cosmos4u.bsky.social
@cosmos4u.bsky.social
Reposted
A horrifically senseless death. I knew Carl as a colleague on the HST/WFPC1 and then Nuker teams. We were co-authors on some 30 papers. With his laconic wit, and calm presence he was a pleasure to work with. Words fail me...
February 20, 2026 at 4:18 AM
Reposted
How Reuters captured the photo of former Prince Andrew leaving custody - www.reuters.com/world/uk/how...
How Reuters captured the photo of former Prince Andrew leaving custody
Slumped in the back seat of his Range Rover, a visibly shaken man once referred to as the "Playboy Prince" stares ahead of him as the car leaves Aylsham police station in Norfolk, England.
www.reuters.com
February 20, 2026 at 4:05 AM
JWST Discovers the Vertical Structure of Uranus' Ionosphere: agupubs.onlinelibrary.wiley.com/doi/10.1029/... -> Webb maps the mysterious upper atmosphere of Uranus: esawebb.org/news/weic2602/ - the first vertical view of the planet’s ionosphere, revealing auroras shaped by its tilted magnetic field.
JWST Discovers the Vertical Structure of Uranus' Ionosphere
Vertical H3+ ${\mathrm{H}}_{3}^{+}$ temperature, volumetric density and total emission profiles across all longitudes are measured at Uranus for the first time Temperatures peak between 3,000 and...
agupubs.onlinelibrary.wiley.com
February 20, 2026 at 2:10 AM
Measurement of a lithium plume from the uncontrolled #reentry of a Falcon 9: www.nature.com/articles/s43... -> SpaceX rocket fireball linked to plume of polluting lithium: www.bbc.com/news/article...
Measurement of a lithium plume from the uncontrolled re-entry of a Falcon 9 rocket - Communications Earth & Environment
A plume of pollutants in the upper atmosphere above Germany is identified using lidar observations of lithium concentrations and can be traced back to the uncontrolled re-entry of a specific rocket la...
www.nature.com
February 20, 2026 at 12:52 AM
Juno's high-spatial-resolution ultraviolet observations of Ganymede's auroral patches - constraints on the magnetospheric source region: www.researchgate.net/publication/... -> Liège Scientists Reveal Similarities Between Auroras on Ganymede and Earth: www.missionjuno.swri.edu/news/univers...
(PDF) Juno's high-spatial-resolution ultraviolet observations of Ganymede's auroral patches. Constraints on the magnetospheric source region
PDF | Aims. We analyzed ultraviolet observations of Ganymede recorded on June 7, 2021, by the Juno spacecraft, which observed the aurora at high spatial... | Find, read and cite all the research you n...
www.researchgate.net
February 19, 2026 at 10:33 PM
#Starliner Propulsion System Anomalies during the Crewed Flight Test - Investigation Report: www.nasa.gov/wp-content/u... -> www.youtube.com/watch?v=gene... -> NASA Releases Report on Starliner Crewed Flight Test Investigation: www.nasa.gov/news-release...
www.nasa.gov
February 19, 2026 at 10:29 PM
HOLISMOKES XIX - SN 2025wny at z=2, the first strongly lensed superluminous supernova / XX - Lens models of binary lens galaxies with five images of Supernova Winny: arxiv.org/abs/2510.21694 / arxiv.org/abs/2602.16620 -> www.tum.de/en/news-and-...
HOLISMOKES XIX: SN 2025wny at $z=2$, the first strongly lensed superluminous supernova
We present imaging and spectroscopic observations of supernova SN 2025wny, associated with the lens candidate PS1 J0716+3821. Photometric monitoring from the Lulin and Maidanak observatories confirms ...
arxiv.org
February 19, 2026 at 10:01 PM
Tracking the Evolution of Plasma Instabilities from the Prominence–Corona Transition Region into Interplanetary Space with Total Solar Eclipse and PSP/WISPR White Light Images: iopscience.iop.org/article/10.3... -> Research finds turbulent times in the Sun’s corona: www.hawaii.edu/news/2026/02...
Tracking the Evolution of Plasma Instabilities from the Prominence–Corona Transition Region into Interplanetary Space with Total Solar Eclipse and PSP/WISPR White Light Images
Tracking the Evolution of Plasma Instabilities from the Prominence–Corona Transition Region into Interplanetary Space with Total Solar Eclipse and PSP/WISPR White Light Images, Habbal, Shadia Rifai, Shaik, Shaheda Begum, Bailey, Zachary, Alzate, Nathalia, Bandyopadhyay, Riddhi, Druckmüller, Miloslav, Di Matteo, Simone, Constantinou, Sage N. L.
iopscience.iop.org
February 19, 2026 at 9:47 PM
Detection of a giant flare displaying quasi-periodic pulsations from a pre-main-sequence M star by the Next Generation Transit Survey: academic.oup.com/mnras/articl... -> Weathering a Stellar Temper Tantrum - How space weather complicates exoplanet habitability: astrobites.org/2026/02/16/s...
Detection of a giant flare displaying quasi-periodic pulsations from a pre-main-sequence M star by the Next Generation Transit Survey
ABSTRACT. We present the detection of an energetic flare on the pre-main-sequence M3 star NGTS J121939.5–355557, which we estimate to be only 2 Myr old. Th
academic.oup.com
February 19, 2026 at 9:08 PM
Reposted
As of 3:02 PM EST, here's the fill status for the #ArtemisII Space Launch System #WDR
February 19, 2026 at 8:04 PM
Reposted
Starliner news conf upshot: NASA acknowledges poor decision making thruout Starliner prog and esp while crew was on orbit. Now correctly classified as Type A mishap. NASA still committed to Starliner, but will be leadership and other changes at NASA. Rpt out now: www.nasa.gov/news-release...
NASA Releases Report on Starliner Crewed Flight Test Investigation - NASA
At a news conference on Thursday, NASA released a report of findings from the Program Investigation Team examining the Boeing CST-100
www.nasa.gov
February 19, 2026 at 8:02 PM
Reposted
Tanking update

#ArtemisII
February 19, 2026 at 5:35 PM
Reposted
With very little notice, NASA is having a news conference today (Feb 19) at 2:00 pm ET to discuss findings from the investigation into what happened with Boeing Starliner's CFT in 2024. With Isaacman and Kshatriya. Watch on YouTube: www.youtube.com/@NASA/streams
February 19, 2026 at 5:53 PM
Reposted
Core stage appears to be fully fueled with LH2.
February 19, 2026 at 6:01 PM
Reposted
NASA is currently conducting their second Wet Dress Rehearsal ahead of Artemis II. So far the test is going very smoothly with the only notable incident being a brief communications issue on the ground side.

They have finished the LH2 load of the core stage and are nearing completion of LOX load.
February 19, 2026 at 6:12 PM
The LOFAR Two-metre Sky Survey - VII. Third Data Release: arxiv.org/abs/2602.15949 -> Largest Ever Radio Sky Survey Maps the Universe in Unprecedented Detail: www.ru.nl/en/research/...
February 19, 2026 at 3:43 PM
Reposted
This GOOD BOY ran onto the course during the Women’s Cross-Country Skiing Team Sprint event, crossing the finish line and being automatically recorded by OMEGA’s photofinish camera 😆
February 18, 2026 at 11:46 AM
Cenozoic evolution of earth’s strongest geoid low illuminates mantle dynamics beneath Antarctica: www.nature.com/articles/s41... -> Beneath Antarctica: the deep-time story behind Earth’s largest “gravity low”: www.ipgp.fr/en/news-and-... -> gizmodo.com/antarcticas-...
Cenozoic evolution of earth’s strongest geoid low illuminates mantle dynamics beneath Antarctica - Scientific Reports
Scientific Reports - Cenozoic evolution of earth’s strongest geoid low illuminates mantle dynamics beneath Antarctica
www.nature.com
February 19, 2026 at 12:18 AM
JWST Reveals a Candidate Jellyfish Galaxy at z = 1.156: iopscience.iop.org/article/10.3... -> Scientists observe distant jellyfish galaxy for first time: uwaterloo.ca/news/media/s... - new astronomical find is 8.5 billion years old and reshapes our understanding of early cosmic evolution.
February 18, 2026 at 7:06 PM
ALMA and JWST Identification of Faint Dusty Star-forming Galaxies up to z ∼ 8 and Their Connection with Other Galaxy Populations: iopscience.iop.org/article/10.3... -> Team finds previously unknown dusty, star-forming galaxies almost 13 billion years old: www.umass.edu/news/article...
ALMA and JWST Identification of Faint Dusty Star-forming Galaxies up to z ∼ 8 and Their Connection with Other Galaxy Populations
ALMA and JWST Identification of Faint Dusty Star-forming Galaxies up to z ∼ 8 and Their Connection with Other Galaxy Populations, Zavala, Jorge A., Faisst, Andreas L., Aravena, Manuel, Casey, Caitlin M., Kartaltepe, Jeyhan S., Martinez, Felix, Silverman, John D., Toft, Sune, Treister, Ezequiel, Akins, Hollis B., Algera, Hiddo, Barboza, Karina, Battisti, Andrew J., Brammer, Gabriel, Cai, Zheng, Champagne, Jaclyn, Drakos, Nicole E., Egami, Eiichi, Fan, Xiaohui, Franco, Maximilien, Fudamoto, Yoshinobu, Fujimoto, Seiji, Gillman, Steven, Gozaliasl, Ghassem, Harish, Santosh, Jin, Xiangyu, Kakiichi, Koki, Kakkad, Darshan, Koekemoer, Anton M., Lin, Ruqiu, Liu, Daizhong, Long, Arianna S., Magdis, Georgios E., Manning, Sinclaire, Martin, Crystal L., McKinney, Jed, Meyer, Romain, Rodighiero, Giulia, Salazar, Victoria, Sanders, David B., Shuntov, Marko, Talia, Margherita, Tanaka, Takumi S., Wang, Feige, Wang, Wuji, Wilkins, Stephen M., Yang, Jinyi, Yun, Min S., The CHAMPS and COSMOS-Web collaborations
iopscience.iop.org
February 18, 2026 at 7:03 PM
Candidate Dark Galaxy-2 - Validation and Analysis of an Almost Dark Galaxy in the Perseus Cluster: iopscience.iop.org/article/10.3... -> NASA’s Hubble Identifies One of Darkest Known Galaxies: science.nasa.gov/missions/hub...
Candidate Dark Galaxy-2: Validation and Analysis of an Almost Dark Galaxy in the Perseus Cluster
Candidate Dark Galaxy-2: Validation and Analysis of an Almost Dark Galaxy in the Perseus Cluster, Li, Dayi (David), Liu, Qing, Eadie, Gwendolyn M., Abraham, Roberto G., Marleau, Francine R., Harris, William E., van Dokkum, Pieter, Romanowsky, Aaron J., Danieli, Shany, Brown, Patrick E., Stringer, Alex
iopscience.iop.org
February 18, 2026 at 3:53 PM
Reposted
The shadow of the Moon skirting Earth's shadow during yesterday's (February 17 2026) annular solar #eclipse, passing quickly across the southwest Indian Ocean from Antarctica, over Kerguelen Islands before disappearing towards the northwest. Seen by GEO-KOMPSAT.
February 18, 2026 at 10:42 AM
Reposted
Good to see the Ådalen meteorite finally getting its place in the sun - the first iron meteorite with an orbit! (Moilanen et al., arxiv, submitted) Now that the ownership issue has been fully resolved by Swedish courts (the finders won!), the meteorite is available for scientific study. ☄️🪐🇸🇪
The First Instrumentally Documented Fall of an Iron Meteorite: atmospheric trajectory and ground impact
Iron meteorite falls are rare compared to stony meteorites, and until recently no iron meteorite had a reliably determined pre-atmospheric orbit. This changed on 2020 November 7, when a bright firebal...
arxiv.org
February 18, 2026 at 6:18 AM
Reposted
Starting this Friday, four separate #JWST programmes will be exploring physical processes in Jupiter's atmosphere and ionosphere. We're asking amateur astronomers to help provide context imaging over the next few weeks to understand how the atmosphere is changing with time. #planetaryscience
February 17, 2026 at 6:12 PM
Reposted
158 first-gen Starlinks have now relocated from the 547 km/53 deg shell to the 475 km/53 deg shell. About another 180 are on the way down still.
February 16, 2026 at 5:47 PM