A spherical shell-like structure 1 billion light-years in diameter named Ho’oleilana is discovered in the distribution of relatively nearby galaxies. We posit this is the 1st observation of an individual Baryon Acoustic Oscillation (BAO).
"A brief history of time" by Stephen Hawking is probably the most influential semi-popular #science book ever written in #physics, #astrophysics, #cosmology , one that brought generations of students into these fields.
Do you know of any equivalent books in other fields of science, STEM or other ? Reply ⬇️
Boosting will make everybody on #Mastodon smarter !
Small thread to show the obvious yet powerful concept that any simulator in theoretical #astrophysics (and beyond) uses on a regular basis:
simulations allow us to repeat the same scenario multiple times, and investigate the specific effect of single mechanisms, which may not be trivial to do in non-linear systems.
Take this beautiful radio galaxy in the Hydra cluster of galaxy.
The lobes inflated by jets go nearly vertically.
New #AstroPhysicsFactlet
The Universe, beyond our Galaxy, continuously irradiates our planet with any sort of "astrophysical backgrounds", which are the cumulative radiations emitted from all sort of things happening in the Universe - from active galactic nuclei, to exploding stars, to the thermal emission from the Big Bang (CMB) etc.
What is the total power received by our planet at every second?
And how large is the power collected by our telescopes?
It’s now thought that they could illuminate fundamental questions in #physics, settle questions about #Einstein’s theories, & even help explain the #universe.
…In recent yrs, the amt of data that scientists have discovered about black holes has grown exponentially.
1/ Most massive stellar #BlackHole in our galaxy found! With 33 times the mass of the Sun, this is the most massive black hole formed after the collapse of a star that we've found so far in the #MilkyWay.
ESA's Gaia mission found it via the wobble it induces on a star orbiting it, and data from ground-based telescopes helped confirm its mass and elucidate how it formed.
La cassette du vélo de mon fils ne tourne pas sur son axe, on dirait Pluton par rapport à l'écliptique #astrophysics , voire même un ruban de Möbius. Que dois-je faire ?
"Almost all the satellites you can see with your eyes now are Starlinks. Nicely demonstrated in this awful/beautiful photo: https://apod.nasa.gov/apod/ap220614.html "
Thank you Prof. Lawler for continuing to remind the world of the catastrophe unfolding in low earth orbit.
• #DarkMatter was first theorized in the 📆 1930s to explain movements of #stars 🎇 and #galaxies 🌌 that couldn't be explained by Newton's laws of gravity.
#Papertime! 🌌 💫 📡 (From Monday, but I totally did not have the time to post this before ...)
"The first mm detection of a neutron star high-mass X-ray binary" led by the amazing J. van den Eijnden, including @fuerst, @pkretsch, yours truly et al.
MNRAS submitted (not yet refereed).
Cecilia Payne-Gaposchkin, who revolutionized our understanding of what stars & the Universe are made of, was born #OTD in 1900.
In 1926, she wrote what is considered the "undoubtedly most brilliant PhD thesis ever written in astronomy".
She continued in the same spirit - only to be denied a professorship (or even the a proper astronomer position). She finally became a professor at Harvard at 1956(!) & first woman to chair a department.
What's this boring looking thing? It's anything but boring, although its mission is like watching grass grow until it's hit by an ultrahigh energy cosmic ray! This is an element of the Telescope Array Cosmic Observatory west of Delta, Utah. It's one of 507 scintillator detectors that are spread across ~270^2 miles. Since 2008, 30 ultra-high-energy cosmic particles have been detected. Thus far, there's no explanation for their extreme energy or their origin.
Ein Interview mit mir in "Welt der Physik" - zu meinem Engagement gegen die #Klimakrise, zu meiner Wissenschaft und Vulkane werden auch kurz erwähnt :)
Tomorrow we get the first images from Euclid, a new space telescope located at the Earth's L2 Lagrange point.
Euclid, the explorer of dark matter, will make a 3D-map of the cosmos by observing billions of galaxies out to 10 billion light-years, across more than a third of the sky.
Euclid is a fabulous new space telescope currently out at the Sun-Earth L2 Lagrange point (see below) whose mission is to map the cosmos and search for dark matter. About two months ago a problem with Euclid's guidance system was discovered and today it has been fixed. Ho-ray! 👏