Space Photos of the Week: The Curiosity Rover Snaps a Selfie on Mars

This colorful nebula has been likened to a penguin guarding an egg. See it? Well, NASA does, anyway—so just go with it. The penguin-shaped galaxy, dubbed NGC 2336, was likely once a spiral galaxy that’s since become flattened and warped. The egg’s technical name is NGC 2937, and its teal glow indicates that it contains a collection of older stars. Eventually these two galaxies will become one and...

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