Remembering the American astronomer, planetary scientist and science communicator — CARL SAGAN — born 92yrs ago today.
November 9, 2026 at 10:14 AM
Remembering the American astronomer, planetary scientist and science communicator — CARL SAGAN — born 92yrs ago today.
planetary boobies
November 10, 2026 at 6:04 AM
planetary boobies
Planetary breasts.
November 8, 2026 at 11:35 PM
Planetary breasts.
my most popular post on anything ever now is a planetary ratio on a racist
November 10, 2026 at 2:02 AM
my most popular post on anything ever now is a planetary ratio on a racist
Yes, ish. Impacts are, at best, an ad hoc explanation for planetary mysteries, the last resort of the damned.
November 9, 2026 at 7:18 AM
Yes, ish. Impacts are, at best, an ad hoc explanation for planetary mysteries, the last resort of the damned.
Vynn got the whole world for himself... it's a bit smaller than he thought, though!
Birthday art for @singlelatency.bsky.social!
#MacroFurry
Birthday art for @singlelatency.bsky.social!
#MacroFurry
November 10, 2026 at 3:00 AM
Vynn got the whole world for himself... it's a bit smaller than he thought, though!
Birthday art for @singlelatency.bsky.social!
#MacroFurry
Birthday art for @singlelatency.bsky.social!
#MacroFurry
From Phil Neel's excellent (and horrifying!) "Hellworld"
November 9, 2026 at 9:21 PM
From Phil Neel's excellent (and horrifying!) "Hellworld"
If you wanted to accelerate climate change, you’d do everything Trump does.
Define ‘planetary enemy’.
Define ‘planetary enemy’.
November 8, 2026 at 2:49 AM
If you wanted to accelerate climate change, you’d do everything Trump does.
Define ‘planetary enemy’.
Define ‘planetary enemy’.
We have entered the Anthropocene — an era where human activity dominates the earth system. #ResistanceEarth www.planetaryhealthcheck.org
This short video (3:19) explains why we have breached 7 out of 9 planetary boundaries. youtu.be/LnpEiDq4HBE?...
We have planetary crisis on our watch‼️ #ActNow
This short video (3:19) explains why we have breached 7 out of 9 planetary boundaries. youtu.be/LnpEiDq4HBE?...
We have planetary crisis on our watch‼️ #ActNow
Official Planetary Health Check 2026 with Johan Rockström
YouTube video by Planetary Boundaries Science
youtu.be
November 9, 2026 at 9:36 PM
We have entered the Anthropocene — an era where human activity dominates the earth system. #ResistanceEarth www.planetaryhealthcheck.org
This short video (3:19) explains why we have breached 7 out of 9 planetary boundaries. youtu.be/LnpEiDq4HBE?...
We have planetary crisis on our watch‼️ #ActNow
This short video (3:19) explains why we have breached 7 out of 9 planetary boundaries. youtu.be/LnpEiDq4HBE?...
We have planetary crisis on our watch‼️ #ActNow
We would expect the 2026 record to exceed the 2023 record by about 0.1C given the current planetary warming rate of ~0.3C/decade. We will see if that happens.
The global surface temperature anomaly has now tied the record (1.15C above 1991-2020 baseline) set on Nov 17 2023:
pulse.climate.copernicus.eu
pulse.climate.copernicus.eu
November 7, 2026 at 5:01 PM
We would expect the 2026 record to exceed the 2023 record by about 0.1C given the current planetary warming rate of ~0.3C/decade. We will see if that happens.
We now have two large planetary missions that are not based upon the science priorities established in the decadal surveys.
November 7, 2026 at 11:39 PM
We now have two large planetary missions that are not based upon the science priorities established in the decadal surveys.
Hi! I’m a planetary astronomer studying asteroids, involved in groundbased, JWST and spacecraft measurements of them. I was Investigation Lead for the #DARTMission, NASA’s first planetary defense test mission.
I also have a Starter Pack of other planetary scientists! 🧪🔭🛰️
go.bsky.app/SdZsrfw
I also have a Starter Pack of other planetary scientists! 🧪🔭🛰️
go.bsky.app/SdZsrfw
Lots of folks are joining BlueSky today!
Scientists of BlueSky, introduce yourselves and what you work on so new folks can follow you!
I’m David, I’m a marine biologist and author who studies ocean conservation, especially sharks, endangered species, and sustainable fisheries!
🧪🌎🦑🐟🦈 #SciComm
Scientists of BlueSky, introduce yourselves and what you work on so new folks can follow you!
I’m David, I’m a marine biologist and author who studies ocean conservation, especially sharks, endangered species, and sustainable fisheries!
🧪🌎🦑🐟🦈 #SciComm
November 6, 2026 at 2:16 AM
Hi! I’m a planetary astronomer studying asteroids, involved in groundbased, JWST and spacecraft measurements of them. I was Investigation Lead for the #DARTMission, NASA’s first planetary defense test mission.
I also have a Starter Pack of other planetary scientists! 🧪🔭🛰️
go.bsky.app/SdZsrfw
I also have a Starter Pack of other planetary scientists! 🧪🔭🛰️
go.bsky.app/SdZsrfw
Terra Flux starts as a traditional planetary exploration & morphs into a meditation on the nature of womanhood, humanity, & consciousness.
Yes, there’s T4T mechanical lesbian sex & T4T planetary lesbian sex!
There’s also a creature called “Spaghetti & Meatballs!”
danifinn.itch.io/terra-flux
Yes, there’s T4T mechanical lesbian sex & T4T planetary lesbian sex!
There’s also a creature called “Spaghetti & Meatballs!”
danifinn.itch.io/terra-flux
Terra Flux by danifinn
A mechanical lesbian romance
danifinn.itch.io
November 8, 2026 at 11:20 PM
Terra Flux starts as a traditional planetary exploration & morphs into a meditation on the nature of womanhood, humanity, & consciousness.
Yes, there’s T4T mechanical lesbian sex & T4T planetary lesbian sex!
There’s also a creature called “Spaghetti & Meatballs!”
danifinn.itch.io/terra-flux
Yes, there’s T4T mechanical lesbian sex & T4T planetary lesbian sex!
There’s also a creature called “Spaghetti & Meatballs!”
danifinn.itch.io/terra-flux
Learn more about LPL grad student Elana Alevy and her recent Wiley Award win. lpl.arizona.edu/news/elana-a...
Elana Alevy Wins 2026 Wiley Award for Presentation at the Meteoritical Society Meeting | Lunar and Planetary Laboratory & Department of Planetary Sciences
The Department of Planetary Sciences/Lunar and Planetary Laboratory is an academic institution that pursues scholarly research and education across the broad discipline of planetary and solar systems ...
lpl.arizona.edu
November 9, 2026 at 5:15 PM
Learn more about LPL grad student Elana Alevy and her recent Wiley Award win. lpl.arizona.edu/news/elana-a...
One landing party and one away team, both by Runa Ivana Rosenberger.
November 8, 2026 at 3:21 PM
One landing party and one away team, both by Runa Ivana Rosenberger.
Remembering American Astronomer, Planetary Scientist, Cosmologist, Astrophysicist, Astrobiologist, Author, Poet and Science Communicator Carl Sagan
November 9, 1934–December 20, 1996
November 9, 1934–December 20, 1996
November 9, 2026 at 2:23 PM
Remembering American Astronomer, Planetary Scientist, Cosmologist, Astrophysicist, Astrobiologist, Author, Poet and Science Communicator Carl Sagan
November 9, 1934–December 20, 1996
November 9, 1934–December 20, 1996
“Our fragile fossil fuel-based economy leaves us exposed to volatility and conflict, making an urgent, accelerated transition to renewable energy essential for both economic stability and planetary survival”
I discuss why #BAAJA is a problematic fossil fuel trojan horse in this new commentary for @thebulletin.org: thebulletin.org/2026/11/demo...
Democrats stayed quiet on climate. Now it's time to act
The climate crisis is an affordability issue.
thebulletin.org
November 9, 2026 at 3:10 AM
“Our fragile fossil fuel-based economy leaves us exposed to volatility and conflict, making an urgent, accelerated transition to renewable energy essential for both economic stability and planetary survival”
*in astronomy/astrophysics/planetary astronomy
November 9, 2026 at 2:18 PM
*in astronomy/astrophysics/planetary astronomy
We do NOT need a world government; we DO need planetary governance.
That distinction is absolutely crucial.
That distinction is absolutely crucial.
November 10, 2026 at 1:00 PM
We do NOT need a world government; we DO need planetary governance.
That distinction is absolutely crucial.
That distinction is absolutely crucial.
Jupiter spins once in under 10 hours, while Venus takes 243 Earth days and runs backwards. Here is how wildly planetary rotation speeds differ.
November 6, 2026 at 7:10 AM
Jupiter spins once in under 10 hours, while Venus takes 243 Earth days and runs backwards. Here is how wildly planetary rotation speeds differ.
If you write out the basic facts of trees, but framed as technology, it sounds like impossible sci-fi nonsense. Self-replicating, solar-powered machines that synthesize carbon dioxide and rainwater into oxygen and sturdy building materials on a planetary scale.
November 8, 2026 at 12:27 PM
If you write out the basic facts of trees, but framed as technology, it sounds like impossible sci-fi nonsense. Self-replicating, solar-powered machines that synthesize carbon dioxide and rainwater into oxygen and sturdy building materials on a planetary scale.
As part of my fellowship with @postgrowth.org, I got to write something a bit different, that had been in my mind for a while. Tetris was one of my favourite games growing up and I think it offers an interesting metaphor for planetary boundaries and cooperation.
Post-Growth Tetris: Changing the Rules of the Game
Exploring cooperation, collective wellbeing, and planetary boundaries through the unlikely lens of a classic video game.
postgrowth.medium.com
November 10, 2026 at 6:54 PM
As part of my fellowship with @postgrowth.org, I got to write something a bit different, that had been in my mind for a while. Tetris was one of my favourite games growing up and I think it offers an interesting metaphor for planetary boundaries and cooperation.
Astronomers spot white dwarf star with two rings of planetary debris reut.rs/47ZD9NA
Astronomers spot white dwarf star with two rings of planetary debris
Billions of years from now, the sun is expected to run out of fuel and greatly expand into what is called a red giant, eventually shedding its outer layers and leaving behind its dense core, a white dwarf. Some of the planets in our solar system would be destroyed while others might survive.
reut.rs
November 7, 2026 at 10:10 AM
Astronomers spot white dwarf star with two rings of planetary debris reut.rs/47ZD9NA
ESA/Hubble (@esa.int) images (Aug 24, 2001)
This Hubble image unveils a proto-planetary nebula, showcasing gas ejected by a dying star and the resulting supersonic shocks in vibrant colors.
esahubble.org/images/heic0111a/
This Hubble image unveils a proto-planetary nebula, showcasing gas ejected by a dying star and the resulting supersonic shocks in vibrant colors.
esahubble.org/images/heic0111a/
November 10, 2026 at 8:31 AM
ESA/Hubble (@esa.int) images (Aug 24, 2001)
This Hubble image unveils a proto-planetary nebula, showcasing gas ejected by a dying star and the resulting supersonic shocks in vibrant colors.
esahubble.org/images/heic0111a/
This Hubble image unveils a proto-planetary nebula, showcasing gas ejected by a dying star and the resulting supersonic shocks in vibrant colors.
esahubble.org/images/heic0111a/
WOOHOO!
Over at @eartharxivbot.bsky.social, *THE* preprint server for Earth & Planetary Science, we've just accepted our 8000th submission! 🥳
Over at @eartharxivbot.bsky.social, *THE* preprint server for Earth & Planetary Science, we've just accepted our 8000th submission! 🥳
November 6, 2026 at 7:03 PM
WOOHOO!
Over at @eartharxivbot.bsky.social, *THE* preprint server for Earth & Planetary Science, we've just accepted our 8000th submission! 🥳
Over at @eartharxivbot.bsky.social, *THE* preprint server for Earth & Planetary Science, we've just accepted our 8000th submission! 🥳