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News Release Archive:

News Release 413 of 967

September 20, 2005 01:00 PM (EDT)

News Release Number: STScI-2005-26

Hubble Finds Mysterious Disk of Blue Stars Around Black Hole

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Image: Andromeda's Active Core

Andromeda's Active CoreSTScI-PRC2005-26b Artist's Concept

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ABOUT THIS IMAGE:

This artist's concept shows a view across a mysterious disk of young, blue stars encircling a supermassive black hole at the core of the neighboring Andromeda Galaxy (M31). The region around the black hole is barely visible at the center of the disk. The background stars are the typical older, redder population of stars that inhabit the cores of most galaxies. Spectroscopic observations by the Hubble Space Telescope reveal that the blue light consists of more than 400 stars that formed in a burst of activity about 200 million years ago. The stars are tightly packed in a disk that is only a light-year across. Under the black hole's gravitational grip, the stars are traveling very fast: 2.2 million miles an hour (3.6 million kilometers an hour, or 1,000 kilometers a second).

Object Names: M31, Andromeda Galaxy, NGC 224

Image Type: Artwork

Credit: NASA, ESA and A. Schaller (for STScI)

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