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.
The Circinus Galaxy
Explanation: Powerful forces are at play in the nearby Circinus Galaxy. Hot gas, colored pink, is being ejected out of the spiral galaxy from the central region. Much of Circinus ' tumultuous gas, however, is concentrated in two rings. The outer ring, located about 700 light-years from the center, appears mostly red and is home to tremendous bursts of star formation . A previously unseen inner ring , inside the green disk above, is visible only 130 light years from the center on this recently released, representative color image taken by the Hubble Space Telescope . At the very center is an active galactic nucleus , where matter glows brightly before likely spiraling into a massive black hole . Although only 15 million light years distant, the Circinus Galaxy went unnoticed until 25 years ago because it is so obscured by material in the plane of our own Galaxy . The galaxy can be seen with a small telescope, however, in the constellation of Circinus .
| Date | December 4, 2000 |
|---|---|
| Credit | Credit: Andrew S. Wilson ( U. Maryland ) et al., WFPC2 , HST , NASA |
| Authors & editors: | Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) |
| A service of: |
ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U. |



