Celestia
@celestiaproject.bsky.social
The free and open-source real-time space simulator that lets you explore our universe in three dimensions. Available on Windows, macOS, Linux, Android, and iOS
https://celestiaproject.space
https://celestia.mobi
https://github.com/CelestiaProject/Celestia
https://celestiaproject.space
https://celestia.mobi
https://github.com/CelestiaProject/Celestia
The current trend in our Discord server is to use Celestia's MultiView feature and disable the frame outlines to create unique screenshots. MessisUniverse took this screenshot of Saturn's major moons, for example
March 23, 2025 at 11:35 PM
The current trend in our Discord server is to use Celestia's MultiView feature and disable the frame outlines to create unique screenshots. MessisUniverse took this screenshot of Saturn's major moons, for example
#OnThisDay 24 years ago, @claurel.bsky.social released Celestia to the public
February 27, 2025 at 12:16 PM
#OnThisDay 24 years ago, @claurel.bsky.social released Celestia to the public
Preview of the new default ISS model, serving as the replacement for Andrew Farnaby's ISS model that was recently removed as there is no licensing information available. Subject to change
Original model created by NASA-VTAD on the 22nd of April 2019
Edited by popular add-on creator DaveBowman2001
Original model created by NASA-VTAD on the 22nd of April 2019
Edited by popular add-on creator DaveBowman2001
November 22, 2024 at 12:44 AM
Preview of the new default ISS model, serving as the replacement for Andrew Farnaby's ISS model that was recently removed as there is no licensing information available. Subject to change
Original model created by NASA-VTAD on the 22nd of April 2019
Edited by popular add-on creator DaveBowman2001
Original model created by NASA-VTAD on the 22nd of April 2019
Edited by popular add-on creator DaveBowman2001
Bluesky now has DM capabilities, so we've set ours to be open to everyone. If you have a bug report, feature request, question about the program, or maybe even an idea for a post, just message us!
May 24, 2024 at 7:33 AM
Bluesky now has DM capabilities, so we've set ours to be open to everyone. If you have a bug report, feature request, question about the program, or maybe even an idea for a post, just message us!
Some of our Discord server members were able to spot the aurorae that occurred as a result of the solar storm a few days ago!
Did you manage to snap a few pictures?
Did you manage to snap a few pictures?
May 15, 2024 at 5:15 AM
Some of our Discord server members were able to spot the aurorae that occurred as a result of the solar storm a few days ago!
Did you manage to snap a few pictures?
Did you manage to snap a few pictures?
Lux has made some more nebulae models, these four here are nearby H II regions! Can you name them all?
April 26, 2024 at 12:47 PM
Lux has made some more nebulae models, these four here are nearby H II regions! Can you name them all?
This is Earth. Our pale blue dot
On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives
This #EarthDay, we are again reminded of our planet's fragility, and our responsibility to cherish it, care for it, and protect it
On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives
This #EarthDay, we are again reminded of our planet's fragility, and our responsibility to cherish it, care for it, and protect it
April 22, 2024 at 11:58 AM
This is Earth. Our pale blue dot
On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives
This #EarthDay, we are again reminded of our planet's fragility, and our responsibility to cherish it, care for it, and protect it
On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives
This #EarthDay, we are again reminded of our planet's fragility, and our responsibility to cherish it, care for it, and protect it
Did you know you can change Celestia's display font? Simply place the font you want to use into the fonts folder (in this example I used Futura), and edit the celestia.cfg file to make it use your font
It's worth noting that some fonts may not support certain characters
It's worth noting that some fonts may not support certain characters
April 16, 2024 at 1:26 AM
Did you know you can change Celestia's display font? Simply place the font you want to use into the fonts folder (in this example I used Futura), and edit the celestia.cfg file to make it use your font
It's worth noting that some fonts may not support certain characters
It's worth noting that some fonts may not support certain characters
Some more screenshots of Lux's nebulae models
April 16, 2024 at 1:24 AM
Some more screenshots of Lux's nebulae models
Lux, the creator of a few cinematic Celestia videos on YouTube, is talented in more ways than just videography, as they also make gorgeous nebulae models!
These ones here will soon be available for download as add-ons, I'll post the link once that happens
These ones here will soon be available for download as add-ons, I'll post the link once that happens
April 11, 2024 at 12:34 PM
Lux, the creator of a few cinematic Celestia videos on YouTube, is talented in more ways than just videography, as they also make gorgeous nebulae models!
These ones here will soon be available for download as add-ons, I'll post the link once that happens
These ones here will soon be available for download as add-ons, I'll post the link once that happens
So we've got another graphical overhaul in the works. This time we're making the star glow more realistic by simulating proper limb darkening. It's not very realistic just yet but hopefully that will change. We'll notify you if we ever need people to test it
January 6, 2024 at 9:24 AM
So we've got another graphical overhaul in the works. This time we're making the star glow more realistic by simulating proper limb darkening. It's not very realistic just yet but hopefully that will change. We'll notify you if we ever need people to test it
It's Christmas so we thought we'd surprise you with something. We're experimenting with 3D terrain. Yep, 3D terrain like you'd see in SpaceEngine
It's by no means complete and probably won't be for a while. Keep an eye on our account so you'll know if we ever need people to test it
It's by no means complete and probably won't be for a while. Keep an eye on our account so you'll know if we ever need people to test it
December 25, 2023 at 6:16 AM
It's Christmas so we thought we'd surprise you with something. We're experimenting with 3D terrain. Yep, 3D terrain like you'd see in SpaceEngine
It's by no means complete and probably won't be for a while. Keep an eye on our account so you'll know if we ever need people to test it
It's by no means complete and probably won't be for a while. Keep an eye on our account so you'll know if we ever need people to test it
I finally just got access to TweetDeck again. Today is a good day
November 15, 2023 at 3:26 AM
I finally just got access to TweetDeck again. Today is a good day
Stars in Celestia aren't just textured, coloured balls with a glow, and nebulae aren't just 2D "billboard" models. They can look a lot prettier, and a lot trippier...
November 15, 2023 at 1:25 AM
Stars in Celestia aren't just textured, coloured balls with a glow, and nebulae aren't just 2D "billboard" models. They can look a lot prettier, and a lot trippier...
There's not really been much major development lately, mainly just refactoring parts of the code and fixing a weird bug with planetary rings. Though we are working on further refining our translations, so non-English speakers can enjoy using Celestia in their first language!
November 15, 2023 at 12:55 AM
There's not really been much major development lately, mainly just refactoring parts of the code and fixing a weird bug with planetary rings. Though we are working on further refining our translations, so non-English speakers can enjoy using Celestia in their first language!
Just a little update on this...
Askaniy has further optimized and improved the code, and our lead developer is attempting to convert the Python code into GLSL so it can be tested in Celestia itself. The updated information and code is still available in this GitHub issue
Askaniy has further optimized and improved the code, and our lead developer is attempting to convert the Python code into GLSL so it can be tested in Celestia itself. The updated information and code is still available in this GitHub issue
October 26, 2023 at 12:57 AM
Just a little update on this...
Askaniy has further optimized and improved the code, and our lead developer is attempting to convert the Python code into GLSL so it can be tested in Celestia itself. The updated information and code is still available in this GitHub issue
Askaniy has further optimized and improved the code, and our lead developer is attempting to convert the Python code into GLSL so it can be tested in Celestia itself. The updated information and code is still available in this GitHub issue
Celestia's star rendering doesn't model the difference in brightness accurately, which became more apparent with gamma correction. To address this, one of our community members, Askaniy, created a new rendering algorithm
If you're interested, you can read more into his work here
If you're interested, you can read more into his work here
October 22, 2023 at 2:33 AM
Celestia's star rendering doesn't model the difference in brightness accurately, which became more apparent with gamma correction. To address this, one of our community members, Askaniy, created a new rendering algorithm
If you're interested, you can read more into his work here
If you're interested, you can read more into his work here
We've got an Instragram account now, go follow us on there if you're interested
October 19, 2023 at 10:30 PM
We've got an Instragram account now, go follow us on there if you're interested
Our solar system is an amazing place
October 6, 2023 at 6:58 AM
Our solar system is an amazing place
The Pleiades star cluster looming behind Saturn
October 5, 2023 at 12:08 PM
The Pleiades star cluster looming behind Saturn
Another beautiful moon from this project! Likely to get a texture rework in the future, though, so admire it while it lasts
October 4, 2023 at 12:08 AM
Another beautiful moon from this project! Likely to get a texture rework in the future, though, so admire it while it lasts
The spacecraft Lucy passing by the asteroid Dinkinesh, on the 1st of November this year
October 3, 2023 at 9:28 AM
The spacecraft Lucy passing by the asteroid Dinkinesh, on the 1st of November this year