🚨 Beyond the limit 🚨
New ESO study finds that current proposals to launch 1.7+ million satellites into orbit would have devastating consequences for astronomy.
The most extreme proposals come from SpaceX & Reflect Orbital
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📷 F. Kamphues, ESO/M. Kornmesser
#astrodon #astronomy #astrophysics #space #science #environment #pollution
Jonathan's Space Report issue no. 857 has been published at planet4589.org/jsr.html
planet4589.org/jsr.htl
From a mountaintop in Chile the Vera C. #Rubin Observatory has finally begun the revolutionary Legacy Survey of Space and Time (LSST): https://noirlab.edu/public/news/noirlab2616/ - the ten-year survey is Rubin’s signature campaign to create the most comprehensive, cinematic record of the Universe in history.
🔊Cease your doomscrolling & start sky-surfing across @vrubinobs.bsky.social@bsky.brid.gy new "ocean of stars"! Behind all those sparkles are magical swirling galaxies & I've been having such a lovely time zooming in on them. I think you should too (slow to load but worth the wait) 🤗 🔭 🧪
👉 skyviewer.app/explorer
RE: https://bsky.app/profile/did:plc:s2ejrhufb4wl2y5cvipah5au/post/3mpjbmaturs2u
Sometimes, things we see in the sky aren't what we think they are.
Sometimes those mistakes are funny.
Sometimes they interfere with your love life.
Today, June 30, is Asteroid Day. On this UN designated day, events are held globally to educate the public and to raise awareness about asteroids, and about the science of defending our planet from future asteroid impacts. June 30 marks the date of Earth’s largest asteroid impact in recorded history, the Siberia Tunguska event, in 1908.
The CRASH Clock paper is now peer-reviewed! So to celebrate, my co-authors and I wrote an explainer article (because how better to celebrate one article than by writing another... oh academia...)
It's now published in The Conversation Canada: https://theconversation.com/a-new-crash-clock-measures-the-chance-of-satellite-collisions-and-its-ticking-down-fast-283481
Rough Terrain on Rosetta Destination Comet
Some relatively rough terrain on the nucleus of comet 67P/Churyumov-Gerasimenko appears in this image taken by the navigation camera on the European Space Agency Rosetta spacecraft in the second half of October 2014.
More: https://images.nasa.gov/details/PIA18869
Credit: ESA/Rosetta/NAVCAM
#comet #rosetta #astrodon #astronomy #astrophotography #astrophysics
#3265 - Asteroid Threat
Ice Volcanoes and Topography
Scientists using New Horizons images of Pluto's surface to make 3-D topographic maps have discovered that two of Pluto's mountains, informally named Wright Mons and Piccard Mons, could possibly be ice volcanoes. The color is shown to depict changes in elevation, ...
More: https://images.nasa.gov/details/PIA20050
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
#pluto #newhorizons #astrodon #astronomy #astrophotography #astrophysics
The person who wrote the headline understood the assignment.
“The 13 billion years that led to us – a cosmological timelapse”
https://aeon.co/videos/the-13-billion-years-that-led-to-us-a-cosmological-timelapse
We are all stardust.
The oxygen you breath? That comes from dying massive stars, ending their life in a supernova.
The iron in your blood? Some from massive stars dying, but mainly fron white dwarfs, the leftovers of dwarf stars like our own Sun, exploding.
Carbon, the basis of life? Mostly from dying low mass stars.
The gold ring on your finger? Mostly from merging neutron stars, leftovers from supernovae.
LAUNCH at 0225 UTC Jun 29 of a Falcon 9 from Canaveral with SiriusXM's SXM-11 geostationary digital radio satelite, built by Lanteris, with a launch mass about 7000 kg
A NIGHT AT THE OPERA is, in my opinion, a masterpiece. https://letterboxd.com/andrewmoxon/film/a-night-at-the-opera/
A replica Roman odometer. At the end of each Roman mile, a gear wheel releases a metal or hardwood ball into a box causing a quite loud noise. The balls in the box are counted when the desired point is reached.
More information and credits:
https://en.wikipedia.org/wiki/File:2012-08-17_Hodometer_anagoria.JPG
Two papers by Max Planck, the legendary Nobel laureate in physics, were retracted by Springer Nature in 2011, likely due to an algorithm flagging the papers for self-plagiarism and copyright infringement. Read on for how stupid it all is.
LAUNCH of Starlink Group 17-40 at 1609 UTC Jun 28