Not a galaxy.
"This neurosphere was cultured from an adult mouse brain in a project aiming to determine how new brain cells are born in the adult brain. With nascent neurons (yellow) navigating amongst associated astrocytes (red), it reminds me of a meteorite in the night sky and highlights the mirror relationship between microcosm and macrocosm."One of the top science and nature photos posted in 2010 in Australian Geographic (credit Dana Bradford).
