Black holes sound very ominous, and they are – even though no human will ever see one. A black hole is a place in space where gravity pulls so much that even light can’t escape from it. The gravity, according to the US National Aeronautics and Space Administration (NASA), is so strong because matter has been squeezed into a tiny space; this can happen when a star is dying.

Astronomers at Tel Aviv University’s Wise Observatory outside Mitzpe Ramon in the Negev have discovered evidence of a galaxy’s being gobbled up by its neighbors. They identified a heavenly body in the shape of a tadpole with an enormous tail about 500,000 light-years long and some 300 million light-years away from Earth. They said the “tadpole,” which had not been discovered until now because it shines in a very pale light, is composed of the remains of a dwarf galaxy created by swallowing two large nearby galaxies.