April 8
Galaxy NGC 4650A
Observed in 1999
About 130 million light-years away, NGC 4650A is one of only 100 known polar-ring galaxies, which feature a ring of stars encircling a disk. Polar rings might form when two galaxies collide, with one galaxy becoming the inner disk and the other forming the ring.
Image credit: NASA, ESA, Hubble Space Telescope