Star
A blue-white giant and the brightest star in Corvus, marking the wing of the crow.
| Type | Star |
|---|---|
| Distance from Earth | 154 ly |
| Diameter | 5,570,720 km |
| Mass | 8.35 × 10³⁰ kg |
| Temperature | 11,727°C |
| Apparent magnitude | 2.59 |
| Redshift | 0 |
| Hemisphere | Southern |
| Discovered | 150 |
Stars spend most of their lives fusing hydrogen into helium in their core, and it's the balance between that outward pressure and gravity pulling inward that fixes how big and how bright a star gets.
At 5,570,720 km across, Gienah is 4.0 times the diameter of the Sun.
Its mass is 4.2 times the mass of the Sun.
The light reaching us from Gienah tonight left it around 154 years ago.
Its surface sits at 12,000 K, hotter than the Sun at 5,772 K, which is what sets its colour.
It has been on record since the year 150.
Play today's Cosmodle