories without lying. 1/

MichaelEMann, to random

"The new "abnormal": Experts agree climate change will intensify droughts and heatwaves in the future"| Great piece in @Salon by @MatthewRozsa on our new (Tripathy et al: https://www.pnas.org/doi/10.1073/pnas.2219825120) @PNASNews article: https://www.salon.com/2023/07/05/the-new-abnormal-experts-agree-climate-change-will-intensify-droughts-and-heatwaves-in-the-future/

dangillmor, to random
@dangillmor@mastodon.social avatar

If you're thinking of using Facebook/Instagram's Twitter clone, here's a reminder of just how invasive it will be of your privacy:

ZachWeinersmith, to random
@ZachWeinersmith@mastodon.social avatar

Quantum
http://smbc-comics.com/comic/coddled

franco_vazza, (edited ) to Astro
@franco_vazza@mastodon.social avatar

a new with quite some range:

Astronomers (not like me, real hardcore astronomers!) collect photons to observe the Universe and study its properties in space and time.

How large is the range of wavelengths of the photons they use for this?

And how much large is this range, compared to, say, the range of sizes of organisms studied in biology?


DamnInteresting, to random
@DamnInteresting@mastodon.cloud avatar

Oldest Known Neanderthal Engravings Were Sealed in a Cave for 57,000 Years
https://www.smithsonianmag.com/science-nature/oldest-known-neanderthal-engravings-discovered-in-french-cave-180982408/?utm_source=DamnInteresting

Deglassco, (edited ) to history

102 years ago, on June 15, 1921, Bessie Coleman achieved a significant milestone as the FIRST Black woman in history to earn a pilot's license, 2 years before Amelia Earhart. With great courage and determination, “Brave Bessie,” as she would later be called, pursued her own path, striving always to fulfill her mother's aspiration for her children to “amount to something.”

https://youtu.be/wckEiKzCBqc

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#BlackHistory @blackmastodon @BlackMastodon #BlackMastodon #histodons #History #Aviation

CopernicusEU, to random
@CopernicusEU@respublicae.eu avatar

RT @m_parrington: Smoke from across Canada showing distinct transport patterns to the North Atlantic over the coming days in the @CopernicusECMWF Atmosphere Monitoring Service @ECMWF aerosol optical depth 5-day forecast initialised on 6 June at 00 UTC https://ads.atmosphere.copernicus.eu/cdsapp#!/dataset/cams-global-atmospheric-composition-forecasts?tab=overview https://t.co/S4yoBY2XGB

🐦🔗: https://n.respublicae.eu/CopernicusEU/status/1666348022085693445

video/mp4

willoremus, to random
@willoremus@mastodon.social avatar

I wrote about the single biggest constraint on the AI boom that no one wants to talk about—the enormous computing cost—and how it's quietly shaping every aspect of the industry that's supposed to revolutionize our lives. https://www.washingtonpost.com/technology/2023/06/05/chatgpt-hidden-cost-gpu-compute/

AkaSci, (edited ) to random
@AkaSci@fosstodon.org avatar

The JWST team recently released this image of Saturn's moon Enceladus, showing water plumes extending out 10,000 km, 20 times the size of the moon itself, which creates a fuzzy torus of water particles around the orbit of Enceladus.
The inset shows a mosaic of Enceladus and its water jets, based on images taken by the Cassini orbiter in 2009.
Let's learn more about Enceladus and examine why the JWST image is so low-res and pixelated.
https://www.nasa.gov/feature/goddard/2023/webb-maps-surprisingly-large-plume-jetting-from-saturn-s-moon-enceladus

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AkaSci, (edited )
@AkaSci@fosstodon.org avatar

Here is a beautiful colorized version of the image posted above of Enceladus and its water jets. The image was taken by the Cassini spacecraft on Aug. 13, 2010 from a distance of 59,000 km.

Gordan Ugarković colored Saturn's limb backlit by the Sun as it would appear to the human eye.

Also makes a great desktop background image.

Can an earthbound telescope take such images? No.

https://www.flickr.com/photos/ugordan/5931534600
Credit: NASA / JPL / SSI / Gordan Ugarkovic

10/n

fraser, to random
@fraser@m.universetoday.com avatar

Here's How You Could Get Impossibly Large Galaxies in the Early Universe

One of the most exciting discoveries made by JWST is a collection of large, mature galaxies seen in the early Universe. Most models of the early Universe don't predict galaxies this big, this early, but this depends on how the first stars formed. According to a new study, the first stars might have dramatically differed from the stars we see today. They could have gathered material exceptionally efficiently without interfering with the formation of other stars, allowing their galaxies to come together quickly.

https://phys.org/news/2023-05-theoretical-mystery-early-massive-galaxies.html

AkaSci, (edited ) to random
@AkaSci@fosstodon.org avatar

A new Type II core-collapse Supernova SN 2023ixf was detected yesterday in the Pinwheel Galaxy (aka Messier 101, M101 and NGC 5457).
At 21 million light-years distance and only 14.9 mag, it is too far and too faint to stand out in the night sky, unlike some other supernovae observed by humans over the past few thousand years.
However, it is of great interest to the astrophysics community.
Details at https://www.wis-tns.org/object/2023ixf

1/n

AkaSci, (edited )
@AkaSci@fosstodon.org avatar

Supernova SN2023ixf continues to brighten!
A more recent photometric measurement of supernova SN2023ixf made by the Virtual Telescope shows a magnitude of 10.9 today Sunday May 21 at 21:08 UTC (5:08 p.m. EDT).

https://twitter.com/VirtualTelescop/status/1660402515131727874

15/n

AkaSci, (edited )
@AkaSci@fosstodon.org avatar

The IceCube Neutrino Observatory, a cubic-km-sized neutrino detector at the South Pole, did not detect any neutrinos arriving from the direction of supernova SN2023ixf in the M101 galaxy over the past 4 days.
@franco_vazza and @coreyspowell indicate that this is expected, given the vast distance to SN2023ixf - 21 million light-years.
The observations set an upper limit on the energy of neutrinos from SN2023ixf.
https://www.astronomerstelegram.org/?read=16043
https://icecube.wisc.edu/

16/n

mcnees, to random
@mcnees@mastodon.social avatar

Apollo 10 launched in 1969 from Launch Complex 39-B at Kennedy Space Center.

The Lunar Module approached within 16 km of the surface before the crew returned to Earth. The next mission would deliver astronauts to the surface.

Images: NASA

The lunar module detaching from the Command and Service Module, to begin its orbit around the moon. It is reflective and angular, with a small dish jutting prominently off one side and bright reflections on its surface.
The Command and Service Module, as seen from the Lunar Module. It is cylindrical, with a conical top that is highly reflective and shows an image of the surface below.
The blue Earth hanging in space, with about a third of its disk covered in show. Landmasses and clouds are visible, but the blue of ocean is most prominent.

mcnees,
@mcnees@mastodon.social avatar

If you aren't too busy, take a minute to look through NASA's Project Apollo archive on Flickr.

https://www.flickr.com/photos/projectapolloarchive/albums

This is a totally safe use of your time, you definitely won't look up two hours from now and ask where your morning went.

Images: NASA

A black and white photo dominated by a single large crater, its left edge partly in shadow, pockmarked by several smaller craters. Three of the small craters are arranged along the bottom limb of the larger crater like beads on a necklace, their interiors shrouded in shadow,
An astronaut in their puffy white suit, standing next to a lunar rover with a bright golden radio dish pointed directly upwards.
The blue Earth, hanging in black space. From left to right about 80% of the disk is lit by the Sun, swirling white clouds over blue ocean. The brown and green of land masses peak through some of the clouds.

mustapipa, to space

For the first time, mathematicians have proved that planetary in a solar system will always be .

Once you account for gravitational attraction between the planets, everything gets complicated. You can no longer explicitly calculate the ’ positions and velocities over long periods of time, and must instead ask qualitative questions about how they might behave.

There could be major collisions.


https://www.quantamagazine.org/new-math-shows-when-solar-systems-become-unstable-20230516/

franco_vazza, to space
@franco_vazza@mastodon.social avatar

A new sparkling

It's common experience that the particles in fluids (water, our atmosphere etc) "collide".

This means that they feel each other by exchanging energy and momentum in 1-to-1 collisions.

"Collisionality" is why, if we stir water with a spoon, we see waves carrying this perturbation to the rest of the fluid.

However, understanding the colllisionality of space gas requires a bit more effort.

Why?
Spoiler: there's wine at the end 🍾 )

franco_vazza,
@franco_vazza@mastodon.social avatar

The mean free path given by 1-to-1 collision for the IGM is incredibly large:
it means that before hitting another proton, a proton of this gas has to travel on average a distance larger than the Milky Way (!), or else, that it has to wait for several TENS OF MILLION YEARS (!).

reedmideke, to random
@reedmideke@mastodon.social avatar

Gooooooo "🚨 Shocking RIME update 🚨

The RIME antenna on @ESA_JUICE
is free!!!

This Juice Monitoring Camera GIF shows the moments after the Flight Control Team at ESA fired the remaining 'actuator' on the jammed bracket.

More info: https://www.esa.int/Science_Exploration/Space_Science/Juice/Juice_s_RIME_antenna_breaks_free"

(via https://twitter.com/esaoperations/status/1657069054991925275)

elakdawalla, to space

I just wrote an article about the moons of . Turns out there’s liquid water inside those moons, probably. We need a mission to find out! https://skyandtelescope.org/astronomy-news/four-of-uranuss-moons-might-contain-briny-oceans/

pomarede, to science
@pomarede@mastodon.social avatar

CHIME Telescope doubles the number of repeating FRBs (Fast Radio Bursts - of unknown origin), providing targets for other telescopes, including those that can measure their positions very accurately, and let us know which galaxies they come from.

https://news.ubc.ca/2023/04/26/chime-astronomers-repeating-cosmic-probes/

AkaSci, (edited ) to random
@AkaSci@fosstodon.org avatar

What is that curious looking object imaged by Mars Rover Perseverance yesterday?
No, it is not a target practice plate for SHERLOC the laser zapper, it is the calibration target for PIXL, the Planetary Instrument for X-Ray Lithochemistry, which is mounted at the end of the robotic arm along with SHERLOC and the drilling apparatus.
The calibration target contains 4 sample disks with known X-ray signatures that PIXL scans approx. once a month.
https://mars.nasa.gov/mars2020/multimedia/raw-images/

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