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Reposted by Daniel Machacek

kosmi.bsky.social @kosmi.bsky.social · 5h

Small part of Antarctica.

Image taken by Sentinel-2 on Oct. 7, 2025.

-76.38, -151.14

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Reposted by Daniel Machacek

ESA Space Science @science.esa.int · 7h

🆕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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Reposted by Daniel Machacek

Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 11h

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 Daniel Machacek

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

First images of comet #3I/ATLAS from Europe's Mars orbiters 😍

Observing the comet from 30 million km away, #ExoMars reveals the halo of gas and dust surrounding the comet's nucleus.

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

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Reposted by Daniel Machacek

Riding With Robots @ridingrobots.bsky.social · 2d

The world is full of fear. It also has this. I hope you can find a little where you are, in one way or another.

Big Cottonwood Canyon, Utah this evening

Colorful autumn aspens and green pines in late afternoon light on a mountainside in Utah. I hope you have new, better dreams. Photo: Bill Dunford

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Reposted by Daniel Machacek

kosmi.bsky.social @kosmi.bsky.social · 2d

Small part of Antarctica.

Image taken by Sentinel-2 on Oct 1, 2025.

-69.84, 75.56

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Reposted by Daniel Machacek

Daniel Pomarède @pomarede.bsky.social · 2d

#APOD Astronomy Picture of the Day

The Changing Ion Tail of Comet Lemmon

Credit: Victor Sabet & Julien De Winter
www.star.ucl.ac.uk/~apod/apod/a... 🧪🔭

Five shots side-by-side capturing Comet Lemmon at different times, illustrating how a comet tail might change. The ion tail of Comet C/2025 A6 (Lemmon) has been changing markedly, as detailed in the featured image sequenced over five days between September 25 and October 3 (left to right) from Texas, USA. On some days, the comet's ion tail was relatively more complex than other days. Reasons for tail changes include the rate of ejection of material from the comet's nucleus, the strength and complexity of the passing solar wind, and the rotation rate of the comet. Sometimes, over the course of a week, apparent differences even result from a change of perspective from the Earth. In general, a comet's ion tail will point away from the Sun, as gas expelled is pushed out by the Sun's wind. Comet Lemmon is still inbound and brightening, passing nearest the Earth on October 21 and nearest the Sun on November 8.

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Reposted by Daniel Machacek

kosmi.bsky.social @kosmi.bsky.social · 3d

Shiveluch volcano in Kamchatka.

Image taken today by Sentinel-2.

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Reposted by Daniel Machacek

Daniel Pomarède @pomarede.bsky.social · 3d

Notwithstanding the shutdown, some extraordinary images captured by Percy are still being delivered!

zoomhub.net/985ZZ

#Mars Oct. 4, 2025 - Sol 1644 🧪🔭
Credits images: NASA/JPL-Caltech/ASU

An ochre toned mosaic capturing rocks and sands on Mars.

An ochre toned image capturing a Martian rock

An ochre toned image zooming on a Martian rock

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Reposted by Daniel Machacek

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 Daniel Machacek

Erika @explorecosmos.bsky.social · 4d

Meteor shower captured during the Perseids peak over Polonony Dark Sky Park, Slovakia.

#Astronomy #Science #Cosmos #Physics #News

👉 petrhoralek.com

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Reposted by Daniel Machacek

Simeon Schmauß @stim3on.bsky.social · 4d

Last night, NASA's Perseverance rover looked up at the night sky once more, to capture interstellar #comet 3I/Atlas flying by the red planet.

The distance was "only" 0.2 AU or 30 Mio km, far closer than the comet ever got to Earth. 🔭 #3IAtlas

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

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Reposted by Daniel Machacek

Melina Thévenot🏳️‍⚧️ @melina-iras07572.bsky.social · 7d

Edge-on protoplanetary disk called Gomez's Hamburger. I re-processed this image only using the higher-resolution short wavelength images, using calibration level 2 data. #ProtoplanetaryDisk #GomezsHamburger

#JWST NIRCam image on wikimedia: commons.wikimedia.org/wiki/File:Go...

An edge-on disk, showing a dar mid-plane and bright nebulae at the top and bottom.

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Reposted by Daniel Machacek

Kevin Olsen @drksolsen.bsky.social · 4d

Years in the making, a new paper details organic molecules in Enceladus' plumes that were collected by Cassini when it flew through them!
This keeps the icy moons at the forefront of interest and high priority targets!! Can't wait for Juice!
🔭🧪 #planetsci
doi.org/10.1038/s415...

Detection of organic compounds in freshly ejected ice grains from Enceladus’s ocean - Nature Astronomy

Fresh ice grains from Enceladus’s plume were analysed during the highest-speed fly-by of the Cassini spacecraft. Organic compounds with a range of chemical structures were discovered, suggesting comprehensive subsurface chemistry on Enceladus.

doi.org

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Reposted by Daniel Machacek

Seán Doran @theseaning.bsky.social · 4d

'Squid Game'

A star trail image made with a time-lapse image sequence photographed by Kimiya Yui from ISS. Each image was restored, remastered then retimed using frame interpolation for a short film. These new frames allowed for a simulated long exposure photograph.

Stars glowing in long exposure streaks of light as ISS orbits Earth. The Dextre robotic arm on ISS in the foreground. Long streaks of red and yellow light against the black sea are evidence of fishing fleets.

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Reposted by Daniel Machacek

RedSPMN @redspmn.bsky.social · 4d

MOSAICO DE IMÁGENES mostrando la evolución del cometa #Lemmon durante los últimos meses. Indica la distancia al Sol (R) y a la Tierra (D) en Unidades Astronómicas (u.a.). Lo tenemos ahora en el amanecer en el límite a simple vista 🤩
📷 Dídac Mesa Romeu desde #Castelló/#Castellón

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Reposted by Daniel Machacek

Simeon Schmauß @stim3on.bsky.social · 6d

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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Reposted by Daniel Machacek

kosmi.bsky.social @kosmi.bsky.social · 6d

2015-2024

😊📹

bsky.app/profile/kosm...

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Reposted by Daniel Machacek

Simeon Schmauß @stim3on.bsky.social · 6d

This photo from the Perseverance rover captured in early March, may be my favorite Mars image from this year.

It shows Mars' smaller moon Deimos over the hills of the Nili Planum region in the dark skies before dawn. 🔭

Full res: flic.kr/p/2rwUwV7

Credit: NASA/JPL-Caltech/Simeon Schmauß

A picture of Mars taken during astronomical twilight (the sun was 13° below the horizon). It shows a dimly lit reddish landscape with some hills at the horizon. Deimos, Mars' smaller moon shines with a small halo in the pale sky above.

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Reposted by Daniel Machacek

Prof. Josep M. Trigo-Rodríguez @joseptrigo.bsky.social · 6d

#Comet 𝟮𝟬𝟮𝟱 𝗔𝟲 (𝗟𝗲𝗺𝗺𝗼𝗻) is getting bright. It will be

Beautiful image by
📷 Aleix Roig @astrocatinfo.bsky.social on Oct.2 ☄️

I wrote this article in @es.theconversation.com to find it:
theconversation.com/dos-nuevos-c...

Just prepare your telescopes and cameras, be ready for this beauty!

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Reposted by Daniel Machacek

NeV-T @nev-t.bsky.social · 6d

MSL 4554-4649 CC BABATI MONS © NASA/JPL-Caltech/MSSS/NeV-T

Gigapan - retry.gigapan.com/gigapans/238...
GIGAmacro - viewer.gigamacro.com/view/bhz58L1...
Gigapan Website - www.nev-t-gigamacros.com
#Mars #science #NASA

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Reposted by Daniel Machacek

Del - Martian Observer @martian-observer.art · 6d

'Umbra radar satellite of the world's largest maze in the heart of a cornfield at Richardson Adventure Farm in Illinois'

Rêves d'espace @revesdespace.bsky.social · 6d

😲 Image prise par un satellite radar d'Umbra du plus grand labyrinthe au monde au coeur d'un champ de maïs à Richardson Adventure Farm dans l'Illinois (Résolution : 50 cm).
Avez vous reconnu ce que représente le dessin ?

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Reposted by Daniel Machacek

Scott Kardel aka Palomar Skies @palomarskies.bsky.social · 7d

The view is even better on camera 3. www.youtube.com/live/BqmpkUd...

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Reposted by Daniel Machacek

Thomas Appéré @thomasappere.bsky.social · 7d

Vous cherchez un spot pour faire de l'escalade 🧗‍♂️?
J'ai ce qu'il vous faut : admirez ces superbes falaises sur Mars photographiées par le rover Curiosity. Celle au centre fait ~39m de haut et avec la faible gravité martienne (1/3 de la pesanteur terrestre), il sera plus facile de grimper !
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Des falaises escarpées de couleur ocre, striées en couches successives. Au premier plan, on voit des reliefs recouverts de sable marron sombre. Le ciel est de couleur marron clair.
© NASA/JPL-Caltech/MSSS/LANL/CNES/IRAP/Thomas Appéré

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Daniel Machacek @danielmachacek.bsky.social · 7d

Thank you Thomas!

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