Celestia

Celestia mobile 1.9.9 for Android devices has been released. This update includes content updates, more realistically coloured comet tails, a new info display with more information, and fixes textures for oblate objects.
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See Explanation. Clicking on the picture will download the highest resolution version available.

🔭 Roses are Red

Image Credit & Copyright: Raffaele Calcagno

Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)

apod.nasa.gov/apod/ap26021...

Celestia mobile 1.9.8 for Apple devices has been released. This update includes content updates and fixes crashes caused by bad cmod models.
Full changelog and download available on GitHub

Celestia mobile 1.9.8 for Android devices has been released. This update includes content updates, fixes crashes caused by bad cmod models, and adds support for external displays.
Full changelog and download available on GitHub

Celestia mobile 1.9.7 for Apple devices has been released. This update includes content updates, and fixes conflicting add-on textures.
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Celestia mobile 1.9.7 for Android devices has been released. This update includes content updates, and fixes conflicting add-on textures.
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Celestia mobile 1.9.6 for Apple devices has been released. This update fixes the run script function not working for add-ons with scripts, and fixes screen capture not working when MSAA is enabled.
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Celestia mobile 1.9.5 for Apple devices has been released. This update includes content updates, makes open clusters no longer pickable, and Celestia PLUS users can now view add-on updates from Installed Add-ons.
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Celestia mobile 1.9.5 for Android devices has been released. This update includes content updates, makes open clusters no longer pickable, and Celestia PLUS users can now view add-on updates from Installed Add-ons.
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I'm sure I have come across one, I just can't find any screenshots, if there even are any. Oh well, have this purple gas giant I found!

Graphical user interface of Cylindrical Texture Calibrator

Recently updated Cylindrical Texture Calibrator, a Python utility with a GUI that was developed to help the @celestiaproject.bsky.social community with ongoing updates (we need more devs, by the way!). I've included some interesting details in the thread.
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The good old days...

Happy New Year from all of us at Celestia! This year will be a big year for spaceflight and astronomy, and Celestia too.

Celestia mobile 1.9.3 for Apple devices has been released. This update includes content updates, catalog lookup fixes and an update button for add-ons that have updates.
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Celestia mobile 1.9.3 for Android devices has been released. This update includes content updates, catalog lookup fixes and an update button for add-ons that have updates.
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An image of space made by the Euclid telescope shows a bright barred spiral galaxywith two sweeping arms glowing in shades of blue and white against a deep black background dotted with stars. Its core is luminous. Its spiral arms curve gracefully outward to the left and down to the right, resembling a cosmic garland draped across the scene. A smaller, faint and round galaxy appears to the left of the barred spiral galaxy.

🎄 Are your holiday decorations ready? Euclid has a cosmic garland to add: NGC 646.

The large barred spiral galaxy appears close to a smaller galaxy to the left, but they’re actually about 45 million light-years apart 👉 https://www.esa.int/ESA_Multimedia/Images/2025/12/Euclid_s_galaxy_garland
🔭

I also personally think Celestia should be worked on more until it's a much more fleshed-out program before working on native VR support. 1.7.0 has already been in development for over half a decade, we don't need to make the scope even larger

It'd be great if we could develop for VR as well, I see a lot of potential with the Frame. Sadly we really only have like 3 developers who aren't always able to work, and acquiring hardware for testing is another problem. Although, Lev was able to make a Vision Pro port with the visionOS simulator

This magnificent extragalactic skyscape looks toward the Andromeda Galaxy, the closest large spiral galaxy to the Milky Way. It also accomplishes a Messier catalog trifecta by including Andromeda, cataloged as Messier 31 (M31), along with Messier 32 (M32), and Messier 110 (M110) in the same telescopic field of view. In this frame, M32 is just left of the Andromeda Galaxy's bright core with M110 below and to the right. M32 and M110 are both elliptical galaxies themselves and satellites of the larger spiral Andromeda. By combining 60 hours of broadband and narrowband image data, the deep telescopic view also reveals tantalizing details of dust lanes, young star clusters, and star-forming regions along Andromeda's spiral arms, and faint, foreground clouds of glowing hydrogen gas. For now, Andromeda and friends are some 2.5 million light-years from our own large spiral Milky Way.

🔭 Andromeda and Friends

Image Credit & Copyright: Piotr Czerski

apod.nasa.gov/apod/ap25111...

Celestia mobile 1.9.2 for Apple devices has been released. This is a content update.
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Celestia mobile 1.9.2 for Android devices has been released. This is a content update.
Download from GitHub

A dark sky shows bright comet with its tails extending diagonally from the lower left. Two tails are visible for the comet -- a long blue tail and a shorter wider white tail. Oddly, a wiggly tan stream appears to be a third tail -- but is actually the dust from a dissipated meteor. Please see the explanation for more detailed information.

🔭 Two Tails of Comet Lemmon

Image Credit: Massimo Penna

star.ucl.ac.uk/~apod/apod/a...

A mere 390 light-years away, Sun-like stars and future planetary systems are forming in the Rho Ophiuchi molecular cloud complex, the closest star-forming region to our fair planet. The James Webb Space Telescope's NIRCam peered into the nearby natal chaos to capture this infrared image at an inspiring scale. The frame spans less than a light-year across the Rho Ophiuchi region and contains about 50 young stars. Brighter stars clearly show Webb's characteristic pattern of diffraction spikes. Huge jets of shocked molecular hydrogen blasting from newborn stars are red in the image, with the large, yellowish dusty cavity carved out by the energetic young star near its centre. Near some stars in the stunning image are shadows cast by their protoplanetary disks. The spectacular cosmic snapshot was released in 2023 to celebrate the successful first year of Webb's exploration of the Universe.

🔭 Webb's Rho Ophiuchi

Image Credit: NASA, ESA, CSA, STScI, Klaus Pontoppidan (STScI),

www.star.ucl.ac.uk/~apod/apod/a...

Just did!

Well let's be real, it doesn't look good if it doesn't run well

Celestia mobile 1.9.1 for Apple devices has been released. This is a content update which also adds support for iOS/iPadOS/macOS 26. Version 1.9.0 for Apple devices had the same changelog.
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Celestia mobile 1.9.0 for Android devices has been released. This is a content update.
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Celestia mobile 1.8.9 for Android devices has been released. This update fixes a bug where the 'Go' button would be missing on installed add-ons.
Full changelog and download available on GitHub

Celestia mobile 1.8.8 for Apple devices has been released. This update includes content updates, a new camera setting, bugfixes and general improvements.
Full changelog and download available on GitHub

Celestia mobile 1.8.8 for Android devices has been released. This update includes content updates, a new camera setting, bugfixes and general improvements.
Full changelog and download available on GitHub