Betelgeuse: how big is it?
Betelgeuse is about 1.06 billion km. In everyday terms, that is ≈ 762 Suns.
- Size
- 1.06 billion km
- In metres
- 1.06 × 10¹² m
- Everyday comparison
- ≈ 762 Suns
- Chapter
- Stars
Did you know?
A red supergiant in Orion. Put it where the Sun is and it would swallow everything out past Mars.
How it compares
- About 7.1× bigger than Earth → Sun distance (150 million km).
- About 8.5× smaller than Neptune's orbit (9 billion km).
Other things of a similar size
- The Sun 1.39 million km
- Sirius 2.38 million km
- Sagittarius A* (black hole) 24 million km
- Arcturus 35 million km
- Earth → Sun distance 150 million km
- Neptune's orbit 9 billion km
Sizes are rounded, typical values drawn from standard reference sources, including NIST/CODATA physical constants and NASA's planetary fact sheets. Real objects vary; see About for how sizes are chosen.