A distant galaxy is home to a ravenous supermassive black hole that appears to be playing with its food. Located over 12 million light-years from Earth, a spiral galaxy known as NGC 4945 is blowing powerful winds of material from the supermassive black hole located at its core. @LiveScience has more on this “messy eater.”
The Mysterious History of a Black Hole Has Been Decoded by Scientists : ScienceAlert…
One of the common misconceptions about black holes is that they devour not only matter, but also the history of that matter. So when a black hole forms, you can only guess how it came to be... #science #astronomy #blackholes
Jets from powerful black holes can point astronomers toward where − and where not − to look for life in the universe
> Whether a galactic environment has the right conditions for habitable planets to form could depend on how the black hole in that galaxy is rotating.
A nightly gravitational-wave candidate to start the week 
This morning at 1:35 UTC, both @LIGO detectors, together with Virgo, observed a possible new gravitational-wave signal.
If it is real, it came from the merger of two black holes. The luminosity distance is comparatively low at “just” 1.9 billion light-years.
The sky position could be determined – quite accurately – to about 27 square degrees (equivalen to 130 times the area of the full moon in the sky).
https://gracedb.ligo.org/superevents/S250331o/view/ [GraceDB] https://gcn.nasa.gov/circulars?query=S250331o [related GCN Circulars]
Friday gravitational-wave candidate 
This morning, both @LIGO instruments, together with Virgo, detected a new possible gravitational-wave signal (no. 202 in the current fourth observation run).
S250328ae – if real – came from the merger of two black holes at a (luminosity) distance of just 1.7 billion light-years. That's comparatively close.
The sky position could be determined very precisely to 14 square degrees (about 67 times the size of the full moon in the sky).
https://gracedb.ligo.org/superevents/S250328ae/view/ [GraceDB] https://gcn.nasa.gov/circulars?query=S250328ae [related GCN Circulars]
Finding Clues in Ruins of Ancient Dead Star With NASA’s Chandra https://www.nasa.gov/image-article/finding-clues-in-ruins-of-ancient-dead-star-with-nasas-chandra/ #NASA #Astrophysics #BlackHoles #ChandraXRayObservatory #Galaxies #GalaxiesStarsBlackHoles #MarshallAstrophysics #MarshallSpaceFlightCenter #TheUniverse
New gravitational-wave candidate
Both @LIGO instruments, together with Virgo, have detected the 201st possible gravitational-wave signal in their current (fourth) joint observation run, O4.
S250326y came – if it is real – from the merger of two black holes at a luminosity distance of around 20 billion light-years.
https://gracedb.ligo.org/superevents/S250326y/view/ [GraceDB] https://gcn.nasa.gov/circulars?query=S250326y [related GCN Circulars]
Zatím jen divoká hypotéza, ale podle studie dává smysl.
#space #spaceprogram #blackholes #blackhole #universe #jameswebb #jameswebbspacetelescope #JamesWebbTelescope #hypoteza #vesmir
Rotating black holes are packed with energy—here's how to unlock it
https://phys.org/news/2025-03-rotating-black-holes-energy.html
@cstross good point! 
Hm, now I'm wondering: #blackholes are described as the curvature of spacetime approaching infinity. What about *negative* infinity then? Are there theories about that? Natively, I would think that this would then be antigravity, i.e. a point that you could never reach, even if you traveled at the speed of light. #astrodon #physics
Thought experiments that fray the fabric of space-time https://www.quantamagazine.org/the-thought-experiments-that-fray-the-fabric-of-space-time-20240925
The international network of the gravitational-wave detectors has found a new gravitational-wave candidate.
S250319bu, if real, came from the merger of two black holes at a (luminosity) distance of 14.3 billion light-years.
With data from both @LIGO and Virgo detectors, the sky position could be determined to within about 2000 square degrees.
https://gracedb.ligo.org/superevents/S250319bu/view/ [GraceDB] https://gcn.nasa.gov/circulars?query=S250319bu [related GCN Circulars]
I emailed Neil Tyson Degrasse asking him if lasagna crosses the event horizon of a black hole does it become spaghetti?
Two supermassive black holes collided &merged, resulting in a newly formed black hole traveling at over 1,000 kilometers per second. This rare event offers insights into black hole dynamics & galaxy evolution!
#blackholes #astronomy #space #cosmology
www.newscientist.com/article/2470...
Two huge black holes merged in...
Postdoctoral positions in Computational Relativistic Astrophysics at our Potsdam institute
The “Computational Relativistic Astrophysics” department at the @mpi_grav in Potsdam led by Masaru Shibata announces the opening of postdoc appointments (2 years).
The department is currently composed of two group leaders, one senior scientist, and several postdoc researchers and students.
It focuses on several research topics in relativistic computational astrophysics including neutron star merger, collapsar, stellar core collapse and explosion, formation of supermassive black holes, and multi-messenger astronomy.
apply by 25 March 2025
NASA Just Found a Supermassive Black Hole Rotating the Wrong Way
https://scitechdaily.com/nasa-just-found-a-supermassive-black-hole-rotating-the-wrong-way/
Reading material for your next break 
What is so special about @LISA, the planned gravitational-wave observatory in space?
This “Einstein Online” article provides more information about the European Space Agency (ESA) mission, which is to observe Einstein's space-time ripples with a gigantic laser satellite triangle in the 2030s:
https://www.einstein-online.info/en/spotlight/lisa/
Our web portal “Einstein Online” is dedicated to Einstein’s theory of relativity and its applications. Our authors come from renowned institutions and research institutes all over the world. All articles are available in both German and English and are accompanied by numerous illustrations and animations.
