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Collisions play an important role in galaxy evolution. These two galaxies—the Whirlpool and its companion—are relatively nearby at a distance of just 23 million light-years from Earth. IRAC sees the main galaxy as very red due to warm dust: a sign of active star formation that probably was triggered by the collision.

Gastrotheca plumbea, Silver Marsupial frog (male) in habitat on Bomaria pardina, Imbabura Province, Ecuador

Orion Nebula in Oxygen, Hydrogen, and Sulfur : César Blanco González

A rose made of galaxies

This image from Nasa's Spitzer Space Telescope shows a stellar nursery containing thousand of young stars & developing protostars near the sword of the constellation Orion.