Image:Andromeda active core.jpg

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Description

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 centre 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.

Source

Hubble Telescope site

Date

September 20, 2005 01:00 PM (EDT)

Author

NASA, ESA and A. Schaller (for STScI)

Permission
( Reusing this image)
Public domain
This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". ( NASA copyright policy page or JPL Image Use Policy).

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current 05:26, 7 September 2007 4,800×3,600 (18.59 MB) Alnokta ({{Information |Description=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 t)
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