Most of these clusters, created in the collision of the two galaxies, will disperse within 10 million years but about 100 of the largest will grow into "globular clusters" -- large groups of stars found in many galaxies, including our own Milky Way.

The Antennae galaxies, 68 million light years from Earth, began to fuse 500 million years ago.

A light year is the distance light waves travel in one year -- about 6 trillion miles.

The image serves as a preview for the Milky Way's likely collision with the nearby Andromeda Galaxy, about 6 billion years from now.

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