Northern and Southern Owls
http://apod.nasa.gov/apod/ap100506.html
This is a comparison between two planetary nebulae, M97, called the Owl Nebula, and PLN283+25.1, also called the Southern Owl Nebula. M97 is in Ursa Major and PLN 283+25.1 is in Hydra. These nebulae are approximately the same size (two light-years in diameter), and have a similar round shape. The Owl Nebula was discovered in 1781 and received its name because it appears to have owl-like eyes that are visible when viewed through a telescope. Planetary nebulae form when a Sun-sized star exhausts its nuclear fuel, expands, and eventually releases gas and plasma in an expanding shell.
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