Jupiter Hansen (Cheng)
@jupforjupiter.bsky.social
Structural Planetary Geologist | From Mercury to Pluto 🪐 | Asteroid 32027 | Playing too much video 🎮 | She/her/Dr. | 🇭🇰 | 🐈⬛🐈
jupiterhansen.com
jupiterhansen.com
Pinned
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
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/...
🧪🔭🪐
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/...
Reposted by Jupiter Hansen (Cheng)
Welcome back to #TrilobiteTuesday
Here is Asaphus lepidurus from the Middle Ordovician rocks of St. Petersburg, Russia. Trilobites from these limestones have a beautiful caramel colored shell and are preserved three-dimensionally!
Here is Asaphus lepidurus from the Middle Ordovician rocks of St. Petersburg, Russia. Trilobites from these limestones have a beautiful caramel colored shell and are preserved three-dimensionally!
February 10, 2026 at 10:13 PM
Welcome back to #TrilobiteTuesday
Here is Asaphus lepidurus from the Middle Ordovician rocks of St. Petersburg, Russia. Trilobites from these limestones have a beautiful caramel colored shell and are preserved three-dimensionally!
Here is Asaphus lepidurus from the Middle Ordovician rocks of St. Petersburg, Russia. Trilobites from these limestones have a beautiful caramel colored shell and are preserved three-dimensionally!
Reposted by Jupiter Hansen (Cheng)
Oddly, I had a hard time thinking of Venus as a sedimentary active place. But there is an atmosphere with wind, there is physical and (strong) chemical erosion, there is tectonic to form gradients... so, yes, of course it's sedimentary active. 🧪
Link: link.springer.com/article/10.1...
Link: link.springer.com/article/10.1...
February 9, 2026 at 3:26 PM
Oddly, I had a hard time thinking of Venus as a sedimentary active place. But there is an atmosphere with wind, there is physical and (strong) chemical erosion, there is tectonic to form gradients... so, yes, of course it's sedimentary active. 🧪
Link: link.springer.com/article/10.1...
Link: link.springer.com/article/10.1...
Reposted by Jupiter Hansen (Cheng)
HiPOD: Troughs and Ridges in Chryse Planitia
This image presents us with wide troughs with a narrow ridge running down the middle. How did these form? Chryse Planitia is flat lowland region in the Northern Hemisphere of Mars.
https://uahirise.org/hipod/ESP_076659_2105
#Mars #science #NASA
This image presents us with wide troughs with a narrow ridge running down the middle. How did these form? Chryse Planitia is flat lowland region in the Northern Hemisphere of Mars.
https://uahirise.org/hipod/ESP_076659_2105
#Mars #science #NASA
February 6, 2026 at 3:01 PM
HiPOD: Troughs and Ridges in Chryse Planitia
This image presents us with wide troughs with a narrow ridge running down the middle. How did these form? Chryse Planitia is flat lowland region in the Northern Hemisphere of Mars.
https://uahirise.org/hipod/ESP_076659_2105
#Mars #science #NASA
This image presents us with wide troughs with a narrow ridge running down the middle. How did these form? Chryse Planitia is flat lowland region in the Northern Hemisphere of Mars.
https://uahirise.org/hipod/ESP_076659_2105
#Mars #science #NASA
No new pictures. Where you at mentally?
February 6, 2026 at 5:31 AM
No new pictures. Where you at mentally?
That happens to me a few times as well. It is even worse when your field or topic is very niche...
After four months, the journal has not found a single reviewer for my PhD student's manuscript. The academic peer review system is broken.
I think we all should:
1. Review three papers for every one that we submit.
2. Promptly declined to review a paper when the request arrives.
#AcademicChatter
I think we all should:
1. Review three papers for every one that we submit.
2. Promptly declined to review a paper when the request arrives.
#AcademicChatter
February 5, 2026 at 6:57 PM
That happens to me a few times as well. It is even worse when your field or topic is very niche...
Reposted by Jupiter Hansen (Cheng)
HiPOD: About a Pedestal Crater
The objective of this observation is to examine a pedestal crater here in Deuteronilus Mensae. A pedestal crater is when the ejecta from an impact settles and is more erosion-resistant than the surrounding terrain.
https://uahirise.org/hipod/ESP_076643_2260
#Mars
The objective of this observation is to examine a pedestal crater here in Deuteronilus Mensae. A pedestal crater is when the ejecta from an impact settles and is more erosion-resistant than the surrounding terrain.
https://uahirise.org/hipod/ESP_076643_2260
#Mars
February 4, 2026 at 3:01 PM
HiPOD: About a Pedestal Crater
The objective of this observation is to examine a pedestal crater here in Deuteronilus Mensae. A pedestal crater is when the ejecta from an impact settles and is more erosion-resistant than the surrounding terrain.
https://uahirise.org/hipod/ESP_076643_2260
#Mars
The objective of this observation is to examine a pedestal crater here in Deuteronilus Mensae. A pedestal crater is when the ejecta from an impact settles and is more erosion-resistant than the surrounding terrain.
https://uahirise.org/hipod/ESP_076643_2260
#Mars
Meet our new cat OREO!
He is a 2yo from the shelter. He immediately came out yesterday, wanted to be pet, and purrs. He is happy to be picked up as well!
#cats #tuxedocat #cowcat #caturday but not saturday 🫠
He is a 2yo from the shelter. He immediately came out yesterday, wanted to be pet, and purrs. He is happy to be picked up as well!
#cats #tuxedocat #cowcat #caturday but not saturday 🫠
February 4, 2026 at 6:43 PM
Meet our new cat OREO!
He is a 2yo from the shelter. He immediately came out yesterday, wanted to be pet, and purrs. He is happy to be picked up as well!
#cats #tuxedocat #cowcat #caturday but not saturday 🫠
He is a 2yo from the shelter. He immediately came out yesterday, wanted to be pet, and purrs. He is happy to be picked up as well!
#cats #tuxedocat #cowcat #caturday but not saturday 🫠
We built Winogradsky columns in class using mud and water collected from a campus lake.
Students added potato chips, cornmeal, and paper towels to compare differences in geomicrobiological processes after six weeks. ⚒️
Students added potato chips, cornmeal, and paper towels to compare differences in geomicrobiological processes after six weeks. ⚒️
February 3, 2026 at 11:11 PM
We built Winogradsky columns in class using mud and water collected from a campus lake.
Students added potato chips, cornmeal, and paper towels to compare differences in geomicrobiological processes after six weeks. ⚒️
Students added potato chips, cornmeal, and paper towels to compare differences in geomicrobiological processes after six weeks. ⚒️
Reposted by Jupiter Hansen (Cheng)
He also works on valid dwarf planets with @jupforjupiter.bsky.social, e.g., this paper by Cheng, Klimczak, and Matsuyama (open access).
www.science.org/doi/full/10....
www.science.org/doi/full/10....
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
February 3, 2026 at 9:02 PM
He also works on valid dwarf planets with @jupforjupiter.bsky.social, e.g., this paper by Cheng, Klimczak, and Matsuyama (open access).
www.science.org/doi/full/10....
www.science.org/doi/full/10....
Young scientist 🙋🏻♀️
#academicbsky Senior scientist response to invitation to review:
I am now xx years old and I feel that it is important that younger scientists have the chance to review manuscripts. I have done 60 years of reviewing - enough is enough. Sorry
Me: the names of those younger scientists please! 😅
I am now xx years old and I feel that it is important that younger scientists have the chance to review manuscripts. I have done 60 years of reviewing - enough is enough. Sorry
Me: the names of those younger scientists please! 😅
February 3, 2026 at 6:19 PM
Young scientist 🙋🏻♀️
Reposted by Jupiter Hansen (Cheng)
Ok, positive scientific thing (for a change):
We're going to talk about the work of Yale seismologist Maureen Long, because her work is focused on the most direct evidence of mantle flow and convection we can get.
Her career essentially defines our direct knowledge of mantle flow.
We're going to talk about the work of Yale seismologist Maureen Long, because her work is focused on the most direct evidence of mantle flow and convection we can get.
Her career essentially defines our direct knowledge of mantle flow.
February 2, 2026 at 11:32 PM
Ok, positive scientific thing (for a change):
We're going to talk about the work of Yale seismologist Maureen Long, because her work is focused on the most direct evidence of mantle flow and convection we can get.
Her career essentially defines our direct knowledge of mantle flow.
We're going to talk about the work of Yale seismologist Maureen Long, because her work is focused on the most direct evidence of mantle flow and convection we can get.
Her career essentially defines our direct knowledge of mantle flow.
Reposted by Jupiter Hansen (Cheng)
Fieldwork isn't always 100% successful. This is a great story from @zhonggg.bsky.social. 🎁🔗
Deep Inside an Antarctic Glacier, a Mission Collapses at Its Final Step
www.nytimes.com
February 2, 2026 at 11:19 PM
Fieldwork isn't always 100% successful. This is a great story from @zhonggg.bsky.social. 🎁🔗
Reposted by Jupiter Hansen (Cheng)
Cracked open a pegmatite I found, really cool geological stuff going on in here, any rockhounds wanna take a look?
#rockhound #geology
#rockhound #geology
January 28, 2026 at 10:13 PM
Cracked open a pegmatite I found, really cool geological stuff going on in here, any rockhounds wanna take a look?
#rockhound #geology
#rockhound #geology
Reposted by Jupiter Hansen (Cheng)
Cool fact, sand can be made up entirely of biogenic material (shell pieces, spines, exoskeletons). Just hard bits of tiny animals (sometimes fossilised!). It's just body parts of dead animals.
January 29, 2026 at 4:22 AM
Cool fact, sand can be made up entirely of biogenic material (shell pieces, spines, exoskeletons). Just hard bits of tiny animals (sometimes fossilised!). It's just body parts of dead animals.
January 28, 2026 at 7:37 PM
Took students out for outcrops visit today to look at some AL sedimentary rocks. A little chilly, but a great chance to see real geology and learn to take field notes and sketches just on campus. ⚒️⛏️
January 28, 2026 at 12:05 AM
Took students out for outcrops visit today to look at some AL sedimentary rocks. A little chilly, but a great chance to see real geology and learn to take field notes and sketches just on campus. ⚒️⛏️
Reposted by Jupiter Hansen (Cheng)
I want to say clearly:
LPI staff and scientists are NOT the problem. Let's not attack them. The problem is failure of leadership at USRA, and the decision of LPI leadership to delete abstracts without having a conversation with the community.
LPI staff and scientists did not make the decision.
LPI staff and scientists are NOT the problem. Let's not attack them. The problem is failure of leadership at USRA, and the decision of LPI leadership to delete abstracts without having a conversation with the community.
LPI staff and scientists did not make the decision.
January 27, 2026 at 2:18 AM
I want to say clearly:
LPI staff and scientists are NOT the problem. Let's not attack them. The problem is failure of leadership at USRA, and the decision of LPI leadership to delete abstracts without having a conversation with the community.
LPI staff and scientists did not make the decision.
LPI staff and scientists are NOT the problem. Let's not attack them. The problem is failure of leadership at USRA, and the decision of LPI leadership to delete abstracts without having a conversation with the community.
LPI staff and scientists did not make the decision.
Reposted by Jupiter Hansen (Cheng)
This country has a serious fascism problem, but cats exist, so that’s nice.
📷 Pentax 17
🎞️ Portra 400
#believeinfilm #catsonfilm
📷 Pentax 17
🎞️ Portra 400
#believeinfilm #catsonfilm
January 26, 2026 at 5:16 PM
This country has a serious fascism problem, but cats exist, so that’s nice.
📷 Pentax 17
🎞️ Portra 400
#believeinfilm #catsonfilm
📷 Pentax 17
🎞️ Portra 400
#believeinfilm #catsonfilm
Reposted by Jupiter Hansen (Cheng)
A nurse. A researcher. A helper.
January 24, 2026 at 9:01 PM
A nurse. A researcher. A helper.
January 26, 2026 at 1:23 AM
Reposted by Jupiter Hansen (Cheng)
So close, NYT! Just take out the "Appear to" and you're doing real journalism! (And even this is better than usual.)
January 24, 2026 at 10:47 PM
So close, NYT! Just take out the "Appear to" and you're doing real journalism! (And even this is better than usual.)
Reposted by Jupiter Hansen (Cheng)
A video of Alex Pretti reading out the final salute of an unnamed veteran he cared for until the end of his life in the ICU, posted to Facebook by his son.
January 25, 2026 at 1:18 AM
A video of Alex Pretti reading out the final salute of an unnamed veteran he cared for until the end of his life in the ICU, posted to Facebook by his son.
Reposted by Jupiter Hansen (Cheng)
Alex from our time working together, while he was in nursing school. Later, he moved to ICU, working as a nurse to support critically ill Veterans. He had such a great attitude. We’d chat between patients about trying to get in a mountain bike ride together. Will never happen now
January 24, 2026 at 7:39 PM
Alex from our time working together, while he was in nursing school. Later, he moved to ICU, working as a nurse to support critically ill Veterans. He had such a great attitude. We’d chat between patients about trying to get in a mountain bike ride together. Will never happen now