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Jupiter Hansen (Cheng)

@jupforjupiter.bsky.social

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Jupiter Hansen (Cheng) @jupforjupiter.bsky.social · Jun 26

Check out our new paper in Science Advances!
🧪🔭🪐
We show that Vesta’s giant equatorial troughs—Divalia Fossae—likely formed from spin axis reorientation and despinning as a long-term consequence of the two massive impacts near the south poles. 🪨⚒️

www.science.org/doi/10.1126/...

Reorientation and despinning of 4 Vesta formed the Divalia Fossae

The Divalia Fossae are formed by tectonic stresses from reorientation and despinning of Vesta caused by large impacts.

www.science.org

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Reposted by Jupiter Hansen (Cheng)

HiRISE Beautiful Mars (NASA) @uahirise.bsky.social · 7h

HiPOD: Small Channels and a Rocky Patch in the Cydonia Region

This section of our observation is dominated by both a series of craters and the remnants of channels that may be from a past fluvial system.

More: uahirise.org/hipod/ESP_03...
NASA/JPL-Caltech/University of Arizona
#Mars #NASA

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Reposted by Jupiter Hansen (Cheng)

Hourly Cosmos @hourlycosmos.bsky.social · 20h

Mighty Odysseus - From NASA Marshall Space Flight Center - https://flic.kr/p/287mecr

The most visually striking feature on Saturn’s icy moon Tethys is Odysseus crater. An enormous impact created the crater, which is about 280 miles (450 kilometers) across, with its ring of steep cliffs and the mountains that rise at its center. Odysseus is on the leading hemisphere of Tethys (1,071 kilometers, or 665 miles across). In this image, north on Tethys is up.

This view is a composite of several images taken in visible light with the Cassini spacecraft narrow-angle camera on Aug. 17, 2015, at a distance of about 28,000 miles (44,500 kilometers) from Tethys.

The Cassini spacecraft ended its mission on Sept. 15, 2017.

Image credit: NASA/JPL-Caltech/Space Science Institute

Read More

Read more about Cassini

NASA Media Usage Guidelines

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Jupiter Hansen (Cheng) @jupforjupiter.bsky.social · 5h

It is #caturday 🐈‍⬛🐈

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Hourly Cosmos @hourlycosmos.bsky.social · 17h

Phobos - MSL Sol 3728 - MastCam - From Simeon Schmauß (stim3on.bsky.social) - https://flic.kr/p/2ofg7rk

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Hourly Cosmos @hourlycosmos.bsky.social · 16h

Jupiter in 1973 and 2000 - From Ian Regan - https://flic.kr/p/8whcy3

Comparison of two views of Jupiter taken in 1973 by Pioneer 10, and in 2000 by Cassini.

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Jupiter Hansen (Cheng) @jupforjupiter.bsky.social · 21h

jupiterhansen.com/prospective-...

Reposted by Jupiter Hansen (Cheng)

Carlos Moffat @carlosmoffat.com · Aug 29

🌊With the Fall semester upon us, it's time to start thinking about recruiting/applying to grad school for 2026.

If you are a marine scientist looking for a graduate student, I've created a form where you can add your name and other info:

docs.google.com/forms/d/e/1F...

Please share widely! (1/2)

Oceanography MS/PhD Positions for Fall 2026

This is an effort to collect the **contact information of potential advisors** for MS/PhD students in Oceanography. Please note that if you answer **you are agreeing to have your contact information...

docs.google.com

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Reposted by Jupiter Hansen (Cheng)

Sarah Tuttle @niais.bsky.social · 1d

Are you someone who is interested in astronomy graduate school? This is a list of many/most departments and their expectations for admissions this year. Please feel free to spread it far and wide. If you are doing admissions and you'd like to update your entry, reach out as per the form!

US Astronomy Graduate Admissions, AY 2025-2026

docs.google.com

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Reposted by Jupiter Hansen (Cheng)

Kevin M. Gill @kevinmgill.bsky.social · 2d

Sol 4683 MAHLI image of a rock that’s been cleared of dust by the DRT brush. Taken by the Mars Curiosity Rover. White balanced color.

flic.kr/p/2rydD5Z

A rock.

NASA/JPL-Caltech/MSSS/Kevin M. Gill

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ClimateFran @climatefran.bsky.social · 4d

All the life goals, right here

www.theguardian.com/science/2025...

Nobel committee unable to reach prize winner who is ‘living his best life’ hiking off grid

Fred Ramsdell was among those honoured with a 2025 Nobel Prize in Medicine but might not know because he is somewhere in Idaho and uncontactable

www.theguardian.com

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Reposted by Jupiter Hansen (Cheng)

Paul Byrne @theplanetaryguy.bsky.social · 7d

A few hours ago, Comet 3I/ATLAS passed about 28 million km from Mars.

This was the best opportunity we'll have to image the interstellar visitor from spacecraft.

When those data are available, I'll share them!

A screenshot from NASA's Eyes on the Solar System, showing the relative positions of 3I/ATLAS and Mars as of about 1700 Central time today.

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Reposted by Jupiter Hansen (Cheng)

Alex Spahn 🌋🌪️☄️ @spahn711.bsky.social · 8d

Approaching Shiprock. #photography

A black and white photograph of the iconic Shiprock taken from the center of a narrow dirt road pointing straight toward the geologic wonder. The sky is filled with numerous horizontal streaks of clouds.

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Reposted by Jupiter Hansen (Cheng)

RappCatsAdopt @rappcats.bsky.social · 8d

New arrival Penny is 7 yrs old and the sweetest thing. She didn't stay shy long - she's going to do great! Stay tuned, we'll soon see if Penny likes laps. ❤️
#cats #cat #pets #va #nova #virginia

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Reposted by Jupiter Hansen (Cheng)

Corey S. Powell @coreyspowell.bsky.social · 9d

Our galaxy is full of rogue planets, worlds that live in darkness without a parent star. And now we've caught one as it forms, scooping up gas at a rate of 6 billion tons a second. 🧪🔭

www.eso.org/public/news/...

Nebula where new stars are forming. Marked is Cha 1107−7626, a planetary-mass object with a disk.

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Reposted by Jupiter Hansen (Cheng)

Paul Byrne @theplanetaryguy.bsky.social · 8d

Almost exactly 30 years ago, the first extrasolar planet was identified orbiting a main-sequence star.

Now, not only can we directly image planets orbiting other stars, but we can see planets *being born*

Imagine what the next 30 years will bring.

A bright ring surrounds a star, with three smaller, dimmer blobs inboard of the outer ring. At least two of those dimmer blobs are exoplanets.

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Reposted by Jupiter Hansen (Cheng)

Prof Col Macpherson @colinmacpherson.bsky.social · 9d

Spectacular concentric zoning and twinning of large titanaugite in essexite (nepheline monzogabbro) from Lennoxtown, Scotland. Plagioclase inclusions within the phenocryst align with zoning just as proximal groundmass plagioclase align with its edge. #ThinSectionThursday 🧪⚒️

Large clinopyroxene (titanaugite) crystal takes up much of field of view. Tin plane cuts from top left to bottom right separating twins showing different interference colours. Multiple concentric zones apparent in finer oscillation of interference colours. Plagioclase and olivine groundmass surrounds the phenocryst.

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Reposted by Jupiter Hansen (Cheng)

Andrew Jones @andrewjonesspace.bsky.social · 10d

CNSA has released an image of Tianwen-2 in deep space using a robotic arm, giving us a proper look at the spacecraft and return capsule for delivering samples from near Earth asteroid 469219 Kamoʻoalewa. Tianwen-2 has been in space for 125 days, is 45 million km from Kamoʻoalewa.

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Reposted by Jupiter Hansen (Cheng)

Hourly Cosmos @hourlycosmos.bsky.social · 11d

NGC 7635 "Bubble Nebula" in SHO - From Ryan Kinnett (rkinnett.bsky.social) - https://flic.kr/p/2m8E3Qv

Imaged with GSO 10" f/4 Newtonian and asi1600mm at Mt Pinos, CA. Approx 3 hr integration.

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Reposted by Jupiter Hansen (Cheng)

tthomopoulos @tthomopoulos.bsky.social · 14d

Mars - Emirates Mars Mission - orbite 645

Enhanced RGB with F635, F546 and F437 filters / crop

Image credit : Emirates Mars mission/MBRSC/EXI/Thomas Thomopoulos

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Reposted by Jupiter Hansen (Cheng)

HiRISE Beautiful Mars (NASA) @uahirise.bsky.social · 14d

HiPOD: Informative Layers

This image shows layering near the base of the South Polar layered deposits (SPLD). Radar observations of these deposits and their northern counterparts show that they are rich in water ice.

uahirise.org/hipod/ESP_06...
NASA/JPL-Caltech/University of Arizona
#Mars

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Reposted by Jupiter Hansen (Cheng)

Paul Byrne @theplanetaryguy.bsky.social · 14d

Saturn, rising behind its largest moon Titan.

This scene is a composite of images taken by the Cassini spacecraft on 31 March 2005. At the time, Cassini was 7,000 km from Titan and 1.2 million km from Saturn.

Credit: NASA/JPL/SSI/Ian Regan/Val Klavans

In the foreground is Saturn's giant moon Titan, its hazy, peach-coloured atmosphere extending into space. Behind is Saturn itself, its upper hemisphere crossed by the shadows of its vast ring system.

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Reposted by Jupiter Hansen (Cheng)

Cam Muskelly (Explorer of Deep Time ⏰ ⚒️) @cambriancam.bsky.social · 16d

Here is the trilobite Angelina sedgwickii from the Lower Ordovician (Tremadocian) Dol-cyn-afon Formation from Wales, U.K. This trilobite is slightly distorted due to tectonic forces. It is a great teaching piece to discuss structural geology.

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Reposted by Jupiter Hansen (Cheng)

Nina Willburger @drnwillburger.bsky.social · 20d

The 3,000-year-old gold Shropshire sun pendant was dicovered in 2018.
Crafted with incredible skill and decorated with intricate geometric patterns, it symbolizes the importance of the sun in Bronze Age society.
As scientific analysis has indicated, the pendant...🧵1/2

📷 me

#archaeology 🏺

A gold half-disc pendant decorated with intricate geometric patterns of triangles and lines, displayed upright against a dark background with a soft circular light in the distance.

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Reposted by Jupiter Hansen (Cheng)

Hourly Cosmos @hourlycosmos.bsky.social · 20d

Io Revisited, a Glow in the Dark - From Gordan Ugarković (ugordan.bsky.social) - https://flic.kr/p/7epZCx

Several processed views of Io taken by Cassini on January 2nd, 2001 from a distance of 10.29 million km and at a phase angle of 73 degrees.

The bottom left image row shows two distinct plumes visible in the ultraviolet - the Tvashtar plume near north pole and the Pele plume near the equator and on the nightside.

The base of Pele's plume also prominently shows its thermal glow in the deep infrared filter, similar to views recently obtained by the New Horizons spacecraft.

The bottom right image clearly demonstrates this is not an imaging artifact as the eruption glow is visible in all infrared filters, dimming in intensity toward shorter wavelengths.

Cassini narrow-angle filtered composites, magnified 3 times.

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Reposted by Jupiter Hansen (Cheng)

David Ho @davidho.bsky.social · 21d

Having AI crammed down our throats is bullshit, but machine learning has some real uses in science. This awesome page shows experimental cyclone track forecasts from Google DeepMind and Google Research's AI weather models, along with forecasts from ECMWF. 😍

deepmind.google.com/science/weat...

A dark-themed weather tracking map from Google Weather Lab: Cyclones (Preview) showing hurricane/cyclone models in the Atlantic Ocean as of Friday, September 19, 2025, at 08:00. The map includes ensemble forecast tracks and storm markers extending from the mid-Atlantic toward Western Europe. Multiple colorful lines (green, orange, blue, purple, yellow) represent different storm model ensembles and possible tracks, with clusters of paths pointing toward Ireland, the United Kingdom, France, Spain, and Portugal. The cyclone originated east of the Caribbean, with its projected paths fanning northeastward across the Atlantic. Colored circles mark storm intensity along the tracks, numbered (e.g., 1, 2, 6) corresponding to categories. A second storm is visible off the Pacific coast of Mexico with clustered ensemble markers. The left panel lists model options (Observed, Our experimental model, WeatherNext Gen, WeatherNext Graph, ECMWF ENS, ECMWF HRES), a legend for storm markers, tracks, ensemble tracks, cones, and wind speed colors. At the bottom, sliders indicate initialization time (Fri, Sep 19, 2025, 08:00) and lead time (+6 days, Fri, Sep 26, 2025, 02:00). The background map highlights North America, the Atlantic Ocean, Western Europe, and parts of Africa.

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