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#astrophysics

26 posts17 participants0 posts today
schuh

Since this chaos.social/@Skorpy/115037963 is getting some traction right now, I would like to alert #astrodon folks that I have created this starter pack fedidevs.com/s/NjA2/ and that you may be in it: for a *very* loose definition of Germany, it's "Astronomy in Germany".

Accounts that have opted in to discovery features can be added to starter packs without further confirmation. So if you find yourself a part of this and want me to *remove* you, please let me know and I'll try to do this quickly, before it spreads too widely.

If you think you should be on that list, but are not, because of oversight on my part, or because of missing opt-in to account discovery so far, which you would now like to change, also feel free to let me know.

The idea is to have a presentable starter pack ready at the time of #ag2025goerlitz for ag2025.astronomische-gesellsch

chaos.socialskorpy (@Skorpy@chaos.social)Hello World and ISS 🌍 🚀 🛰️
#astronomy#astrophysics#space
schuh

A message from the AG: "Join us in Görlitz for the 2025 AG Meeting – a week of inspiring talks, key strategic discussions, and splinter sessions

The German Center for Astrophysics (DZA) will host the AG Meeting in Görlitz from September 15–20, 2025, featuring:

- Prize Lectures by the 2025 recipients of the Schwarzschild Medal, the Instrument Development Award, the Ludwig Biermann Award, and the Doctoral Thesis Award.

- A Town Hall Meeting on ESO’s long-term strategy initiative Expanding Horizons – Transforming Astronomy in the 2040s, introduced by ESO Director General Prof. Xavier Barcons, and presentations of five major initiatives under preparation by representatives of the German community.

- An update on the Denkschrift strategic planning process.

Registration deadline: September 1 → Register here: indico.dzastro.de/e/ag2025 [...]"

#ag2025goerlitz#astrodon#astronomy
The Kid Should See This 🌈🪐✨

✨⭐️ The #star patterns that have guided humans for thousands of years won't stay the same forever. Every star in the night sky is moving, and over millions of years, these familiar shapes will change completely.

Astrophysicist Jackie Faherty explains how the Gaia #space observatory has mapped nearly 2 billion #stars and can project 4 million years into the #future to show how constellations like Leo, Taurus, and Scorpius will morph over time.

👉 Learn more: thekidshouldseethis.com/post/a

#tksst#video#astronomy
Nicole Sharp

Veil Nebula

These glowing wisps are the visible remains of a star that went supernova about 7,000 years ago. Today the supernova remnant is known as the Veil Nebula and is visible only through telescopes. In the image, red marks hydrogen gas and blue marks oxygen. First carried by shock waves, these remains of a former star now serve as seed material for other stars and planetary systems to form. (Image credit: A. Alharbi; via APOD)

#astrophysics#fluidDynamics#physics
Replied in thread
grobi

2008 December 11

At the Center of the Milky Way
* Credit: ESO, Stefan Gillessen (MPE), F. Eisenhauer, S. Trippe, T. Alexander, R. Genzel, F. Martins, T. Ott

Explanation:
At the center of our Milky Way Galaxy lies a supermassive black hole. Once a controversial claim, this conclusion is now solidly based on 16 years of observations that map the orbits of 28 stars very near the galactic center. Using European Southern Observatory telescopes and sophisticated near infrared cameras, astronomers patiently measured the positions of the stars over time, following one star, designated S2, through a complete orbit as it came within about 1 light-day of the center of the Milky Way. Their results convincingly show that S2 is moving under the influence of the enormous gravity of a compact, unseen object -- a black hole with 4 million times the mass of the Sun. Their ability to track stars so close to the galactic center accurately measures the black hole's mass and also determines the distance to the center to be 27,000 light-years. This deep, near-infrared image shows the crowded inner 3 light-years of the central Milky Way. Spectacular time-lapse animations of the stars orbiting within light-days of the galactic center can be found here.

apod.nasa.gov/apod/ap081211.ht

More information about the featured video in the ALT-Text

More about black holes in general here:
defcon.social/@grobi/114448092

#space#blackhole#astrophysics
Replied in thread
grobi

2014 October 26

Too Close to a Black Hole
* Image Credit & Copyright: Alain Riazuelo
www2.iap.fr/users/riazuelo/ind

Explanation:
What would you see if you went right up to a black hole? Featured is a computer generated image highlighting how strange things would look. The black hole has such strong gravity that light is noticeably bent towards it - causing some very unusual visual distortions. Every star in the normal frame has at least two bright images - one on each side of the black hole. Near the black hole, you can see the whole sky - light from every direction is bent around and comes back to you. The original background map was taken from the 2MASS infrared sky survey, with stars from the Henry Draper catalog superposed. Black holes are thought to be the densest state of matter, and there is indirect evidence for their presence in stellar binary systems and the centers of globular clusters, galaxies, and quasars.

science.nasa.gov/universe/blac
en.wikipedia.org/wiki/Henry_Dr

apod.nasa.gov/apod/ap141026.ht

#space#blackhole#astrophysics
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