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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.
Superbubbles in the LMC
Explanation: Why is there a hole in the center of this nebula? A leading explanation is that it is caused by the stellar winds from the stars that live there. Stars - including the Sun - expel electrons, protons, and other charged ions in a steady stream - the stellar wind . The wind ions push out the normal hydrogen and helium gas found glowing in the nebula. This star forming region is located in the Large Magellanic Cloud . This picture is a composite of three separate photographs, each sensitive to only one specific color of light - a color that distinguishes a specific chemical element . It is currently not known why stars emit a stellar wind.
| Date | July 3, 1996 |
|---|---|
| Credit | Credit and Copyright: C. Smith (U. Michigan), Curtis Schmidt Telescope, CTIO, Chile |
| Authors & editors: | Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) |
| A service of: |
ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U. |