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Reposted by Melina Thévenot🏳️‍⚧️

Thomas Carpentier @thocarp.bsky.social · 8h

Last night, the JWST observed Uranus for calibration. Even like that the result is awesome, so here you go with my processed image of that observation! 🔭

HD: flic.kr/p/2ry78y3

Observation of Uranus by the JWST. The planet itself appears mostly blue, but the pole, a big patch, is white. Some storms can also be spotted near the pole. The rings of the planet can be spotted in infrared light, so they appear in that image (in orange color).

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Reposted by Melina Thévenot🏳️‍⚧️

ESA Space Science @science.esa.int · 5h

🆕Researchers combed through images from ESA's #MarsExpress & #ExoMars spacecraft to find 1039 swirling dust devils 🌪️

Using these dust devils to track raging winds on Mars, their findings include that the strongest winds blow much faster than we thought!

Read more 👉 www.esa.int/Science_Expl... 🧪 ☄️

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 9h

Discovery paper: ui.adsabs.harvard.edu/abs/2007ApJ....

A Very Bright, Highly Magnified Lyman Break Galaxy at z = 3.07

Using Hubble Space Telescope imaging and Keck spectroscopy, we report the discovery of a very bright, highly magnified (~30 times) Lyman break galaxy (LBG) at z=3.07 in the field of the massive z=0.33...

ui.adsabs.harvard.edu

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 9h

The Cosmic Eye is a gravitational lens discovered in 2007. 🔭

My #JWST NIRCam image processing (filters F115W, F150W, F182M)

program: www.stsci.edu/jwst-program...

A lens with two arcs and a lens shaped galaxy in the middle.

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Reposted by Melina Thévenot🏳️‍⚧️

ESA Space Science @science.esa.int · 1d

Scientists are still analysing the data from both ExoMars and Mars Express, including combining short-exposure shots to see if they can spot the faint comet in Mars Express data.

Their work may help us understand what 3I/ATLAS is made of and how it behaves as it approaches the Sun.

Stay tuned.

ExoMars Trace Gas Orbiter image of comet 3I/ATLAS

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Reposted by Melina Thévenot🏳️‍⚧️

Emily Hunt @emily.space · 1d

Oooh the Nobel Prize is out today, so it's time for my yearly round of ignoring that news and reading about many of the women who were snubbed of the prize in the past and who the Nobel Prize committee refuses to apologise for. 🧪🔭

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 1d

#galaxy cluster MJ0417.5-1154 (aka ACT-CL J0417.5-1154) with #JWST NIRCam (F300M, F444W)

program: VENUS www.stsci.edu/jwst-program...

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 2d

(3/3)
The F560W image is from here, just zoomed in.

Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · Aug 20

Even level 1 products looked saturated. The least saturated was the F560W image.

Gray scale image of the same view. A few bright stars and a bright but smaller nebula is seen in the center.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 2d

(2/3)
I made a detailed description how I made the images here: commons.wikimedia.org/wiki/File:Ga...

For context here is the F560W image (gray) as a comparison, with a second MIRI/IFU field on the upper right.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 2d

(1/3)
Trying something new: #JWST MIRI IFU (spectroscopy and image in one) of the galactic center. On the right are three emission lines of various elements.

The red circle indicates the position of the supermassive black hole (Sgr A*, position from SIMBAD) #SgrA

Left image shows brown clouds and stars with wide artificial filters. The right image shows artificial narrow filters with a colorful image of blue, yellow, green and red.

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Reposted by Melina Thévenot🏳️‍⚧️

p.s @p-s-v.bsky.social · 6d

Visualization of magnetic fields inside a brown dwarf
© Adnan-Ali AHMAD & Alex ANDRIX - CRAL
vimeo.com/1122901309?f...

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 2d

The artifact only appears in the short wavelength channel, so I assume it is an artifact called "Dragon's breath type II" jwst-docs.stsci.edu/known-issues...

Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 2d

Here the entire cluster with redder infrared filters (filters F277W, F356W, F444W).

The large lens at the upper right and closest to the center was discovered with Gemini @usngo.bsky.social in this paper: ui.adsabs.harvard.edu/abs/2014A%26...

Blue galaxies in the galaxy cluster, lensing brown background galaxies into arcs.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 2d

Some detail of the lenses in the #galaxy cluster PLCKESZ G004.5-19.5 (discovered by @esa.int PLANCK mission).

#JWST NIRCam image (filters F115W, F150W, F200W) Large image at the top has a large reflected light artifact (rainbow pattern). #gravitationallensing

program: www.stsci.edu/jwst-program...

Details of some of the lenses. Top shows two large lenses and bottom shows two individual images with one lens each.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 3d

Some follow-up with IRTF can be seen on IRSA, saying it is a suspected luminous red nova (LRN). This happens when two stars merge.

But no paper was published for now, so we will see what the researchers think about it after careful examination of their observations.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 3d

Explain your username:

IRAS 07572-3100 is a star that had a huge infrared brightening beginning in 2015 and created a new nebula. I discovered that brightening and the nebula. (see also www.astronomerstelegram.org?read=14416)

Animation: images of 2012 and 2017 with the same filters (g, r, i).

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 3d

Yes and yes to both questions.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 3d

New image from this proposal: Star Cluster VVV CL160. Very difficult to see in this sea of stars (should be at the center of the image). Filters the same as the other images.

A lot of blue and orange stars. Maybe an overdensity in the center.

Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 3d

This image made it to 900+ ⬆️ upvotes on reddit (www.reddit.com/r/spaceporn/...) and the top post on that subreddit for the day.

Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 4d

This background galaxy is being lensed by the #galaxy cluster MACS J2129.4-0741 and shows 6 copies.

#JWST NIRCam image (filters: F115W, F200W, F444W)

program: www.stsci.edu/jwst-program... with target MRGM2129

Labels of the galaxy with Hubble by Monna+2017 (ui.adsabs.harvard.edu/abs/2017MNRA...)

A red galaxy shows 6 copies of itself. Four of the copies are in the middle, forming a line. Two copies are at the top and bottom. Lots of other galaxies form lens arcs or are part of the cluster.

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Reposted by Melina Thévenot🏳️‍⚧️

Michael Plummer @magmaskies.bsky.social · 5d

I’m thrilled to announce a new paper that went up on the arXiv last night: arxiv.org/abs/2510.02260! The paper finds and maps the connections between clouds, temperature structure, and chemistry in the isolate exoplanet analog SIMP 0136. Very grateful to all my collaborators and co-authors!

Mapping the Cloud-Driven Atmospheric Dynamics & Chemistry of an Isolated Exoplanet Analog with Harmonic Signatures

Young planetary-mass objects and brown dwarfs near the L/T spectral transition exhibit enhanced spectrophotometric variability over field brown dwarfs. Patchy clouds, auroral processes, stratospheric ...

arxiv.org

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 4d

For two copies that is a yes, for the other copies I don't know. I would need to read the paper more carefully and I am not an expert in lensing. Maybe someone else can give you a better answer.

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Reposted by Melina Thévenot🏳️‍⚧️

Simeon Schmauß @stim3on.bsky.social · 5d

I think Perseverance may have spotted interstellar comet 3I/Atlas last night from Mars!

After stacking 20 images from Mastcam-Z, I found a faint smudge of light in the constellation Corona Borealis close to the location where the comet was expected. 🔭

Credit: NASA/JPL-Caltech/ASU/Simeon Schmauß

image of the night sky showing a starfield with several dark and bright stars that are quite elongated due to the long exposure time.

the stars of the constellation corona borealis are annotated in green. a faint smudge, perhaps comet 3I/Atlas is marked with a red circle.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 4d

Update for JWST cal level 3 release dates for October. Mosty topics related to galaxies and star forming regions. Some additional light echo images and comet 133P. I don't list some programs (e.g. distant galaxies).

Also: Likely official image of the Helix Nebula (PN) will be published.

List of programs, mostly for us nerds that create images out of the calibrated files released online.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 4d

Because the researchers in Monna et al. says so. (see the paper I linked above, look at figure 1).

They also took two spectra (below from figure A.1, they have a typo 1.6 should be 1.4). They find very similar redshifts.

Two copies of the same galaxy with images on the right and spectra on the left.

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Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 4d

No. I made a cutout to better show the 6 copies. A full image can be seen here. It is not centered on the cluster (maybe to avoid less sensitive regions in the middle).

Astrobot JWST @astrobotjwst.bsky.social · 4d

🤖 image processing for #JWST 🔭 data (MRGM2129). RGB Filters: 444, 277, 115
PI: Newman, Andrew B., program 04903. CRVAL: 322.345963, -7.687036
Credits: NASA, ESA, CSA, STScI.

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