Quote Originally Posted by Sir Les
Can you explain galaxy ngc4622?
APOD (Astronomy Pictureof the Day) explains it here. And here. And a paper on it.

Two spiral galaxies collided. Gravitational interations between spirals and other galaxies produce the spirals.
MoonStarer420 Reviewed by MoonStarer420 on . The answer to life, the Universe, and everything! 37...did you expect 42? This is open cluster NGC 2169, eerie isn't it? Rating: 5