Thursday, April 21, 2011

APOD 4.4

Peculiar Galaxies of Arp 273
The spiky stars in the foreground are well within our own Milky Way Galaxy. The two eye-catching galaxies lie far beyond the Milky Way at a distance of over 300 million light years. Their distorted appearance is due to gravitational tides as the pair engage in close encounters. From our perspective, the bright cores of the Arp may offer an analog of their far future encounter. The release of this vista celebratesthe 21st anniversary of the Hubble Space Telescope in orbit!

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