Celestia Forums

This addon adds 1,009 real stars in the small, irregular Local Group galaxy UGC 4879, located nearly 4.5 million light years away in Ursa Major.

el galaksey


Credits to nussun for the red giant and red bright giant textures

This addon adds 72 real stars in the Sagittarius Dwarf Irregular Galaxy viewtopic.php?p=163186#p163186

This addon adds 72 real stars in the Sagittarius Dwarf Irregular Galaxy, consisting of 17 carbon stars, 45 red giants, 1 very weird AGB star, and some massive young stars, including a G-type red supergiant. There is comparatively little information on the stellar population of this tiny galaxy in ge...

Re-uploaded the CHSS stars file since I noticed a problem with the declinations listed

PSR J1555-2908
A Mercury-mass world orbiting a black widow system containing a millisecond pulsar

The planet


The black widow system itself


Credits for LukeCEL for the tail model and cubicApoc for some of the textures used

Download

This addon adds 738 blue stars detected by the Century Survey Galactic Halo Project, mostly within the galactic halo, although some are very close and some are located dozens of kiloparsecs from the Sun, in intergalactic space.

This addon adds 21 binary systems containing neutron stars described by El-Badry et al. 2024 (https://arxiv.org/abs/2405.00089), including the stellar system known as Gaia NS1.

Four such systems from 20 AU away. Gaia NS1 is the top right system

This addon adds the planetary nebula DS 1, located about 2,700 light years away in Vela. The nebula houses the triple star system KV Velorum, composed of a tight binary of a blue subdwarf and red dwarf, orbited by a relatively massive brown dwarf every 29.5 years on an eccentric orbit. DS 1 DS1.png ...

Updated KMT-2020-BLG-0414L, as the primary star of the binary system has been confirmed to be a white dwarf

viewtopic.php?p=158842#p158842

This addon adds 714 real stars in the nearby galaxy NGC 3109

viewtopic.php?p=162739#p162739

This addon adds 714 real stars in NGC 3109, a small one-armed spiral galaxy on the edge of the Local Group. It also adds many HII regions and planetary nebulae within the galaxy. Credits to Nussun for the red giant, red supergiant, AGB and carbon star models and textures NGC 3109 ngc3109.png NGC 310...

2MASS J2117-2940 A nearby sub-brown dwarf with a transiting sub-Earth "exomoon" 2MASS J21171431-2940034 is a 7-Jupiter-mass T0-type sub-brown dwarf located just over 62 light years away, in the Beta Pictoris moving group. In 2024, a transit signal was observed, suggesting the existence of...

This addon adds the post-AGB (likely binary) star U Equulei, located about 4 kpc away. U Equulei has been brightening over the last 3 decades, which has led to some speculation as to why. The most likely explanation is that U Equulei has been accreting material from a circumbinary disk recently, lea...

This addon, made mostly by Lux HMT and finished by me, adds the Cat's Eye Nebula, a planetary nebula in Draco.

Unfortunately the nebula is not in the exactly correct orientation

The nebula

This addon adds the entire Corona Australis Molecular Cloud, as well as most of its young stars. The cloud is located at about 149.4 parsecs away. The cloud also contains a very young star cluster, the Coronet Cluster. CrA cloud corona australis.png Download Corona Australis.zip

I released the CB54 molecular cloud in GA-MSCHIIR

viewtopic.php?p=158690#p158690

This addon adds some star-forming regions within the Leo Ring, a huge 650,000 light year wide ring of intergalactic gas surrounding the Leo Group of galaxies, described in https://ui.adsabs.harvard.edu/abs/2021A%26A...651A..77C/abstract . It's all estimated to be about 11 Mpc away. The addon adds se...

This addon adds SECCO 1, or at least its most massive and bright stars. SECCO 1 is a blue blob, a small intergalactic hydrogen cloud that is now undergoing starburst. These hydrogen clouds were probably stripped off a nearby galaxy as it entered the Virgo cluster, where SECCO 1 is located. SECCO 1 i...

This small addon adds the GAFO Region, a small star-forming nebula, located in the Virgo Cluster. Its projected distance from NGC 4438 is almost 60,000 light years, meaning it's basically in intergalactic space. A star cluster inside the nebula has also been detected but due to floating point errors...

Please redownload the Bug Nebula if you've already downloaded it - I uploaded a new version with the correct orientation of the nebula

Added after 3 hours 42 minutes:
Also redid the Ring Nebula - redownload that if you'd like