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Justin Bartel

@cephalopernicus.bsky.social
138 followers 329 following 327 posts

#BetterKnowAnAsteroid has made it to the sky site, prepare for space rock news. Space wizard. Dog haver. Seasonal baker.

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Reposted by Justin Bartel
Robert "The Bobby Yaga" McNees @mcnees.bsky.social · 06/10/2026
Happy “Evidence that there are things outside the Milky Way” Day to all who celebrate. 🧪 🔭
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Elizabeth Anne, PhD @lacksauthority.bsky.social · 05/10/2026
never the wrong time for this classic
Screenshot of a tweet by @RobbtKraft reading “scientist: "does everyone here know what Watson and Crick discovered?" 
me from back of room: "Rosalind Franklin's notes"”
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Justin Bartel @cephalopernicus.bsky.social · 05/10/2026
You know what, sure
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Mike Drucker @mikedrucker.bsky.social · 04/10/2026
AI COMPANIES: “People who don’t use AI agents just aren’t aware of the vast power they possess to do anything.” NORMAL PEOPLE: “Wow, okay, wow. Sounds great. What can they do? Give me your top example.” AI COMPANIES: “The hardest task of all: Checking you into a flight!”
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Justin Walsh @jstpwalsh.bsky.social · 30/09/2026
Shane Ross at Virginia Tech created a simulation of what 500k orbital data centers, as proposed by SpaceX, would look like from your home latitude sdross0.github.io/orbital-data...
sdross0.github.io
What would orbital data centers look like from your sky?
500,000 satellites from SpaceX's FCC filing, two published brightness models and the real stars, for any latitude, date and time. Computed in your browser.
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ESA Space Science @science.esa.int · 30/09/2026
Inspector Smile is ready for science! 🫡 This is Smile’s first ultraviolet view showing an auroral substorm. With the ultraviolet camera now operational, Smile becomes the first spacecraft since 2008 to capture the full ring of northern lights around the north pole in ultraviolet light. 🔭 🧪 ☀️
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Justin Bartel @cephalopernicus.bsky.social · 15/09/2026
Nothing says 'golden era of science' (or whatever the tagline is) like throwing world-class equipment in the trash.
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Justin Bartel @cephalopernicus.bsky.social · 11/09/2026
Uh, Jupiter liked the dinosaurs, so maybe this should be JUICE's mascot
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Raysident Evil @sireviscerate.myatproto.social · 07/09/2026
It was missing something.
I've added a Spaceballs helmet to the proposed Space Force uniform
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Space Telescope Science Institute @stsci.edu · 30/08/2026
Are you awake? 🥱 NASA Live coverage of the Nancy Grace Roman Space Telescope launch starts at 6:20 a.m.! Launch is scheduled for 7:26 a.m. You have time to make coffee. ☕ #NASARoman 🔭 🚀
nasa.gov
NASA Live - NASA
NASA live: Follow live television broadcasts on NASA+, the agency's streaming service, and NASA's social media channels with this schedule of upcoming live events including news briefings, launches and landings.
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Justin Bartel @cephalopernicus.bsky.social · 28/08/2026
First day off in a week, and I guess I'll keep my alarm set.
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Justin Bartel @cephalopernicus.bsky.social · 28/08/2026
Enjoyed the Saturn part of this, but two other things jumped out: @hankgreen.bsky.social says, 'important thing about the Sun isn't that it's a star, it's that Sun is a system w/ many objects' We can go further. The Sun is a star & the most important thing about *stars* is that they are systems!
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Micah @rincewind.run · 26/08/2026
there are going to be many remembrances of Tim Curry today for his brilliant work in Rocky Horror and Clue and so much more, but to me this ridiculous bit from Red Alert sums up everything that made him great you never knew what you were going to get with him, but whatever it was would be brilliant
static.klipy.com
Tim Curry: Uncorrupted Space
Alt: Tim Curry's Space gif from Red Alert
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Justin Bartel @cephalopernicus.bsky.social · 24/08/2026
On this, the 20th anniversary of Pluto's reclassification, a reminder that something can be a non-planet and still be a wildly interesting object. If you continue to call what happened in 2006 a "demotion," you're contributing to the biggest misconception in astronomy education since geocentrism.
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Don Davis @ddavisspaceart.bsky.social · 15/08/2026
During the recent Total Solar Eclipse the South Korean Danuri spacecraft obtained a nice view of Earth from Lunar orbit with the Moons shadow just visible on Earth. Here is their image, with attribution added, my colorized version and the nearly simultaneous EPIC-DSCOVR image used for the color.
This is a reduced version of the photo released today by the Korea Aerospace Research Institute. Earth is seen from Lunar orbit during the recent Total Solar eclipse. The Moon is barely showing shadows behind the sunlit surfaces, and the shadow of the Moon itself is just at the horizon, or perhaps 'Limb' better suits an orbital view. One very wide shadow shows a fuzzy edge on a distant rise. I added the attribution. This is my version of the Danuri Lunar orbiter photo, with color added.  I combined their Earth photo with a color EPIC-DSCOVR image made at about the same time, rotated a little in 3D to better match the Danuri viewing angle for compositing. The sharpness of the B&W original is preserved with the DSCOVR full Earth photo mostly used for the color values. I also prefer this orientation with the foreground Moon at the bottom.This is the EPIC (Earth Polychromatic Imaging Camera) image from the DSCOVR satellite made at close to the same time as the Danuri image, shown in reduced form but otherwise as released.
 The exposure is naturally for the sunlit Earth and clouds. The Moon shadow's wide peripheral zone of gradual darkening, the 'penumbra' is where the illumination decreases as more of the Sun is eclipsed. At this time the outermost shadow area was near the Great Lakes, from this perspective a circular zone of that radius thus surrounds the progressively underexposed zone around the Moon shadow. If the exposure were adjusted to define the actual umbra, or zone of totality,  the resulting small black dot in the image , about 30 percent the size of the underexposed portion seen here, would be surrounded by the greatly overexposed fully sunlit rest of the world.
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Dr. Raphael Marschall @spacemarschall.net · 29/07/2026
We are used to seeing weird shapes of small asteroids, but this is next level! look at the shape of 44 Nysa from Minker et al. This is 75 km volume-equivalent diameter object! Also it has a satellite! #planetSci 🧪
Residuals of R-band images of the Nysa system on 2026-
02-15 after processing with the blind deconvolution method of
Appendix A.3. The position of the satellite is marked with a pink
arrow. To improve the S/N, the deconvolution residuals were av-
eraged with a a ±5 frame sliding window. To provide scale, the
primary has been superimposed. An extended video version of
this figure and the same processing for the 2026-03-21 dataset is
available online.

Source: https://arxiv.org/pdf/2607.25786
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Luke Bones 🦴🦴 @lukemeister.bsky.social · 23/07/2026
Further work is urgently needed to constrain the population of lunar baboons.
 Photographs of (a) the lunar nearside and (b) an adult male sacred baboon, Papio hamadryas. (c) Irradiance spectrum of moonlight at 57° elevation and 91% full. (d) Median reflectance spectra of forehead hair (n = 6 individuals of each baboon species.
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Justin Bartel @cephalopernicus.bsky.social · 22/07/2026
This is like remaking Star Wars to be historically accurate.
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Justin Bartel @cephalopernicus.bsky.social · 17/07/2026
I stand by my thesis that Jupiter liked the dinosaurs. Maybe the K-Pg impactor was a match for CO chondrites. The map below shows where such objects are found in the asteroid belt- right next to a resonance with Jupiter. The impactor didn't target Earth, it was pushed! #BetterKnowAnAsteroid
seti.org
Meteorites: A Geologic Map of the Asteroid Belt
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Justin Bartel @cephalopernicus.bsky.social · 15/07/2026
Breaking: International Astronomical Union admits the existence of Flying Saucer. @iau-wgsn.bsky.social
ase.exopla.net
Flying Saucer - All Skies Encyclopaedia
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 10/07/2026
US FCC: “let’s do a consultation on how the community feels about this” Community: “we hate it, don’t do it, it’s real bad, this will impact a lot of people — astronomers, biodiversity, Indigenous communities, more” x 1800 responses FCC: “lol, we don’t care. APPROVED.”
But to expand the technology, Reflect Orbital envisions operating over 50,000 satellites by 2035, effectively surrounding the Earth with a fleet of mirrors. The proposal has faced stiff pushback from environmental groups and astronomers concerned that the satellites will unleash intrusive light pollution. The opposition has been so strong that the FCC received over 1,800 public comments on the application, many of them objecting to Reflect Orbital’s plan for Earendil-1.
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Ben Collins @bencollins.bsky.social · 09/07/2026
Elon Musk: SpaceX Will Launch People to Mars in 2024Elon Musk: Giant Rocket Could Take Us to Marks in Just 7 Years - and London in 29 MinutesCan Elon Musk Really Get Us to Mars Within 10 Years?Elon Musk Is Not a Lunatic
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Tony Dunn @tony873004.bsky.social · 06/07/2026
Asteroid Torifune was just imaged by Japan's Hayabusa 2. This asteroid is a rubble pile. If you could gently place it in the middle of a parking lot, it might look something like this. 🔭 #astro
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Justin Bartel @cephalopernicus.bsky.social · 07/07/2026
Thanks, I love it #BetterKnowAnAsteroid
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astrafoxen @astrafoxen.bsky.social · 06/07/2026
Smallest asteroid ever photographed up close, and WOW I've never seen anything like this before!! No obvious craters and very jagged shape. Just a single, 30-meter-long chunk of solid rock, unlike other asteroid visited by space probe.
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Andrew Jones @andrewjonesspace.bsky.social · 06/07/2026
Tianwen-2 had arrived. Here's asteroid Kamo'oalewa seen from 20 km away www.xinhuanet.com/20260706/eb8...
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Colin Warriner @colinelmustard.bsky.social · 05/07/2026
I think this might be one of the most incredible, unsettling and symbolic photos of today’s America I’ve ever seen. I can’t stop looking at it. From Reuters, published on the Guardian website.
Lightning strikes behind the illuminated Washington Monument, as people gather to watch 250th anniversary fireworks.
Photograph: Nathan Howard/Reuters
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Justin Bartel @cephalopernicus.bsky.social · 05/07/2026
#BetterKnowAnAsteroid
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slate @pleasebegneiss.bsky.social · 04/07/2026
they are so close to discovering global warming
Maga claims someone with trump derangement syndrome geoengineered dc heatwave
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Justin Bartel @cephalopernicus.bsky.social · 03/07/2026
We do have a few quasi-moons. They may not total 38, but small ones would be hard to see, so we can't rule it out. #BetterKnowAnAsteroid
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McSweeney's @mcsweeneys.net · 01/07/2026
"Every serious legal mind must inevitably face a fundamental choice: Read the Constitution and apply its words as the bedrock laws of the land, or transcend its tired text and interpret the super-secret invisible version that tells you exactly what you want to hear."
buff.ly
The US Constitution Is for Simple Folk Still Burdened by the Belief That Words Have Meaning
“Every serious legal mind must inevitably face a fundamental choice: Read the Constitution and apply its words as the bedrock laws of the land, or transcend ...
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Justin Bartel @cephalopernicus.bsky.social · 02/07/2026
Maybe it will happen today. (For the purposes of this post, "it" refers to someone replacing the battery in the smoke detector that's been beeping in the next apartment over for a full week now)
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NSF–DOE Rubin Observatory @rubinobservatory.org · 30/06/2026
The start of a new survey of the Universe? That deserves a new view of the cosmos 🌌 Meet the Ocean of Stars, NSF–DOE Rubin Observatory's newest wide-field image. 🔭🧪 🔗: rubinobservatory.org/gallery/imag...
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Justin Bartel @cephalopernicus.bsky.social · 30/06/2026
Happy #AsteroidDay! #BetterKnowAnAsteroid
asteroids2029.org
Asteroids2029
The web page of the International Year of Asteroid Awareness and Planetary Defence (IYAPD)
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cosmos4u.bsky.social @cosmos4u.bsky.social · 25/06/2026
The #Hayabusa2 spacecraft in its extended mission has sighted the #asteroid (98943) #Torifune which it will pass on 5 July: www.hayabusa2.jaxa.jp/topics/20260... - see also www.youtube.com/watch?v=zs34... for a recorded press conference.
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SK Winnicki, PhD 🏳️‍⚧️ @skwinnicki.bsky.social · 20/06/2026
Both totally unnecessary and extremely funny that the Guardian has an interactive graphic for you to change the color of the US flag's blue to the color of the Reflecting Pool from 8 to 19 June and counting
Screenshot of the article's graphic, showing color swatches derived from the Earthcam archive, illustration the color of the reflecting pool calibrated against satellite imagery, from 8 June to 19 June 2026. I chose yesterday, 19 June, so it rendered the US American flag with a green hue instead of blue.
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Justin Bartel @cephalopernicus.bsky.social · 21/06/2026
Some giraffes are roughly two asteroids tall #BetterKnowAnAsteroid
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Justin Bartel @cephalopernicus.bsky.social · 19/06/2026
Just skimmed the full ACM program. I'd have a #BetterKnowAnAsteroid field day at that conference. Whole sessions on interstellar objects, spacecraft dedicated to asteroids, and oddball space rocks of all sorts. Work will never pay for it, but I can start saving now for 2029
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Justin Bartel @cephalopernicus.bsky.social · 18/06/2026
Why yes, I am working on putting the asteroid's shape model in our planetarium software, why do you ask? #BetterKnowAnAsteroid
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Luke Bones 🦴🦴 @lukemeister.bsky.social · 17/06/2026
Everyone: There aren't enough hours in the day! Asteroid 2022 GQ1: I'll give you almost 9 seconds arxiv.org/abs/2606.17047
Rotation period in seconds (increasing downward) vs. estimated diameter for a large sample of asteroids, including three small Near-Earth Asteroids with rotation periods between 8.8 and 21.1 seconds.
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Andy Rivkin @asrivkin.bsky.social · 16/06/2026
Buzz Aldrin was born closer in time to when Neptune was discovered than to today.
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Derek Powazek @fraying.bsky.social · 11/06/2026
My country breaks my heart. Over and over again. www.cbc.ca/news/science...
cbc.ca
NASA scrubs promise to land first woman, first person of colour on the moon from web pages | CBC News
U.S. President Donald Trump's campaign to eliminate diversity efforts and language from government organizations has officially reached the moon, with NASA erasing references to its promise to land th...
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Justin Bartel @cephalopernicus.bsky.social · 09/06/2026
The fleeting Earth-asteroid connection will, in fact, center around Valentines Day. #BetterKnowAnAsteroid
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Andrew Jones @andrewjonesspace.bsky.social · 06/06/2026
Tianwen-2 launched just over a year ago and is expected to perform a burn tomorrow (June 7) Beijing time, setting up a rendezvous with the small, rapidly-spinning asteroid Kamo'oalewa.
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Ben Collins @bencollins.bsky.social · 02/06/2026
The money was always there for the good things.
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Andy Saunders - Apollo Remastered @andysaunders-1.bsky.social · 06/05/2026
This is incredible. The new NASA image release from #Artemis includes a sequence of 'Hello World' still photographs. I've been processing / animating them and here's what the original didn't show us: Satellites, including their solar arrays, lightning storms and dancing aurora!
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Spacepod @spacepod.bsky.social · 05/05/2026
Every day people ask me - are you more likely to be attacked by an elephant or to witness a large asteroid hitting the Earth? We did the math! Thanks James Round (www.jamesrounddesign.com) for making social media and lecture-friendly versions of Figure 1 of Nugent et al. 2025!
A graphic version of a scientific figure shows on the x-axis that the chance of a 140-m asteroid hitting the earth is more likely than the chance of an individual experiencing a sand hole collapse, a coyote attack, an elephant attack, a lightning strike, or a skydiving accident. It is less likely than carbon monoxide poisoning, a car accident, influenza, or rabies. The y-axis shows the chance of fatality if the event occurs. Although an asteroid impact can cause a wide range of fatalities (0 to billions) the other events are shown from more chance of fatality (sand hole collapse, elephant attack, lightning strike, carbon monoxide poisoning) to less likely (coyote attack, influenza, rabies).
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Justin Bartel @cephalopernicus.bsky.social · 02/05/2026
I'm irrationally angry at an unknown neighbor who put a bunch of sticks in two giant trash bags in the alley. I'd dump them out, confident that just putting the natural objects somewhere else in nature would satisfy the stupid goals of this person, but I peeked in one and other stuff's mixed in
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Justin Bartel @cephalopernicus.bsky.social · 02/05/2026
A formal cognitive test seems extreme, but maybe we could have presidential candidates appear in public debates or let them have social media accounts, so we can weed out the morons before they get elected
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