Star
One of the most luminous stars known, a blue-white supergiant marking the tail of the constellation Cygnus.
| Type | Star |
|---|---|
| Distance from Earth | 2,620 ly |
| Diameter | 282,000,000 km |
| Mass | 3.78 × 10³¹ kg |
| Temperature | 8,252°C |
| Apparent magnitude | 1.25 |
| Redshift | 0 |
| Hemisphere | Northern |
| 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 282,000,000 km across, Deneb is 202 times the diameter of the Sun.
Its mass is 19 times the mass of the Sun.
The light reaching us from Deneb tonight left it around 2,615 years ago.
Its surface sits at 8,525 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