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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 Universe Nearby

Explanation: What does the universe nearby look like? This plot shows over one and a half million of the brightest stars and galaxies in the nearby universe detected by the Two Micron All Sky Survey (2MASS) in infrared light . The resulting image is an incredible tapestry of stars and galaxies that provides limits on how the universe formed and evolved . Across the center are stars that lie in the plane of our own Milky Way Galaxy . Away from the Galactic plane, vast majority of the dots are galaxies , color coded to indicate distance, with blue dots representing the nearest galaxies in the 2Mass survey, and red dots indicating the most distant survey galaxies that lie at a redshift near 0.1. Named structures are annotated . Many galaxies are gravitationally bound together to form clusters , which themselves are loosely bound into superclusters , which in turn are sometimes seen to align over even larger scale structures .

Date December 11, 2007
Credit Credit & Copyright: 2MASS , T. H. Jarrett , J. Carpenter, & R. Hurt
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.