#Supernovae
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usngo.bsky.social
US National Gemini Office
@usngo.bsky.social
This week’s image is of the supernova SN2011fe (the bright blue object in the upper right of the image)! This star’s explosive death was observed in the galaxy M101, about 20 million light-years away from us. Check out the 🧵 for more papers involving supernovae!

#Astronomy

📸 credit in thread
October 31, 2025 at 7:00 PM Everybody can reply
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nuclearanthro.bsky.social
🇵🇸Martin “Doomsday” Pfeiffer🖖🏳️‍🌈
@nuclearanthro.bsky.social
This is amazing y’all.

White dwarf pulls He from neighbor star causing dwarf-surrounding explosion…

…causing inward traveling shockwave that compresses dwarf star’s core & results in supernova.

Many a nuclear weapons designer was an astrophysicist b/c that’s a closest analogue to a NUDET.
Seeing of double trouble •17183 The supernova in this new study-SNR 0509-67.5-is roughly 160,000 light-years away from Earth in the constellation Dorado. The astronomers describe a new image they took with data from the ESO's VLT that proves this hunch about double explosions was correct. Some Type la supernovae explode through a "double-detonation" mechanism rather than just one. In this new model, the white dwarf forms a blanket of stolen helium around itself. Helium is a chemical element that can become unstable and ignite. If that happens, the initial explosion generates a shockwave that travels around the white dwarf and inwards. This triggers a second detonation in the core of the star, which ultimately forms the supernova. Previously, there has been no clear, visual evidence of a white dwarf undergoing a double detonation. Astronomers have predicted that this process would create a distinct pattern or fingerprint seen in the supernova's still-glowing remains. They theorized that this clue would be visible long after the initial explosion, partially because the remnants of such a
November 1, 2025 at 3:33 PM Everybody can reply
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astronomy.bsky.social
Astronomy 🔭
@astronomy.bsky.social
A galactic duet in Cepheus
The Fireworks Galaxy (NGC 6946) dazzles with 10 supernovae in just a century, while nearby open cluster NGC 6939 shines only 5,600 light-years away. A cosmic blend of beauty and distance.

Image Credit & Copyright: Alberto Pisabarro
A galactic duet in Cepheus The Fireworks Galaxy (NGC 6946) dazzles with 10 supernovae in just a century, while nearby open cluster NGC 6939 shines only 5,600 light-years away. A cosmic blend of beauty and distance. Image Credit & Copyright: Alberto Pisabarro
October 26, 2025 at 5:15 PM Everybody can reply
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nuclearanthro.bsky.social
🇵🇸Martin “Doomsday” Pfeiffer🖖🏳️‍🌈
@nuclearanthro.bsky.social
Given that my research interests are in part nuclear weapons focused, and that many a nuclear weapons designer was an astrophysicist, this is a particularly amazing description to me!

An external detonation causes star compression that leads to kaboom!
Seeing of double trouble •17183 The supernova in this new study-SNR 0509-67.5-is roughly 160,000 light-years away from Earth in the constellation Dorado. The astronomers describe a new image they took with data from the ESO's VLT that proves this hunch about double explosions was correct. Some Type la supernovae explode through a "double-detonation" mechanism rather than just one. In this new model, the white dwarf forms a blanket of stolen helium around itself. Helium is a chemical element that can become unstable and ignite. If that happens, the initial explosion generates a shockwave that travels around the white dwarf and inwards. This triggers a second detonation in the core of the star, which ultimately forms the supernova. Previously, there has been no clear, visual evidence of a white dwarf undergoing a double detonation. Astronomers have predicted that this process would create a distinct pattern or fingerprint seen in the supernova's still-glowing remains. They theorized that this clue would be visible long after the initial explosion, partially
November 1, 2025 at 3:25 PM Everybody can reply
1 reposts 5 likes
1 1 5
hourlycosmos.bsky.social
Hourly Cosmos
@hourlycosmos.bsky.social
Deep View of the Tarantula Region in LMC - Narrowband Bicolour - From Rolf Wahl Olsen - https://flic.kr/p/2mkXRi3
This image is a mosaic of two deep fields centered near the bright Tarantula Nebula (NGC 2070) in the Large Magellanic Cloud (LMC). The field is filled with numerous bright colourful nebulae and star clusters (an annotated version is available here). At the LMCs distance of approximately 160,000 light years, the field of view seen here spans a massive 2850 x 1950 light years! At this large scale the nebulosity seem to feature many bubble shaped voids of different sizes. These are formed by the radiation pressure from young star forming regions and shockwaves from ancient supernovae. The small but comparatively recent supernova remnant of SN1987a is also visible here, as a tiny pink dot in the upper part of the image - if you know where to look. Image Acquisition details: Date: Jan-Feb 2021 Exposure: Ha OIII: 335:335 mins, total 14 hours 30 mins @ -25C Telescope: Homebuilt 12.5" f/4 Serrurier Truss Newtonian Camera: QSI 683wsg with Lodestar guider Filters: Astrodon 3nm Ha/OIII and LRGB E-Series Gen 2 Taken from my observatory in Auckland, New Zealand
October 27, 2025 at 8:00 PM Everybody can reply
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yaxara.bsky.social
Yaxara/Koris
@yaxara.bsky.social
Fra i fenomeni più energetici dell'universo si annoverano i buchi neri supermassicci, alcune supernovæ extragalattiche, la collisione fra stelle di neutroni e Aliena dopo aver dormito quasi dodici ore.
October 25, 2025 at 8:35 AM Everybody can reply
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joquarky.bsky.social
kex
@joquarky.bsky.social
If I did the estimate correctly, it would be the energy equivalent of a million simultaneous supernovae all occurring at the same time and place.
October 25, 2025 at 12:57 AM Everybody can reply
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webb-telescope.bsky.social
James Webb 🔴 Gallery
@webb-telescope.bsky.social
ESA/Webb (@esa.int) images (Nov 9, 2023)

MACS0416, a galaxy cluster 4.3 billion light-years away, features a stunning array of galaxies, with gravitational lensing magnifying distant stars and supernovae.

esawebb.org/images/weic2327c/
A composite image of galaxy cluster MACS0416, featuring a dense field of galaxies with distorted linear features due to gravitational lensing. Credit: NASA, ESA, CSA, STScI, J. Diego (Instituto de Física de Cantabria, Spain), J. D’Silva (U. Western Australia), A. Koekemoer (STScI), J. Summers & R. Windhorst (ASU), and H. Yan (U. Missouri)
October 25, 2025 at 3:01 PM Everybody can reply
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lsstuk.bsky.social
Rubin LSST:UK
@lsstuk.bsky.social
Our own @cfrohmaier.bsky.social has written the algorithms to enable 4MOST to observe the largest ever spectroscopic sample of supernovae; Chris coordinates the spectroscopic follow-up of LSST-discovered supernovae with the partner survey 4MOST-TiDES 🔭
October 23, 2025 at 1:13 PM Everybody can reply
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lsstuk.bsky.social
Rubin LSST:UK
@lsstuk.bsky.social
Congratulations to @4most-eu.bsky.social
which has achieved First Light, splitting the light into 18,000 spellbinding colour components. 🎉 Read more about this multi-tasking telescope, which will collect the largest ever spectroscopic sample of supernovae. 🔭
tinyurl.com/2wnw86zd
Portsmouth and Southampton scientists help secure the first capture of light in all its colours from cosmic objects
tinyurl.com
October 23, 2025 at 1:13 PM Everybody can reply
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blazing7799.bsky.social
Blazing fire 🔥
@blazing7799.bsky.social
I LOVE gold, and I always think about one of my favorite facts about gold.

the fact that the gold we have on earth came from the death of a star! Supernovae, or the collision of 2 neutron stars!
Motherfucking NEUTRON STARS!! Same for other heavy elements!
October 21, 2025 at 12:39 AM Everybody can reply
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esa.int
European Space Agency
@esa.int
📷 This NASA/ESA #Hubble Space Telescope image features spiral galaxy NGC 3370, home to two kinds of objects prized by astronomers for their usefulness in determining distances to faraway galaxies: Cepheid variable stars and Type Ia supernovae 🧪🔭
esahubble.org/images/potw2... @stsci.edu
A spiral galaxy occupies most of the image. It is a slightly tilted disc of stars, yellow-white in the centre and blue in the outskirts, showing light from different stars in the galaxy. Its spiral arms curl outwards from the centre, speckled with blue star clusters. Dark reddish threads of dust swirl around the galaxy’s centre. The backdrop is four medium-sized and many small, distant galaxies on a black background.
October 20, 2025 at 10:03 AM Everybody can reply
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hourlycosmos.bsky.social
Hourly Cosmos
@hourlycosmos.bsky.social
Celestial Fireworks: First Amateur Detection of Light Echoes from 19th-Century Great Eruption of Eta Carinae - From Rolf Wahl Olsen - https://flic.kr/p/2pqiiku
The images in this gallery are the first amateur images of light echoes from the 19th-century Great Eruption of Eta Carinae. These light echoes have been detected by the Hubble Space Telescope and from large observatories such as the CTIO 4m telescope, but this is the first time that amateur images reveal these transient features. My other first amateur detection of light echoes from supernova SN1987a inspired me to try looking for the fainter echoes near Eta Carinae. What are Light Echoes? Light echoes occur when the initial flash from a bright source, like a supernova, is reflected back to us from a slightly different direction. Dust clouds in interstellar space reflect a portion of the outward-traveling light from the supernova, redirecting it towards Earth. These faint light echoes can be observed decades or centuries after the original flash. Swiss astronomer Fritz Zwicky, known for his contributions to supernovae, neutron stars, dark matter, and gravitational lenses, predicted the existence of light echoes as early as 1940. Together with Walter Baade, he coined the term 'supernova' in 1934 and proposed that faint echoes of historical supernovae could be visible long after the initial explosion. The Great Eruption was a significant brightening of the star Eta Carinae that occurred in phases during the mid-19th century. The light echoes are produced when the initial flash from the eruption is subsequently reflected off interstellar dust as light travels outward from ...
October 21, 2025 at 1:00 AM Everybody can reply
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hubble-telescope.bsky.social
Hubble 🔴 Gallery
@hubble-telescope.bsky.social
ESA/Hubble (@esa.int) images (Oct 20, 2025)

NGC 3370, located 90 million light-years away in the constellation Leo, is vital for distance measurements using Cepheid variable stars and Type Ia supernovae.

esahubble.org/images/potw2542a/
A spiral galaxy, NGC 3370, with yellow-white center and blue outskirts, surrounded by dust and distant galaxies. Credit: ESA/Hubble & NASA, A. Riess, K. Noll
October 20, 2025 at 4:30 AM Everybody can reply
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vrubinobs.bsky.social
NSF–DOE Rubin Observatory
@vrubinobs.bsky.social
Eye on the southern sky 🌌

NSF–DOE Rubin Observatory is like a cosmic watchtower, capturing the entire visible sky every few nights.

Before, scientists would spend their careers looking for supernovae. But Rubin will accomplish in minutes or hours what used to take a lifetime! 🔭🧪
A boot-shaped observatory perched on its rocky mountain summit site under a star-filled sky with the Milky Way galaxy arching overhead.
October 17, 2025 at 7:45 PM Everybody can reply
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hourlycosmos.bsky.social
Hourly Cosmos
@hourlycosmos.bsky.social
Celestial Fireworks (widefield, annotated): First Amateur Detection of Light Echoes from 19th-Century Great Eruption of Eta Carinae - From Rolf Wahl Olsen - https://flic.kr/p/2pqiQri
The images in this gallery are the first amateur images of light echoes from the 19th-century Great Eruption of Eta Carinae. These light echoes have been detected by the Hubble Space Telescope and from large observatories such as the CTIO 4m telescope, but this is the first time that amateur images reveal these transient features. My other first amateur detection of light echoes from supernova SN1987a inspired me to try looking for the fainter echoes near Eta Carinae. What are Light Echoes? Light echoes occur when the initial flash from a bright source, like a supernova, is reflected back to us from a slightly different direction. Dust clouds in interstellar space reflect a portion of the outward-traveling light from the supernova, redirecting it towards Earth. These faint light echoes can be observed decades or centuries after the original flash. Swiss astronomer Fritz Zwicky, known for his contributions to supernovae, neutron stars, dark matter, and gravitational lenses, predicted the existence of light echoes as early as 1940. Together with Walter Baade, he coined the term 'supernova' in 1934 and proposed that faint echoes of historical supernovae could be visible long after the initial explosion. The Great Eruption was a significant brightening of the star Eta Carinae that occurred in phases during the mid-19th century. The light echoes are produced when the initial flash from the eruption is subsequently reflected off interstellar dust as light travels outward from ...
October 14, 2025 at 2:00 PM Everybody can reply
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hourlycosmos.bsky.social
Hourly Cosmos
@hourlycosmos.bsky.social
SNR J0505.7-6752 - From Judy Schmidt (geckzilla.bsky.social) - https://flic.kr/p/2ha6pjL
Another supernova remnant from the Large Magellanic Cloud, seen by Hubble and Chandra in visible, near-infrared, and x-ray light. This time I've overlapped two color images together, because I heard you like color so I put color in your color so you can look at color while you look at color. Hubble data from the following proposal was used to create the image: A Search for Surviving Companions of Type Ia Supernovae in the Large Magellanic Cloud Chandra data: Red: .30-.70 keV Green: .70-.80 keV Blue: .80-4.20 keV (Obs IDs 3876 & 4440) Hubble data: Red Screen & 30% Luminosity: WFC3/UVIS F656N Red: WFC3/UVIS F814W Green: WFC3/UVIS F555W Blue: WFC3/UVIS F475W North is 48.38° clockwise from up.
October 12, 2025 at 2:00 AM Everybody can reply
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cosmiconeness.bsky.social
The Church of Cosmic Oneness
@cosmiconeness.bsky.social
A beautiful image of the Cat's Eye Nebula by the Hubble Telescope.

Viewing this image, you're looking at yourself.

It may not feel like it, but you are stardust. You are that base-essence of everything.

You contain minerals that were once blasted across the cosmos from supernovae. 💥🌟🌀
#Hubble
A beautiful image of the Cat's Eye Nebula, taken by the Hubble Space Telescope. Clouds of colored, swirling gas rippling outwards and forming rings around a small pinpoint of light in the very center, which is the star's remaining nucleus.
October 10, 2025 at 7:50 PM Everybody can reply
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hourlycosmos.bsky.social
Hourly Cosmos
@hourlycosmos.bsky.social
Animation (Luminance+HaOIII): First Amateur Detection of Light Echoes from 19th-Century Great Eruption of Eta Carinae - From Rolf Wahl Olsen - https://flic.kr/p/2pqiQxA
The images in this gallery are the first amateur images of light echoes from the 19th-century Great Eruption of Eta Carinae. These light echoes have been detected by the Hubble Space Telescope and from large observatories such as the CTIO 4m telescope, but this is the first time that amateur images reveal these transient features. My other first amateur detection of light echoes from supernova SN1987a inspired me to try looking for the fainter echoes near Eta Carinae. What are Light Echoes? Light echoes occur when the initial flash from a bright source, like a supernova, is reflected back to us from a slightly different direction. Dust clouds in interstellar space reflect a portion of the outward-traveling light from the supernova, redirecting it towards Earth. These faint light echoes can be observed decades or centuries after the original flash. Swiss astronomer Fritz Zwicky, known for his contributions to supernovae, neutron stars, dark matter, and gravitational lenses, predicted the existence of light echoes as early as 1940. Together with Walter Baade, he coined the term 'supernova' in 1934 and proposed that faint echoes of historical supernovae could be visible long after the initial explosion. The Great Eruption was a significant brightening of the star Eta Carinae that occurred in phases during the mid-19th century. The light echoes are produced when the initial flash from the eruption is subsequently reflected off interstellar dust as light travels outward from ...
October 10, 2025 at 5:00 AM Everybody can reply
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7 72
usngo.bsky.social
US National Gemini Office
@usngo.bsky.social
Throwback post: This week’s image is of Supernova 2020fqv! Gemini’s GMOS-N captured this supernova peaking out of the dramatic merger between two spiral galaxies. Check out the 🧵 for more supernovae paper highlights!

#Astronomy
October 8, 2025 at 9:00 PM Everybody can reply
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pauleric70.bsky.social
Paul Eric Scannell
@pauleric70.bsky.social
and spreads via supernovae, implying rapid star generations in mere cosmic moments. Galaxy is 10x richer in heavy elements, larger, and brighter than models foresaw. Early universe was fast, fiery, and complex—not slow.Key questions: How did oxygen form so quickly? More such galaxies?
October 4, 2025 at 1:05 AM Everybody can reply
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brisbaneastro.bsky.social
Chris Jensen
@brisbaneastro.bsky.social
This image shows NGC 6979, Pickering's Triangle, a part of the larger Veil Nebula complex in Cygnus. It is the remnant of a massive star that exploded as a supernova between 10,000 and 20,000 years ago. #astrophotography @kat-astro-bot.bsky.social
This image features NGC 6979 (Pickering’s Triangle), a striking filamentary section of the Veil Nebula in the constellation Cygnus. The Veil is the remnant of a massive star that went supernova between 10,000 and 20,000 years ago, an event that would have blazed as brightly as the full Moon in Earth’s sky. What we see today are the shock fronts and ionised gas clouds left behind as the stellar explosion continues to expand into the interstellar medium. NGC 6979 is one of the most intricate regions, its lace-like filaments shaped by turbulent interactions between the shock wave and varying densities of surrounding gas. The glowing colours correspond to different elements excited by the blast: Hydrogen (Hα) produces red emission, Doubly ionised oxygen (O III) glows blue-green, Sulfur (S II) contributes deeper red tones. Together, they reveal the composition of the progenitor star and its environment, and provide insight into how supernovae enrich the galaxy with heavy elements — the building blocks of new stars, planets, and even life. The entire Veil Nebula complex spans nearly 110 light-years across and lies at a distance of about 2,400 light-years from Earth. Imaging details Telescope: William Optics ZenithStar 61II Camera: ZWO ASI533MC Pro Filter: Antlia Quad Band Light Pollution filter Integration: 103 × 360s exposures, total 10.5 hours
October 2, 2025 at 2:43 PM Everybody can reply
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cosmicrami.com
CosmicRami 🏳️‍🌈🏳️‍⚧️
@cosmicrami.com
We use millisecond pulsars because they are much more stable than the younger, canonical pulsars (freshly born from supernovae).

In particular, we use their stable profiles to measure each observation against, with reference to our timing model.

This allows us to calculate 'timing residuals'

2/n
September 30, 2025 at 11:05 PM Everybody can reply
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zooniverse.bsky.social
Zooniverse
@zooniverse.bsky.social
Are you interested in galaxies? Supernovae? Want to help us learn more about how the environment of a galaxy may influence the types of supernovae we see? We welcome you to dive into our Zooniverse project: Supernova Host Herding! www.zooniverse.org/projects/boo...
Simple (exaggerated) rendition of a supernova occurring in a galaxy. Text: Zooniverse project. Supernova Host Herding
September 30, 2025 at 9:07 AM Everybody can reply
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fabianschussler.bsky.social
Fabian Schussler
@fabianschussler.bsky.social
🚀💥 Astro-COLIBRI v2.24.0 is now live!

This release is all about supernovae! We've added new filters, new notification streams, and a new figure. Plus, API enhancements, updated catalogs, an improved search for events, and many more. 🔭☄️🧪⚛️
Details in our forum post: tinyurl.com/2p2mncdu
🚀 Astro-COLIBRI v2.24.0 is Here! New Supernova Features & More!
Hello everyone, We’re excited to announce the release of Astro-COLIBRI version 2.24.0! This update brings a host of powerful new features, with a major focus on improving how you discover, filter, an...
forum.astro-colibri.science
September 30, 2025 at 7:39 AM Everybody can reply
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