Caldwell 103
C103
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Object
- Type (NASA)
- Nebula
- Distance from Earth
- 170,000 light-years
- Apparent magnitude
- 4 mag
- NASA description
- Better known as the Tarantula Nebula or 30 Doradus, Caldwell 103 the brightest star-forming region in our galaxy.
Source:NASA Hubble (Messier/Caldwell catalogs) · checked 2026-11-02 ↗
Related
Constellation
In everyday life
- Light from this object takes about 170,000 years to reach Earth — the light you see tonight left 170,000 years ago (official distance ÷ speed of light).
- At magnitude 4 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- It lies in Dorado — find the constellation first to know where to look.