Credit: NASA/JPL-Caltech/S. Stolovy (SSC/Caltech)

A Cauldron of Stars at the Galaxy's Center

This dazzling infrared image from NASA's Spitzer Space Telescope shows hundreds of thousands of stars crowded into the swirling core of our spiral Milky Way galaxy. In visible-light pictures, this region cannot be seen at all because dust lying between Earth and the galactic center blocks our view.

In this false-color picture, old and cool stars are blue, while dust features lit up by blazing hot, massive stars are shown in a reddish hue. Both bright and dark filamentary clouds can be seen, many of which harbor stellar nurseries. The plane of the Milky Way's flat disk is apparent as the main, horizontal band of clouds. The brightest white spot in the middle is the very center of the galaxy, which also marks the site of a supermassive black hole.

The region pictured here is immense, with a horizontal span of 890 light-years and a vertical span of 640 light-years. Earth is located 26,000 light-years away, out in one of the Milky Way's spiral arms. Though most of the objects seen in this image are located at the galactic center, the features above and below the galactic plane tend to lie closer to Earth.

Scientists are intrigued by the giant lobes of dust extending away from the plane of the galaxy. They believe the lobes may have been formed by winds from massive stars.

This image is a mosaic of thousands of short exposures taken by Spitzer's Infrared Array Camera (IRAC), showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange), and 8.0 microns (red). The entire region was imaged in less than 16 hours.

About the Object	Object Name: Galactic Center Position (J2000): Galactic latitude: 0.0 Galactic longitude: 0.0 Distance: 26,000 light-years Constellation: Sagittarius
About the Data	Image Credit: NASA/JPL-Caltech/S. Stolovy (Spitzer Science Center/ Caltech) Instrument: IRAC Wavelength: 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange), 8.0 microns (red) Exposure Date: Sept 3, 2004 and Sept 15, 2005 Exposure Time: 10 seconds per position Field of View: 1.9 x 1.4 degrees Orientation: galactic north is up, galactic east is to the left Release Date: January 10, 2006
Observers	Susan Stolovy (Spitzer Science Center/Caltech) Solange Ramirez (IPAC) Rick G. Arendt (SSAI/GSFC) Dan Gezari (GSFC) Casey Law (Northwestern University) Angela Cotera (SETI) Jennifer Karr (Academia Sinica) Farhad Yusef-Zadeh (Northwestern University) Harvey Moseley (GSFC) Kris Sellgren (OSU) Howard A. Smith (CfA) Randall Smith (JHU)

Individual Image

Unpackaged, full-resolution image. Screen-Resolution (450x325): JPEG High-Resolution (7002x5050): JPEG | Mac TIFF | PC TIFF Credit: NASA/JPL-Caltech/S. Stolovy (SSC/Caltech)

The Spitzer Space Telescope is a NASA mission managed by the Jet Propulsion Laboratory. This website is maintained by the Spitzer Science Center, located on the campus of the California Institute of Technology and part of NASA's Infrared Processing and Analysis Center.