Elsewhere in the image, Hubble’s optical data appears in blue, white, orange and brown, while infrared data from Spitzer appears red. Shown is a previous image Hubble took of the colliding galaxies, with their positions mirrored.
- Daily Mail: The universe's 'evil eye': Bizarre shape is spotted as two galaxies crash together at 225,000mph
This type of galactic structure sometimes results after collisions between galaxies. Even though there are many billions of stars in each galaxy, they usually don't hit each other in a collision between galaxies because there is so much space between each star. Tremendous forces in gravity will come into play and this type of structure is one of the possible results.
Here's another collision and they made a composite image to create the different colors which come from different wavelengths.
Galaxies IC 2163 (left) and NGC 2207 (right) recently grazed past each other, triggering a tsunami of stars and gas in IC 2163 and producing the dazzling eyelid-like features there. ALMA image of carbon monoxide (orange), which revealed motion of the gas in these features, is shown on top of Hubble image (blue) of the galaxy.
- Daily Mail
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