Science ❯ Astronomy ❯ Celestial Bodies

Dwarf Planets

Pluto Ceres 2017 OF201 Sedna Trans-Neptunian Objects

Six-Planet Parade Continues as Mercury Rises and Moon Approaches

Skywatchers can see Venus and Jupiter drift apart as Mercury nears greatest elongation, with a crescent Moon due later this week.

New Distant Sednoid ‘Ammonite’ Casts Doubt on Planet Nine Hypothesis

New Dwarf Planet Discovery Challenges Planet Nine Despite 40% Simulated Odds