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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.

See Explanation. Clicking on the picture will download the highest resolution version available.

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.