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APOD
Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Bright Star Regulus near the Leo I Dwarf Galaxy
Explanation: The star near the top is so bright that it is sometimes hard to notice the galaxy toward the bottom. Pictured above , both the star, Regulus , and the galaxy, Leo I , can be found within one degree of each other toward the constellation of the Lion (Leo). Regulus is part of a multiple star system , with a close companion double star visible to the lower left of the young main sequence star. Leo I is a dwarf spheroidal galaxy in the Local Group of galaxies dominated by our Milky Way Galaxy and M31 . Leo I is thought to be the most distant of the several known small satellite galaxies orbiting our Milky Way Galaxy. Regulus is located about 75 light years away, in contrast to Leo 1 which is located about 800,000 light years away.
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| Date | January 10, 2012 |
|---|---|
| Credit | Credit & Copyright: Chris Cook ( CookPhoto.com ) |
| Authors & editors: | Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) |
| A service of: |
ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U. |