Kelly Lepo @kellylepo.bsky.social · 7hMy first thought when looking at this: very cool, but what planet is it? It's the Earth🤦♀️ Why does the Earth look smooth and featureless, other than the auroral ring? It's because Smile is an ultraviolet telescope, and Earth's atmosphere is opaque at ultraviolet wavelengths shorter than ~300 nm. 3325
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 29/09/2026Astronomers theorize that the black hole at the center of Centaurus A influences the region as it feeds and launches powerful outflows. Learn more about the impact of its central black hole with a printable poster of this observation from #NASAWebb: go.nasa.gov/4hwsDlf 04714
Reposted by Kelly LepoESA Space Science @science.esa.int · 28/09/2026A successful Earth flyby improves Juice’s course to Jupiter Earlier today, Juice flew just 8640 km above the Indian Ocean and snapped these images with its onboard monitoring cameras. 1️⃣Africa, by Juice monitoring camera 2️⃣Madagascar, by Juice NavCam 3️⃣Moon, by Juice NavCam 🔭 🧪 #planetsci 7345100
Reposted by Kelly LepoPRIMA probe @prima-probe.bsky.social · 28/09/2026PRIMA has been selected as NASA's first Probe Explorer mission! www.nasa.gov/news-release... 2174
Reposted by Kelly LepoDaniel Clery @danclery.bsky.social · 22/09/2026Giant telescope project rejects La Palma as backup site | Science | AAAS 🔭🧪 @science.org www.science.org/content/arti...science.orgGiant telescope project rejects La Palma as backup siteU.S.-led Thirty Meter Telescope declines €1 billion Spanish offer to build the observatory on the Canary Islands 43310
Reposted by Kelly LepoSTARtorialist @startorialist.com · 26/09/2026New Roman Space Telescope designs from Cepheid Studios have recently launched! Pin (shown below), necklace, earrings, and cufflinks in three colors of shiny acrylic, laser-cut with solar (and goat) power in France! shop.startorialist.com/products/nan... Psst @nancyromansci.bsky.social 🤩shop.startorialist.comNancy Grace Roman Space Telescope Acrylic PinWiden your gaze with carefully crafted pin representing the Nancy Grace Roman Space Telescope, scheduled to launch on 30 August 2026! This version is an approximate scale of 1:2000, perfect for celebr... 154
Kelly Lepo @kellylepo.bsky.social · 25/09/2026One of my physics professors needed a source of alpha particles. Rather than buying it through official channels, he just brought a bunch of smoke detectors on eBay for their americium. So, if you showed up to an interview at his lab with an ionizing smoke detector, it might be a plus. 192
Reposted by Kelly LepoSean Richards | Toitū Te Tiriti | they/she @ordinarystarman.com · 23/09/2026can't believe I get to say this, but I'm now officially Dr Sean Richards! I got profiled by the University website on my journey -- "from gamer to stargazer", and being the first Sāmoan physicist from the University of Auckland. www.auckland.ac.nz/en/news/2026...auckland.ac.nzFrom gamer to stargazer: first Sāmoan astrophysicist graduates with PhD – University of AucklandDr Sean Richards' research helps astronomers more accurately model the formation of neutron stars and other extreme cosmic phenomena. 9879
Reposted by Kelly LepoC @spiffyscientist.bsky.social · 20/09/2026I won’t lie, it’s a bit overwhelming to see the work hyperbolized by many press outlets, including the university. We did not discover a new organ, or that you have two consciousnesses, etc! I’m excited for the general positive recognition, (especially the coverage from the Chronicle by Jack Lee)sfchronicle.comThe brain is a single organ. But it may not start that way, study suggestsA Stanford-led study challenges the idea that the brain develops from one common pool of early cells — and could help researchers model diseases such as ALS. 523477
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 15/09/2026This starry view of the nearby star-forming region IC 348 sits just 1,000 light-years away in the constellation Perseus. Cold clouds of molecular hydrogen gas collapse to form new stars, creating glowing, sculpted scenes like this one. (1/5) 🧵 🔭 317037
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 15/09/2026#NASARoman activated the Wide Field Instrument—a 300-megapixel infrared camera that will allow it to explore wide swaths of the cosmos quickly. This test image captures the very first photons of starlight to reach the instrument—taken as an initial performance assessment: go.nasa.gov/4rg4qEc 8327107
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 15/09/2026“As a result of exquisite planning by our orbital dynamics team, brilliant execution by the operations team, and a precise launch from SpaceX, Roman has fuel for at least 22 years of potential science operations,” said Jamie Dunn, center director at NASA’s Goddard Space Flight Center. #NASARoman 🔭 science.nasa.govFuel Savings Double Potential Lifetime for NASA's Roman Mission - NASA ScienceThe results are in: NASA's Nancy Grace Roman Space Telescope's very accurate first mid-course correction, along with other fuel savings, are expected to more 216549
Reposted by Kelly LepoUS National Gemini Office @usngo.bsky.social · 11/09/2026This week’s image is of the comet C/2025 K1 ☄️! Gemini’s GMOS-N captured this image, where you can see the comet's main body right beside two fragments that broke off! Check out the 🧵 for another paper. #Astronomy 📸 in thread 14710
Reposted by Kelly LepoUS National Gemini Office @usngo.bsky.social · 04/09/2026Six Hawaiʻi Island students helped bring a new Gemini North image to life! They selected the interacting galaxies NGC 7253 and gave them this Hawaiian name: Nā ʻUhane Māhoe Huki Pū i ke Ola, “The Twin Spirits Pulling Together Creating Life” #astronomy 📷 Gemini Observatory/NOIRLab/NSF/AURA 04212
Reposted by Kelly LepoESA Space Science @science.esa.int · 03/09/2026A happy goodbye is still a goodbye 🥹 Mission accomplished, MTM! 🫡 Thank you for the ride! Thanks to its solar-powered electric thrusters, MTM carried ESA's Bepi and JAXA's Mio to Mercury on the power equivalent of 250 ants! 🐜🐜🐜 🔭 🧪 #planetsci 1/3 113529
Reposted by Kelly LepoPhil Plait @philplait.bsky.social · 03/09/2026This is good news! BepiColombo is a cool mission to orbit Mercury and will be there in less than three months. It flew there as two connected spacecraft, and they just separated successfully! www.science.esa.int/bepicolombo 314019
Reposted by Kelly LepoSarah Hörst @planetdr.bsky.social · 03/09/2026Nice Dragonfly update including the recently approved name of the dune field where we will land We’re going to Ahmakiq undae. go.nasa.gov/4zTQdAAgo.nasa.govNASA’s Dragonfly Gets Wired Up While Titan Landing Area Is Named - NASA SciencePeeking into the clean room at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, it might be one of the first things you notice about 314135
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 01/09/2026The Nancy Grace Roman Space Telescope team has successfully activated the mission’s Coronagraph Instrument, which will block starlight to view planets and dusty disks around nearby stars. #NASARoman 🔭 science.nasa.govNASA Roman's Planet Imager Has Powered On - NASA ScienceNASA's Nancy Grace Roman Space Telescope team has successfully activated the mission's Coronagraph Instrument, which will block starlight to view planets and 531579
Reposted by Kelly LepoNSF–DOE Rubin Observatory @rubinobservatory.org · 01/09/2026We need your eyes! 🖥️ Introducing Rubin: Blobs and Blurs, a new citizen science project using NSF–DOE Rubin Observatory data. 🔭🧪 We’re on the hunt for faint, blurry galaxies that are dominated by invisible dark matter & often hard for computers to identify. zooniverse.org/rubin 05726
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 31/08/2026At 12:02 p.m. EDT, the Nancy Grace Roman Space Telescope began an approximately 3-minute mid-course correction burn to adjust its trajectory toward its final orbit. #NASARoman 🔭 science.nasa.govNASA's Roman Completes First Mid-Course Correction Burn - NASA ScienceAt 12:02 p.m. EDT, Roman began an approximately 3-minute mid-course correction burn to adjust its trajectory toward its final orbit. 116341
Reposted by Kelly LepoDaniel Pomarède @pomarede.bsky.social · 30/08/2026in case you missed it: Roman spacecraft separation #Roman 🔭🧪 419456
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 29/08/2026Impress your family with trivia about the Nancy Grace Roman Space Telescope while you wait to watch the launch on Sunday morning! #NASARoman 🔭 science.nasa.gov9 Things to Know About NASA's Nancy Grace Roman Space Telescope - NASA ScienceNASA's Nancy Grace Roman Space Telescope is set to launch at 7:26 a.m. EDT on Sunday, Aug. 30. While you wait to watch the launch, brush up on some key facts 010339
Reposted by Kelly LepoCeleste Labedz @celestelabedz.bsky.social · 28/08/2026Lots of things suck lately, but also there's a partial lunar eclipse tonight! Go look! Partial begins at 10:34 PM eastern time, when it'll look like the Moon has a little bite out of it. The peak is 12:13 AM; it's 96%, so it should look reddish! www.timeanddate.com/eclipse/luna...timeanddate.comPartial Lunar Eclipse on August 27–28, 2026 – Where and When to SeePartial lunar eclipse on August 27–28, 2026: Where and when is the Moon eclipse visible and what will it look like? Visibility map, animation, and local times. 05814
Reposted by Kelly LepoJason Perry @volcanopele.bsky.social · 27/08/2026Ontario Lacus is a hydrocarbon lake near the south pole of Saturn’s moon Titan. Measuring 235 kilometers long by 75 kilometers across, Ontario Lacus is slightly smaller than its terrestrial counterpart, Lake Ontario. Lakes on Titan are named after lakes on Earth that are roughly the same size. 717358
Reposted by Kelly LepoAstrobites @astrobites.bsky.social · 28/08/2026From @anaviuppal.bsky.social: In 2019, CHIME detected a very unusual fast radio burst (FRB) signal that excited the astronomical community. However, it turns out that the signal wasn’t from an FRB after all… ⚛️ 🔭 ☄️ 🧪 astrobites.org/2026/08/21/chime-misclassification/astrobites.orgEverything Going Wrong, All at Once: Pulsar Misclassified as a Fast Radio BurstIn 2019, CHIME detected a very unusual fast radio burst (FRB) signal that excited the astronomical community. However, it turns out that the signal wasn’t from an FRB after all… 0214
Reposted by Kelly LepoSaavik ‘Careful of the Ankle’ Ford @saavikford.bsky.social · 26/08/2026As a certified astrophysicist, let me just assure you: THIS IS COMPLETELY UNHINGED. 17869
Reposted by Kelly LepoESO @eso.org · 20/08/2026Over the past days, unusually severe weather has affected northern Chile, where our observatories are located. This brought snow to Paranal and to the ELT construction site. It left stunning images, while causing severe flooding and damage to several cities within the Antofagasta Region. 🔭 1/2 116059
Reposted by Kelly LepoAstronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · 15/08/2026This is a pleasing factoid: the Nancy Grace Roman space telescope is the same size and weight as a T-Rex! Countdown: 15 days to launch! 🚀 AUG 30, 2026 11:26 UTC ℹ️: science.nasa.gov/mission/roma... 1025584
Reposted by Kelly LepoDon Davis @ddavisspaceart.bsky.social · 15/08/2026During 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. 114953
Reposted by Kelly LepoJennifer Ouellette @jenlucpiquant.bsky.social · 14/08/2026How Two Medieval Scholars Used an Eclipse to Measure Longitude www.medievalists.net/2026/08/how-...medievalists.netHow Two Medieval Scholars Used an Eclipse to Measure Longitude - Medievalists.netA lunar eclipse allowed two medieval scholars working 1,500 kilometres apart to calculate the longitude difference between Baghdad and Khwarezm. 1249
Kelly Lepo @kellylepo.bsky.social · 12/08/2026The best part of a solar eclipse: scrolling through and liking everyone's eclipse photos after the event.static.klipy.comHomer Simpson's Sweet Adventure in Candy LandAlt: Homer Simpson skipping happily in a line with chocolate bunnies in a fantasy landscape made of candy. 1190
Reposted by Kelly LepoEUMETSAT @eumetsat.int · 12/08/2026Where were you when the #eclipse hit today? 🌖✨ While millions watched from the ground across Europe, we had a view from space. 🛰️ Did you catch the total or partial eclipse where you are? Let us know in the comments - and check back tomorrow for more imagery and information! 💬 69638
Reposted by Kelly LepoNational Weather Service @nws.noaa.gov · 12/08/2026Those in the U.S. may only see a sliver of today's solar eclipse, but GOES-EAST gets a great view of the shadow as it crosses into Europe! 🌑 3396119
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 11/08/2026TONIGHT at 7 pm ET: Scientists will discuss the engineering behind #NASARoman’s lift-off and the path to its final destination, as well as the science potential to survey the heart of our Milky Way galaxy and find a variety of objects—including isolated black holes—using innovative techniques.youtube.comNASA's Nancy Grace Roman Space Telescope: Countdown to ExplorationYouTube video by Space Telescope Science Institute 0283
Reposted by Kelly LepoEuropean Space Agency @esa.int · 10/08/2026🆕 This NASA/ESA/CSA James Webb Space Telescope image shows planetary nebula NGC 2392, nicknamed the 'Lion Nebula'. This near- and mid-infrared composite image reveals the complex structure of the nebula 🧪🔭 esawebb.org/images/weic2... @science.esa.int @stsci.edu 522655
Reposted by Kelly LepoSpace Telescope Science Institute @stsci.edu · 10/08/2026#NASAWebb imaged the Lion Nebula in near- and mid-infrared light just in time for #WorldLionDay. The stellar core, looking like the lion’s “nose,” is responsible for sculpting the nebula’s complex gas and dust structures: news.stsci.edu/4x639kM 212948
Reposted by Kelly LepoSeven Machina Rasmussen @toomanyspectra.bsky.social · 04/08/2026HAPPY BOOK DAY TO ME 💞📚✨🥰 4378
Reposted by Kelly LepoCanadian History Ehx @cdnhistoryehx.bsky.social · 01/08/2026On this day in 1905, Helen Sawyer Hogg was born. As an astronomer, she pioneered research into globular clusters and variable stars. She also inspired many to pursue science through her Toronto Star column With the Stars, that ran from 1951 to 1981. 📸 University of Toronto 17518
Reposted by Kelly LepoChris Lintott @chrislintott.bsky.social · 30/07/2026I see @xkcd.com got ahold of my to do list: xkcd.com/3278 (Adding to my status as 'Most Distracted Astronomer', I'm actually working on a surprising number of these) 🔭xkcd.comVera Rubin Observatory 918923
Reposted by Kelly LepoMike Brown @plutokiller.com · 29/07/2026This is a super cool paper (and last chapter of her PhD thesis) from my now-graduated student @import-astrory.bsky.social I would explain more but, really, the headline kind of does the job.caltech.eduNeptune's Inner Moons May Be Shattered Remains of Ancient Icy WorldsNew findings from Caltech researchers suggest Neptune's smallest satellites formed from the shattered remains of an original moon system that was destroyed when Triton was captured by Neptune's gravit... 38525
Reposted by Kelly LepoPhil Plait @philplait.bsky.social · 29/07/2026This oxygen emission line can only occur in very rarefied gas: if atoms collide enough it deexcites the electron and you don't get the line. It took a long time to figure that out (it's very hard to get such low density oxygen in the lab), and the ubiquity of this line baffled them for many years. 313923
Kelly Lepo @kellylepo.bsky.social · 27/07/2026Stopped by the Smithonian Air and Space museum this weekend to say hi to the Hubble model. I also got to see the backup mirror (that was not ground to the wrong curvature) and the actual Hubble WFPC2 instrument that astronauts returned from space. 2150
Reposted by Kelly LepoNSF–DOE Rubin Observatory @rubinobservatory.org · 24/07/2026Talk about a cosmic glow-up✨📸 This progression of images of galaxy group RSCG 55 shows the evolution of ground-based sky surveys spanning more than three decades🤯, ending with NSF–DOE Rubin Observatory's view. 🔭🧪 925490
Reposted by Kelly LepoMark Marley @markmarley.bsky.social · 23/07/2026Not only is Kayla investigating brown dwarf atmospheres with me, she also developed a program for students in juvenile detention in Tucson. 1184
Reposted by Kelly LepoThe Astro Society @astrosociety.org · 23/07/2026In 5 days, join the NASA Night Sky Network + our staff for a FREE webinar on International Observe the Moon Night!🌖🌝 Tuesday, July 28, 6:00pm PT/9:00pm ET: experienced event hosts will discuss this global observing program, how you can get involved, & program resources available this year. 154
Reposted by Kelly LepoBarbara Ryden @bsryden.bsky.social · 22/07/2026I always say that stars are failed brown dwarfs. "Oh no! I've accreted too much gas! My precious hydrogen is being consumed from within!! Horror of horrors!!!" 2194
Reposted by Kelly LepoESO @eso.org · 22/07/2026That's no moon. It's a...hang on, what should we call it? 🤔 Our VLT has revealed evidence for a moon-like object in the CD-35 2722 system. Yet this new ‘exomoon’ detection is challenging cosmic labels! 🔭 🧪 #exoplanets 1/4 511037
Reposted by Kelly LepoGordon "Oz" Osinski @drcrater.bsky.social · 20/07/2026A nice article about how an amateur astronomer, Joël Lapointe, led to the discovery of a new meteorite impact crater in Quebec 🇨🇦 and how on our recent expedition we were able to confirm it #impactearth @westernuspace.bsky.social @westernuearth.bsky.social ca.news.yahoo.com/pit-found-qu...ca.news.yahoo.comPit found by Quebecer confirmed to be a 390-million-years-old meteorite impact craterMONTREAL — In late 2023, amateur astronomer Joël Lapointe was using Google Maps to plan a summer road trip when he stumbled upon a strange looking pit. 064