Astronomers discover a super-Neptune with the lowest density ever found
Astronomers have identified TOI-1883 b, a super-Neptune exoplanet with an exceptionally low density of 0.4 g/cm³. Located 383 light-years away, the planet orbits a red dwarf and may have lost mass due to stellar radiation.
Why it matters
This discovery challenges existing models of planetary formation and migration, providing new data on how exoplanets evolve near their host stars.
NASA - Unsplash An image showing an exoplanet and a star in the universe. Astronomers have discovered a super-Neptune with one of the lowest densities ever found. But while this discovery is important, further studies will need to be conducted to better understand this celestial object. Alexis Stegmann , Published 06/15/2026 Astronomy / Space Science 4 Reviews exclude selected types exclude selected tags There are many planets in the universe , each with different compositions and shapes. This is the case for TOI-1883 b , a super-Neptune discovered in 2024 by some astronomers. Located about 383 light-years from Earth, this exoplanet orbits a red dwarf named TOI-1883 every 4.5 days. However, uncertainties remained regarding its mass.
The article is a straightforward report on scientific findings without political or social commentary.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in