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This is a deep image of the Sword of Orion - the three stars that make up the weapon hanging off the belt of this famous celestial hunter. The image showcases the amazing mix of physical and optical processes including atomic emission, Rayleigh scattering, reflection and absorbtion of light, that go on in this star forming region to create this kaleidescope of colours and details.

Enceladus (494 km), a moon of Saturn that churns with internal heat, ejecting plumes of microscopic ice particles into Saturn's orbit (photo from NASA's Cassini spacecraft)

NASA Spitzer Space Telescopefrom NASA Spitzer Space Telescope

Orion's Dreamy Stars

Orion Nebula