#JWST🧵
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drnereide.bsky.social
🧵1/9
Fascinating stuff— #JWST has spotted the oldest supernova ever confirmed.

It exploded when the #universe was just ~730 Myr old (~5% of its current age).

The whole thing began with a very bright gamma-ray burst, GRB 250314A.🔭 🧪

➡️ science.nasa.gov/missions/web...

#space #astronomy #science
James Webb Space Telescope NIRCam view of deep space showing hundreds of distant galaxies in different shapes and colors against black. A white zoom box in the center-right highlights a tiny faint red dot labeled GRB 250314A—the gamma-ray burst source and its very distant host galaxy.
February 10, 2026 at 7:09 PM
melina-iras07572.bsky.social
(1/5) 🧵
#JWST MIRI IFU 🔭 images of proplyd 551-51201 in NGC 1977. It is basically a protoplanetary disk around a young star that is being evaporated away by radiation coming from nearby massive stars (outside the frame, called 42 Orionis). #star-formation #proplyd
The proplyd showing an ionization front and a blueshifted tail. Left is Argon and right is Neon.
February 3, 2026 at 8:04 AM
jackiebranc.com
1/3🧵🔭🧪 The Origin of the Crab Nebula - Crab Pulsar PSR B0531+21 | #JWST

31-10-2022
Principal Investigator: Tea Temim
Program info: www.stsci.edu/jwst-program...
Source: MAST Archive

NIRCam: f480m,f150w2-f162m | green channel simulated
Credit: #NASA/ #ESA/ #CSA/ #STScI/ Jackie Branc

#CrabNebula
1/2🧵🔭🧪 The Origin of the Crab Nebula - Crab Pulsar PSR B0531+21 | #JWST 31-10-2022 Principal Investigator: Tea Temim Program info: https://www.stsci.edu/jwst-program-info/program/?program=01714 Source: MAST Archive NIRCam: f480m,f150w2-f162m | green channel simulated Credit: #NASA/ #ESA/ #CSA/ #STScI/ Jackie Branc ----- 1/2🧵I fell in love with a star. Butterflies in my stomach, the world seems so vividly coloured, I obsessively keep thinking about you. What are you doing right now, my Star? Neutrons are dripping away, my beloved degenerate fermion gas. A heart full of pions and kaons, you wink at me through 10¹² gauss… My beloved Neutron Star (PSR B0531+21).
February 2, 2026 at 7:21 AM
wendysun.bsky.social
Paper day!! Little Red Dots (LRDs) are seen everywhere by JWST, but even after 3 years of relentless effort we are still debating what these things actually are. We decompose LRDs to show LRD - Host Galaxy = Black Hole Star (BH*)! 🧵
arxiv.org/abs/2601.20929
🔭 🧪
February 1, 2026 at 1:04 AM
astrokatie.com
That shrouded black hole would create a glow that would look, to our telescopes, a little star-like and a little black-hole-like. Specifically, the authors say, this could explain the "Little Red Dots" (LRDs) seen in JWST images of extremely distant parts of the cosmos. 3/🧵
January 30, 2026 at 10:56 PM
astrokatie.com
There's an interesting new paper out today (not yet peer reviewed) suggesting an explanation for a weird phenomenon seen with JWST that might point to a "hitherto unobserved physical phenomenon," proposed in a couple of previous papers, called "black hole stars." arxiv.org/abs/2601.20929 1/🧵
Little Red Dot $-$ Host Galaxy $=$ Black Hole Star: A Gas-Enshrouded Heart at the Center of Every Little Red Dot
The central engines of Little Red Dots (LRDs) may be ``black hole stars" (BH*s), early stages of black hole growth characterized by dense gas envelopes. So far, the most direct evidence for BH*s comes...
arxiv.org
January 30, 2026 at 10:56 PM
mbkplus.bsky.social
This paper, out today, caught my eye. It's about the mass function of stars — how many stars of a given mass exist — in massive, early galaxies, and it runs counter to a lot of people's expectations. It's related to some of the excitement about JWST and the earliest epochs of galaxy formation. 🧪🧵
Bottom-heavy initial mass functions reveal hidden mass in early galaxies
JWST observations have revealed that massive galaxies formed and evolved far faster than predicted by galaxy formation models, with many having already assembled a large mass in stars $\sim12$ billion...
arxiv.org
January 29, 2026 at 7:47 PM
orifox.bsky.social
I'm excited to announce my newest paper out on arxiv: Expanding the High-z Supernova Frontier with JWST 🚀

We just used JWST to push transient astronomy to z ~ 5, discovering 68 supernovae...all without a dedicated time-domain survey.

Here’s what we found 👇🧵

1/n
January 15, 2026 at 3:04 PM
drnereide.bsky.social
🧵
Westerlund 2 looks just like a holiday scene in this new, magical image from the JWST.

Those red and orange gas clouds and thousands of bright stars recall the #Christmas vibe.

➡️ esawebb.org/images/potm2...

🔭 🧪 #Webb #Universe #galactic #JWST

1/6
Image Description (from the source linked in the thread): "A cluster of stars inside a large nebula. The clouds of gas and dust are predominantly bright red in colour and wispy, akin to flames. They are clumped in the bottom-left corner. Other clouds, deeper in the cluster behind many of the stars, appear pale pink. The stars are concentrated in the top half of the image and are mostly small, bright white and six-pointed. They cast blue light over the nebula. Other stars with very long spikes surrounding them lie in the foreground."
December 22, 2025 at 7:16 PM
drnereide.bsky.social
🧵
Ever wonder what the baby universe looked like—just 800 million years after the Big Bang?

JWST has given us an amazing glimpse via a galaxy called Virgil, hidden in the iconic Hubble eXtreme Deep Field.

➡️ news.arizona.edu/news/monster...

🔭 🧪 #extragalactic #science #cosmology #JWST

1/11
A deep-space image from the James Webb Space Telescope shows a small patch of sky filled with thousands of distant galaxies as faint, diffuse spots and streaks in shades of blue, white, and subtle reds against a black background. An inset box zooms in on the reddish, compact galaxy Virgil, seen as it existed 800 million years after the Big Bang, highlighting its hidden supermassive black hole shrouded in dust.
December 16, 2025 at 3:06 PM
drnereide.bsky.social
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Admire this fascinating JWST picture.

The cluster MACSJ0159.2-0849, here featured, is a monster made of hundreds of galaxies, ~4.5 billion light-years away.

But the real magic? This galaxy cluster works as a gigantic, natural magnifying glass.

🔭 🧪 #extragalactic #cosmology

1/7
landru79.bsky.social Landru79 @landru79.bsky.social · Dec 5
James #Webb Space Telescope #JWST

Vast Exploration for Nascent, Unexplored Sources
High-redshift Galaxies and the Distant Universe

TARG: #MACSJ0159-0849
2025-12-01
PI: Fujimoto, Seiji
NIRCAM 444 410 300 277 210 200 150 115 090

yuval-harpaz.github.io/astro/jwst_l...

NASA/ESA/CSA/STScI/j. Roger
December 8, 2025 at 5:01 PM
drnereide.bsky.social
🧵
The #JWST has recently given us one of the most beautiful images of late years: the stellar system Apep, a trio of massive stars surrounded by four perfect dust spirals that look almost drawn by hand.

➡️ science.nasa.gov/missions/web...

🔭 🧪 #science #stellarastro #astro

1/9
December 5, 2025 at 12:25 AM
andrealuck.bsky.social
2/2 🧵

The Outer Planets by JWST - My final version

Full size image & all info: flic.kr/p/2oUkYSY 🧪🔭
Credit: NASA/ESA/CSA/STScI/AndreaLuck
The image is divided into four sections, each showing one of the gas giants against a black background. Top left: Jupiter. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact. Top right: Saturn. It has a pale beige surface with soft horizontal shading. Surrounding it is a wide, bright ring system tilted diagonally. The rings look thin and sharply defined, with multiple subtle bands of light and dark. Bottom left: Uranus. It appears as a smooth blue-green sphere with some whitish circular clouds around the pole that is facing the observer. Surrounding it is a bright circular ring system made up of thin white lines. The rings form a bright, symmetrical halo around the planet. Bottom right: Neptune. It is a blue sphere with slightly brighter and darker circular features on its atmosphere. It also has a thin ring system, dimmer and less defined than Uranus’s in this image, appearing as a faint double oval around the planet. Each planet has its name printed below it in white capital letters.
December 4, 2025 at 2:34 PM
andrealuck.bsky.social
1/2 🧵

Reprocessed this JWST image of Jupiter and updated the Outer Planets composition in the thread. Rings everywhere!

Full size image: flic.kr/p/2rJRXeY 🔭🧪
Credit: NASA/ESA/CSA/STScI/AndreaLuck

JWST NIRCAM 2022-06-28
Filter: F212, F3322W2-F323N
PI: John A. Stansberry
Proposal ID 1022
In this image Jupiter, using colorised near infrared filters of JWST. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact.
December 4, 2025 at 2:32 PM
theacentauri.bsky.social
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Отримати час на спостереження за допомогою Телескопа Джеймса Вебба (JWST) — мрія багатьох астрономів. Найпотужніший космічний телескоп працює вже майже чотири роки.
November 18, 2025 at 10:20 AM
andrealuck.bsky.social
1/3 You might’ve seen last week’s newly released JWST data of Planetary Nebula NGC2440, here’s my take on it 😵

Full size 4K image and more info in this thread 🧵 🔭🧪

Credit: NASA/ESA/CSA/STScI/j. Roger/Andrea Luck CC BY
November 1, 2025 at 2:04 PM
theacentauri.bsky.social
🧵
Європейське космічне агентство (ESA) опублікувало колаж із восьми зображень гравітаційного лінзування, зроблених телескопом Джеймса Вебба (JWST). Ці знімки демонструють спотворені галактики, які були зафіксовані під час першого циклу спостережень.
October 9, 2025 at 4:07 PM
drnereide.bsky.social
🧵
The JWST, using its NIRCam instrument, captured an immense stellar jet, 8 light-years long, that is almost twice the distance to Alpha Centauri.

It lies at the heart of the galactic frontier, 15,000 light-years from the Sun, and originates from...

➡️ science.nasa.gov/missions/web...

🔭 🧪 #science
The image depicts a stellar jet in a dark nebula. At center, yellow-orange gas filaments form a side-view rose, tilted from upper left to lower right like a flattened bloom. Extending from it are two symmetric red lobes: tall, narrow triangles with rounded tips, made of wavy, irregular lines like pulsing veins. Dozens of stars dot the scene: a bright white one crowns the rose; a vivid blue star sits lower left. Both have diffraction spikes The background is deep black space, evoking a mysterious, symmetric eruption. A cosmic masterpiece of gas and light.
September 22, 2025 at 4:31 PM
melina-iras07572.bsky.social
IC 348 with #JWST NIRCam. It belongs to the Perseus molecular cloud. It is a young star-forming regon, which is slightly closer than the Orion Nebula. #astronomy

Additional images in the thread 🧵

My image processing from today. Full resolution image: commons.wikimedia.org/wiki/File:IC...
A blue-brown nebula, with fine filaments and outflows on the lower right.
September 21, 2025 at 9:11 AM
melina-iras07572.bsky.social
#Galaxy cluster Abell 402 (MACS J0257-2209) has quite a few interesting objects. 🧵

First an image with #JWST NIRCam filters F277W, F356W and F444W, showing the cluster in an overview.
A cluster of galaxies with blue galaxies and several brown lensed galaxies.
September 15, 2025 at 10:40 PM
drnereide.bsky.social
🧵
This JWST image was released in 2024, but let's not just exclaim "oh, my God" or "breathtaking".

Let's consider the science and technology behind it.

Image Credit: NASA, ESA, CSA, STScI, M. Ressler (NASA-JPL)

➡️ webbtelescope.org/contents/news-releases/2024/news-2024-131

🔭🧪 #science
"At centre is a compact star cluster composed of luminous red, blue, and white points of light. Faint jets with clumpy, diffuse material extend in various directions from the bright cluster. Above and to the right is a smaller cluster of stars. Translucent red wisps of material stretch across the scene, though there are patches and a noticeable gap in the top left corner that reveal the black background of space. Background galaxies are scattered across this swath of space, appearing as small blue-white and orange-white dots or fuzzy, thin discs. There is one noticeably larger blue-white point with diffraction spikes, a foreground star in the upper right." Description from: https://www.esa.int/ESA_Multimedia/Images/2024/09/Webb_peers_into_the_Extreme_Outer_Galaxy
September 13, 2025 at 5:39 PM
melina-iras07572.bsky.social
Large image 🧵 about #nebulae observed by #JWST 🔭 observation id 4567 (Lindberg et al.). All objects are located in the Small Magellanic Cloud (a nearby galaxy). #SmallMagellanicCloud

First is NGC 456, containing the regions LHA 115-N 83A (lower right) and LHA 115-N 83B (upper left)
Blue and red nebulae. One bright blue star on the lower left.
September 10, 2025 at 10:27 AM
drnereide.bsky.social
🧵
An interesting study shares JWST breathtaking images of a protoplanetary disk seen edge-on around the protostar IRAS04302+2247, still nestled in its birth cloud.

The young star is located 525 ly away in the Taurus star-forming region.

Image Credit: ESA/Webb, NASA & CSA, M. Villenave et al

🔭 🧪
"A wide-field image of IRAS 16594-4656 taken by the James Webb Space Telescope. The nebula’s bright core is split by a narrow dark band, with expansive rainbow lobes of light and colour radiating outward. Numerous background galaxies and stars are visible across the field." From the press release.
September 3, 2025 at 11:09 PM