Celestia
- Simulation
Game
Celestia
brighten the world with your light and love
A real-time 3D space simulator and interactive planetarium. Travel to any planet, moon, star, or galaxy and view it from any point in space and time. Accelerate time, land on alien worlds, and expand the universe with community-made add-ons.
About Celestia
Where to get it
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
- Mods indexed
- 37
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
of 822 on Steam Workshop
Most downloaded
Measured from the source's own counts, summed across every release.
- TrES-1TrES-1, also known as TOI-1236 and GSC 02625-01324, is a binary star system composed of a K-type main-sequence star and a red dwarf, located in the constellation Lyra, about 523 light-years from the Solar System. Component A has a hot Jupiter, which completes an orbit in just 3 Earth days. By Sol...79 downloads
- Binary Star CatalogThis is a large add-on, and modifies about 210 binary systems. In the default version of Celestia, these are rendered as single stars or two stars not orbiting each other, but these have been modified so that they orbit each other. In cases where there are multiple stars, as many stars that have...53 downloads
- Kepler-443Kepler-443, aka KOI-4745, is a K-type dwarf star located about 2,677 lightyears from the solar system. A single mini-Neptune (b= 2.35 Re) orbits within the star's habitable zone, the mass of this planet is unknown currently. This add-on was initially made by SolHorizon, who depicted the planet as...41 downloads
- JunoJuno is an active NASA spacecraft currently in polar orbit around Jupiter since July 2016, the second spacecraft to do so after Galileo. Launched in August 2011, its mission is to measure Jupiter's composition, gravitational field, magnetic field, and polar magnetosphere. It also performed flybys...21 downloads
- 14 Herculis14 Herculis, also known as Gliese 614, is a K-type main sequence star about 58.38 light-years away in the constellation Hercules. It has two cold super-jovian planets known, both revolving in very chaotic eccentric orbits By SpaceStalker20 downloads
- Cygnus X-3Cygnus X-3 is a high-mass X-ray binary (HMXB) located about 24,124±3,586 light-years away in the constellation Cygnus. It is often considered to be a microquasar, and it is believed to be a compact object in a binary system which is pulling in a stream of gas from an ordinary star companion. By L...18 downloads
- Cha 110913−773444Cha 110913−773444 is either a sub-brown dwarf or a rogue planet about 529 light-years in the constellation Chamaeleon. Like OTS 44, it is surrounded by a protoplanetary disk about 6.0 AU across By Trolligi18 downloads
- NGC 4361NGC 4361 is a planetary nebula about light-years in the constellation Corvus. Its central star is a very young and extremely hot Wolf-Rayet star only about ~1,230 years old and temperatures reaching 270,000 K, one of the hottest non-neutron stars ever known By Trolligi17 downloads
- Red Giant SunA depiction of the Solar System 7.9 billion years from now, when the Sun has reached its maximum size as a red giant. Taken from Celestia Origin, with a red giant model & texture by nussun added. By Frank Gregorio, Zemlyanin, Art Blos, nussun16 downloads
- IRAS 19041+0902 (MN 102)MN 102 is a WC-type star surrounded by a nebula about 11,036 light-years away in the constellation Aquila By Trolligi, Gurren Lagann16 downloads
- TOI-1338TOI-1338 is an eclipsing binary comprised of an F-type main sequence star and a red dwarf located about 1,320 lightyears from the solar system. Two planets are currently known to orbit both stars in this system, the inner one being a transiting Neptune mass, sub-Saturn sized gas giant and the out...16 downloads
- Tselina-2The Tselina-2 fleet were a series of Soviet/Russian spy satellites that was in operation in LEO between 1984 and 2008. A total of 23 satellites were launched, 18 of which were successful, each of them had a design life of at least a year. All satellites are no longer active since 2008 By DaveBowm...16 downloads
- Gliese 900Gliese 900 is a triple star system consisting of one K-type main sequence star and two red dwarfs about 68 light-years away in the constellation Pisces. All three stars in the system were orbited by a single superjovian planet nearly 11 times more massive than Jupiter, which (at a distance of 0.2...15 downloads
- 433 Eros433 Eros is a large stony asteroid of the Amor group. Discovered in 1898, it is the first near-Earth asteroid ever discovered, and also the second-largest known at 16.8 km (10.4 mi) in diameter. It was extensively studied by NASA's NEAR Shoemaker mission between 1999 and 2001, becoming the first...15 downloads
- Brown Dwarf CatalogThis catalog includes a grand total of 2819 ultra-cool dwarfs, spanning from the late M-type main sequence stars, to L, T and Y-type brown dwarfs. Over a hundred of them are actually binary systems, and three are triple, rendered here with approximate parameters. By pedro_jg15 downloads
- Abell 1This add-on adds a realistic, fully 3D model of the planetary nebula Abell 1. Abell 1 is a very simple planetary nebula. Unfortunately its shape is not very well known; this is just a best guess based on available astrophotographs. By LukeCEL15 downloads
- M 20 (Trifid Nebula)The Trifid Nebula (catalogued as Messier 20 or NGC 6514) is an H II region in the north-west of Sagittarius in a star-forming region in the Milky Way's Scutum-Centaurus Arm, which is about 4100±200 light-years distant. The object is an unusual combination of an open cluster of stars, an emission...14 downloads
- TrES-2 (by trappistplanets)TrES-2 Ab is an exoplanet orbiting the star TRES-2 A located 750 light years away from the Earth. The planet has been identified in 2011 as the darkest known exoplanet, reflecting less than 1% of any light that hits it. This system was within the field of view of the Kepler space telescope. TrES-...14 downloads
- 1 CeresCeres is a dwarf planet located in the main asteroid belt, between the orbits of Mars and Jupiter. Discovered in 1801 by Giuseppe Piazzi, it was initially considered a planet, later an asteroid, and finally a dwarf planet. Ceres was extensively studied by NASA's Dawn spacecraft between 2015 and 2...13 downloads
- PK 164+31.1 (Headphone Nebula)Jones-Emberson 1 (PK 164+31.1), also known as the Headphone Nebula, is a 14th magnitude planetary nebula in the constellation Lynx at a distance of 1,600 light years. The 16.8-magnitude central star is a very blue white dwarf By gradius_fanatic13 downloads
- Voyager 1 and 2Voyager 1 and 2 were twin NASA spacecraft that explored all the outer planets in the Solar System from 1979 to 1989, following the success of Pioneer 10 and 11. After completing the only flybys of Uranus and Neptune to this day, both Voyagers became the first active spacecraft to reach interstell...13 downloads
- New HorizonsNew Horizons is a NASA/APL space probe that was launched as a part of NASA's New Frontiers program. It was launched in 2006-Jan-19, with the primary mission to perform a flyby study of the Pluto system in July 2015, and a secondary mission to flyby and study one or more other Kuiper Belt Objects...13 downloads
- WASP-34WASP-34, also known as Amansinaya, is a G-type star located about 391 light-years from Earth. It has two gas giant planets, one being a hot Jupiter and the other a cold Jupiter or a low-mass brown dwarf. By Galaxy-Leaper13 downloads
- 51 Pegasi51 Pegasi, formally named Helvetios, is a Sun-like star located 50.45 light-years from Earth in the constellation of Pegasus. It was the first main-sequence star found to have an exoplanet (later named Dimidium) orbiting it, which was the first hot Jupiter to be discovered. This addon includes a...13 downloads
Browse all 37 Celestia mods Sortable by downloads, rating and date.
More simulation games see all
Why Celestia mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host Celestia mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.