Key Information
Deneb
| Type | Star System |
| Diameter | 92,509,632 or 175,508,928 miles |
| Distance | 1,410 or 2,615 light years |
| Temperature | 15,200 °F |
| Star Type | A2 Ia – Blue supergiant |
| Date of Discovery | Unknown |
| Other Names | Arided, Aridif, Gallina, Arrioph, α Cygni, 50 Cygni, HD 197345, HIP 102098, HR 7924 |
| Mass | 15.5 or 19 M☉ |
Learning Point
- Deneb is a very bright star, so bright that it’s one of the 20 brightest stars we can see at night! It’s part of a group of stars called the constellation Cygnus, which looks like a swan flying across the sky. Deneb is like the tail of the swan. It’s also part of a special pattern of three bright stars called the Summer Triangle, which you can see easily in the summer. Even though Deneb looks like a regular bright star, it’s actually a huge and super bright star that is very far away from us!
Project
- Draw a comparison of Deneb compared to our Sun.
- Overview
- Summer Triangle
Location
| Located in | Cygnus constellation, within our Milky Way |
Fun Facts
- Even though it looks like a regular star, Deneb is much, much bigger than our Sun – about 200 times wider!
- Deneb is very far away, thousands of light-years, but it’s so bright we can still see it clearly.
- Its name “Deneb” actually means “tail” in Arabic, because of its place at the end of the Cygnus constellation.
- Deneb is a super bright star, one of the top 20 brightest in the night sky!
Past Lessons
| 246 | January 5, 2026 | (North America) |