# Exoplanet GJ 3378b discovery and habitability

> Live situation record from CLSTR: https://clstr.news/situations/exoplanet-gj-3378b-discovery-and-habitability
> Updated: 2026-08-20T07:47:39.000Z. Sources: 4. Developments: 2.

Astronomers have identified a potentially habitable rocky exoplanet, GJ 3378b, located approximately 25 light-years from our solar system. The planet is roughly twice the size of Earth and orbits within the habitable zone of a cool red dwarf star, suggesting temperatures that could support liquid water.

Researchers have expressed uncertainty regarding the planet’s atmosphere, noting that intense radiation from its parent star might strip it away. This condition places the planet near the ‘cosmic shoreline’.

## Timeline

### 2026-08-20: Exoplanet GJ 3378b discovered near solar system

Astronomers have discovered GJ 3378b, a rocky exoplanet twice the size of Earth located 25 light-years away that orbits within its star's habitable zone.

2 sources. https://clstr.news/cluster/exoplanet-gj-3378b-discovered-near-solar-system

### 2026-08-17: Exoplanet GJ 1252b may lack a significant atmosphere

A study indicates that the exoplanet GJ 1252b, located 66.5 light-years away, may lack a significant atmosphere, impacting research into planetary habitability.

2 sources. https://clstr.news/cluster/exoplanet-gj-1252b-may-lack-a-significant-atmosphere

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Cite as: Exoplanet GJ 3378b discovery and habitability. CLSTR, https://clstr.news/situations/exoplanet-gj-3378b-discovery-and-habitability