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#Astrodon

103 posts60 participants5 posts today
Public
Starry Time Podcast

Since I'm seeking #Pleiades content as I scroll today -- we did an #astronomy & #mythology #podcast episode on the Pleiades last season!

You can check it out here if you want to learn more about this star cluster / nymph sisters: starrytimepodcast.podbean.com/

starrytimepodcast.podbean.comAsterism: The Pleiades in Astronomy and Mythology | Starry TimeJoin Jordan and Kit as they explore the astronomy and mythology of the Pleiades!  Episode transcripts: https://www.starrytimepodcast.com/episode-transcripts.html Website: https://www.starrytimepodcast.com/ Social: https://universeodon.com/@starrytimepod Timestamps00:00 Intro00:43 Astronomy of the Pleiades05:00 Mythology of the Pleiades10:20 Retconstellations14:37 Oracle AI18:06 Outro Keywords/Topics Covered:  Pleiades, Seven Sisters, Messier 45, Asterism, Taurus Constellation, Open Star Cluster, Reflection Nebulae, Greek Mythology, Orion, Atlas, Oceanids, Folklore, Retconstellations, AI Oracle, Astronomy, Mythology.
#AstroDon#Space#Science
Public
MPI for Gravitational Physics

🚨 New header picture 🖼️

It shows the two supernova remnants Cassiopeia A (left, in X-rays) and Vela Jr. (right, at radio wavelengths). Both harbor a “central compact object”, a neutron star left behind together with the debris cloud after the supernova.

Researchers from the permanent independent @maxplanckgesellschaft research group “Continuous Gravitational Waves” at @mpi_grav in Hanover, Germany, have been searching for gravitational waves from these central compact objects using the volunteer distributed computing project @einsteinathome.

📄 arxiv.org/abs/2503.09731

The fact that they did not find any gravitational waves indicates that the neutron stars can only be minimally deformed.

ℹ️ aei.mpg.de/1188233/digging-dee

Images: snrcat.physics.umanitoba.ca/SN and snrcat.physics.umanitoba.ca/SN

Two images of supernova remnants, the left in blue false color, the right in red false color.
#HeaderPicture#supernova#CasA
Public
MPI for Gravitational Physics

🚨 Neues Header-Bild 🖼️

Es zeigt die beiden Supernova-Überreste Cassiopeia A (links, im Röntgenbereich) und Vela Jr. (recht, im Radiobereich). Beide beherbegen ein „zentrales kompaktes Objekt“, einen Neutronenstern, der mit der Explosionswolke nach der Supernova zurückblieb.

Forschende der dauerhaften unabhängigen @maxplanckgesellschaft Forschungsgruppe „Kontinuierliche Gravitationswellen“ am @mpi_grav in Hannover haben mit dem verteilten Rechenprojekt @einsteinathome nach Gravitationswellen von diesen zentralen kompakten Objekten gesucht.

📄 arxiv.org/abs/2503.09731

Dass sie keine Gravitationswellen gefunden haben, verrät, dass die Neutronensterne nur minimal verformt sein können.

ℹ️ aei.mpg.de/1188233/digging-dee

Bilder: snrcat.physics.umanitoba.ca/SN bzw. snrcat.physics.umanitoba.ca/SN

Zwei Bilder von Supernova-Überresten, das linke in blauer Falschfarbe, das rechte in roter Falschfarbe.
#HeaderBild#Supernova#CasA
Public
Richard

“We really shouldn’t have found a galaxy like this, given our current understanding of how the universe evolved. Imagine the early universe wrapped in a thick fog, making it extremely hard to detect strong beacons shining through it. Yet here we see this galaxy’s beam piercing through the veil.”

A New Cosmology Mystery: James-Webb Telescope Observes a Galaxy It Shouldn’t!
dailygalaxy.com/2025/03/a-new-

Jades Gs Z13 1 Galaxy
The Daily Galaxy - Great Discoveries Channel · A New Cosmology Mystery: James-Webb Telescope Observes a Galaxy It Shouldn’t!A distant galaxy has just turned up in James Webb's lens—far too bright and far too early. Its ultraviolet glow cuts through a universe that should have been dark and opaque.
#JWST#astronomy#cosmology
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Richard

Many Protoplanetary Disks Aren't Much Bigger Than Earth's Orbit
universetoday.com/articles/man

"'The observations also show that these compact discs could have optimal conditions for the formation of so-called super-Earths, as most of the dust is close to the star, where super-Earths are typically found', Sanchez said. Super-Earths are similar to Earth in many ways, but can be up to ten times more massive than our home world. This could explain why low-mass stars seem to have so many super-Earths and why they're the most common type of planet in the Universe.

In contrast, stars with larger disks seem to produce more Jupiter- and Saturn-sized worlds, but no super-Earths. So, what does that say about our Solar System? The team's survey seems to imply that our collection of planets was born in a large protoplanetary disk. That's because we have Jupiter and Saturn and we only have a 'regular-sized' Earth. 'This research provides a fascinating link between the sizes of observed planets and the sizes of observed protoplanetary disks,' said van der Marel, also of Leiden Observatory."

#astronomy#Astrodon
Public
Daniel Pomarède

ExoMars Rosalind Franklin rover will have a European landing platform

The European Space Agency (ESA) has selected Airbus to design and build the landing platform for the ExoMars Rosalind Franklin rover. In 2028, ESA will launch this ambitious exploration mission to search for past and present signs of life on Mars.

esa.int/Science_Exploration/Hu

www.esa.intExoMars Rosalind Franklin rover will have a European landing platformThe European Space Agency (ESA) has selected Airbus to design and build the landing platform for the ExoMars Rosalind Franklin rover. In 2028, ESA will launch this ambitious exploration mission to search for past and present signs of life on Mars.
#ExoMars#RosalindFranklin#ESA
Public
ESO

Supermassive black hole caught playing with its food!

The supermassive black hole at the centre of galaxy NGC 4945 is swallowing huge amounts of matter. Yet, contrary to a black hole’s all-consuming reputation, our Very Large Telescope (VLT) has caught it blowing out powerful winds of material.

This cone-shaped wind is shown in red in the inset image. In fact, the wind is moving so fast that it will end up escaping the galaxy altogether, lost to the void of intergalactic space.

Read more: eso.org/public/images/potw2513

📷 ESO/C. Marconcini et al.

A galaxy stretching across the dark, star-filled expanse of space. Beside it, an inset zooms in on the galaxy’s core, revealing clouds of gas and dust, from which a bright, red, cone-shaped structure emerges.
#astrodon#astronomy#astrophysics
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leece

Hello folks, it's been a little while so lets get some sky happening down here in #PerthWesternAustralia

I've been enjoying my Dwarf3 telescope, so let me share with you the unicorn's nostril (true, you look at Monoceras and that's where it is!), the Rosette Nebula, or Caldwell 49.

We also have IC 2944 another great Nebula, but one I'm in extreme doubt about its popular name to the extent that I'm going to use my own name for it, so let me introduce you to the Rising Phoenix Nebula. If you want to use the other name that's fine but lalalalala I can't hear you.

Both those images are straight out of camera. I think at least 400 frames but I'd have to check my records as it was a week or two ago.

The next subject is a bit small, I've cropped it a bit to make up for it somewhat. It's NGC 2997, a spiral galaxy in Antlia the Bellows. Why have I bothered given that I like an apparent size of 20 or so minutes, and this doesn't even get to 10? Well, it's one of these rare, to my view, straight on spiral galaxies, it's not edge on, so it gets a pass. And this got a good couple of hours last night, and turned out really well, I dickered a little with Snapseed. We had some rain, and wow, the sky was very clean and clear, and this object shows it. I really want to do a longer exposure, even if it's little.

And the last one is one that did get that longer treatment - it's the notorious Centaurus A, commonly known as the Hamburger Galaxy. I left this one on the roof overnight preprogrammed for a good few hours and this comes to you also from straight out of camera. It really is a peculiar galaxy, and sports a couple of supernovae and a dust cloud that gives it that split look.

There's a fair few stars in the view, some big blue white ones amongst them, but dominating the centre of the frame is a pinky red nebula that has a rather floral aspect. Light pink in the middle, but there's a dark patch there with big blue white stars there in the centre. Petal like pink and red gas plumes complet the flower like illusion.
A dense starfield with pink and red nebulae, mostly in the middle. There are a few distinctly larger, bluer stars, and the main nebula mass looks a bit like a rising phoenix.
A medium dense starfield, some larger stars blue and gold, and in the middle a classic spiral galaxy, pretty small though.
A starfield of mostly tiny stars, and also a couple of galaxies that can just be made out. The main subject is a strange galaxy, a golden radiating glow, but it is split in half by a dark dust field and does look a bit like a hamburger.
#astronomy#BackYardAstronomy#SouthernHemisphereAstronomy
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Enrique Boeneker

I found out from Wikipedia that this distant object is called Sarah's Galaxy. I find this name more appropriate than the ordinary and vulgar one that people call it. Sarah's Galaxy refers to Sarah Williams, who wrote this poem that is all me now:

"Though my soul may set in darkness, it will rise in perfect light;
I have loved the stars too truly to be fearful of the night."
The Old Astronomer

Seen edge-on, NGC 3628 is known to be a spiral galaxy. However, its profile is odd. Looks thick to me, and its extremes look thicker. I assume this oddness is due to its many interactions with its neighbors, which form the famous Leo's Triplet.
#astronomy#astrophotography#Astrodon
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