astronomy
Mercury is weird because of a 'hit-and-run' incident in its youth
Books about the planet Mercury at PG
https://www.gutenberg.org/ebooks/search/?query=Mercury+%28planet%29&submit_search=Search
APPARENT MAGNITUDES OF THE SUN, AS SEEN FROM THE DIFFERENT PLANETS. - from the book "Letters on Astronomy" by Denison Olmsted (1855)
Ideas ‘of pure genius’ – how astronomers have measured the Universe across history
by Terence Tao and Grant Sanderson
Which famous authors might go to space? (A chart.)
And which ones would write an interesting account of their trip?
By James Folta
https://lithub.com/which-famous-authors-might-go-to-space-a-chart/
#OnThisDay, 9 May 1922, the International Astronomical Union formally adopts Annie Jump Cannon's stellar classification system. The principles in it still underpin modern classification.
#WomenInHistory #OTD #History #WomensHistory #Astronomy #WomenInSTEM #AmericanHistory #Histodons
These Scientists Say They’ve Identified the Oldest Known Star Chart in the World
A new preprint suggests that an ancient Chinese star catalog dates to 355 B.C.E. But other researchers aren’t convinced, arguing that the original coordinates are misaligned by one degree
By Sonja Anderson
Astronomy-History at PG:
https://www.gutenberg.org/ebooks/subject/891
You only die twice:
Recent theoretical models suggested that some stars could destroy themselves in two, successive supernova explosions. Now we have direct visual evidence that such doubled stellar deaths really happen.
https://www.eso.org/public/news/eso2511/ #space #astronomy #science #nature
Ancient Egyptian Drawing Now Theorized To Represent the Milky Way’s Great Rift
By Livia Pereira
Original paper:
https://www.sciengine.com/JAHH/doi/10.3724/SP.J.140-2807.2025.01.06
Astronomy-History at PG:
https://www.gutenberg.org/ebooks/subject/891
Woah! Really cool new videos from the Goode Solar Telescope at Big Bear Solar Observatory show timelapse adaptive optics views of the Sun's corona. This one is of a solar prominence being shaped by the Sun’s magnetism.
I like the choice to color hydrogen-alpha light pink.
You should check out all of the videos (the Sun is so fluffy!):
https://nso.edu/press-release/new-adaptive-optics-shows-stunning-details-of-our-stars-atmosphere/
An object called 2017 OF201 is shaking up our ideas about the outer zone of our solar system.
It follows an extreme, 25,000-year orbit.
It may be one of a hundred or so similar bodies filling a seemingly vacant region.
And its existence casts doubt on searches for Planet 9.
https://www.ias.edu/news/extreme-cousin-pluto-possible-dwarf-planet-discovered-solar-systems-edge #space #science #nature #astronomy
The light beyond sight
Only a tiny sliver of the Universe’s light can be seen by human eyes. But today we’re catching glimpses of the invisible
By Corey S Powell
Herschel at PG:
https://www.gutenberg.org/ebooks/search/?query=william+herschel
#PNW #Washington #NLC #Clouds #Night #WaWx #Nature #Photo #PhotoOfTheDay #Astronomy #Space #SpaceWeather #Science #sciencemastodon
An amateur astronomer may have just spotted the first known comet (or asteroid) impact on Saturn.
We've seen impact flashes on the Moon & Jupiter, but this would be by far the most distant one yet observed. 🧪🔭
https://earthsky.org/space/did-space-rock-hit-saturn-photo/ #space #science #nature #astronomy
NASA's Parker Solar Probe made the closest-ever studies of the Sun -- and got this unprecedented look at multiple solar eruptions piling up on top of each other.
https://science.nasa.gov/science-research/heliophysics/nasas-parker-solar-probe-snaps-closest-ever-images-to-sun/ #space #science #nature #astronomy #nasa
PRESS RELEASE: https://www.seti.org/news/skymapper-and-seti-institute-team-up-to-map-the-entire-sky-all-the-time/
Today, the SETI Institute announced a strategic collaboration with SkyMapper, the world’s leading decentralized global astronomy and space science network. Together, they plan to deliver continuous, real-time astronomical data to scientists, educators, and enthusiasts worldwide.
Astronomers Detect a Black Hole Merger That’s So Massive It Shouldn’t Exist
https://gizmodo.com/app/uploads/2025/07/black-hole-merger.jpg
First celestial image unveiled from revolutionary telescope
A powerful new telescope in Chile has released its first images, showing off its unprecedented ability to peer into the dark depths of the universe.
https://www.bbc.com/news/articles/cj3rmjjgx6xo
Telescopes at PG:
https://www.gutenberg.org/ebooks/subject/2331
Last year, astronomers detected a fast radio burst that got them excited as to a new discovery, but confused them as to the signal's power
When they pinpointed the signal it turned out to be... a #NASA satellite that died in 1964
They have some good theories as to how the zombie satellite fired off some signals but us #StarTrek fans know what's going on
V'GER
https://phys.org/news/2025-06-mysterious-fast-radio-dead-nasa.html
What are dwarf planets — and how many are there?
https://www.livescience.com/space/astronomy/what-are-dwarf-planets-and-how-many-are-there
Pluto
🚨 Astronomers have witnessed the dawn of a new solar system!
Using ALMA and JWST they observed the first specks of planet-forming material — hot minerals beginning to solidify around HOPS-315, a baby star 1300 light-years away.
This marks the first time a planetary system has been identified at such an early stage in its formation – a window to the past of our own Solar System.
https://www.eso.org/public/images/eso2512a/
#astrodon #astronomy #astrophysics #space #science
📷 ALMA(ESO/NAOJ/NRAO)/M. McClure et al
New instance, new #introduction !
Hi #fediverse ! We’re the European Southern Observatory, and we design, build and operate ground-based telescopes.
One of them is our Extremely Large Telescope, currently under construction in #Chile. It will have a 39 m mirror, and its rotating enclosure will weigh 6100 tonnes, or about 700 mastodons!
We’re looking forward to chatting with all of you about #astronomy
And many thanks to @sebinthestars for running our former instance!
📷 ESO/G. Vecchia
#Travel #Photography #Cruise #SciFi #BadMovies #RugbyLeague #NFL #Patriots #MST3K #Architecture #Brutalism #ArtDeco #Science #Astronomy #Archaeology #History #Portsmouth
Ignore this post. I need to pin my bio hashtags in a post because the bio links frustratingly break out of the advanced web view in this Mastodon build and they're my shortcut way of browsing posts. Hoping they fix this in a later build.
Early visions of Mars: Meet the 19th-century astronomer who used science fiction to imagine the red planet
Parisian astronomer Camille Flammarion brought used science fiction to bring Mars to life
By Matthew Shindell
Camille Flammarion at PG:
https://www.gutenberg.org/ebooks/author/8763