Colliding Antennae galaxies make for a remarkable image in a composite photograph combining images from the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory.
The galaxies are colliding in a mash-up spanning 100 million years according to current estimates.
From the article Colliding Galaxies Swirl in Dazzling New Photo at Space.com:
“The Chandra image was taken in Dec. 1999, the Spitzer image was taken in Dec. 2003, and the Hubble image was taken in July 2004 and Feb. 2005. Data from the three observatories were combined to make the new composite image, which was released Thursday.”