Image: Two images of Colliding Galaxies (Very Large Array and Hubble Space Telescope)

Left caption: Very Large Array image showing distribution of gas and stars in the colliding pair of galaxies NGC 4038-39 (the Antennae) showing prominent tidal tails characteristic of two colliding disk galaxies.

Source: National Radio Astronomy Observatory; VLA image gallery (thesis work of Josh Hibbard).
Credit: Image courtesy of NRAO/AUI and J. Hibbard
Website: http://www.nrao.edu/imagegallery/php/level3.php?id=265
NSF-funded: YES

Right caption: Inset shows high-resolution optical view of merging centers of the two galaxies, called the Antennae, taken with Hubble Space Telescope and illustrating the intense burst of star-formation that has been triggered by the collision.

Source: HST/NASA
Website: Right: http://hubblesite.org/gallery/showcase/galaxies/g8.shtml
Permission: Public domain

NSF use permitted: YES
NSF funded: NO

Source: Sandra Faber
Speaker at NSF Funded The Universe From the Ground Up Astronomy Symposium

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