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Artist's concept of nearby binary brown dwarfs WISE J104915.57-531906
Where an Astronomer Actually Observes
Galaxy NGC 5584 from Hubble WFC3
Rosetta views a crescent Moon (detail)
Rosetta views a crescent Moon
Hypothetical Earth-size planet orbiting a young red dwarf
Comet ISON from Deep Impact
VLT Survey Telescope (VST) image of the Hercules galaxy cluster
The entire sky, projected with the Milky Way at center
Chamaeleon I region of bright nebulae and hot stars
The Lupus 3 dark cloud and associated hot young stars
Earth-sized planets of Kepler-20
Comet Lovejoy by Robert McNaught
Pillars of Creation
Extent of human radio broadcasts
Three planets around HR 8799
The microlensing light curve of planet OGLE–2005-BLG-390Lb
A Planetary Transit
The 1.3 meter "Warsaw" telescope at Las Campanas, Chile, used by OGLE
A Distant World
First Image of an Exoplanet?
Fomalhaut b, a directly imaged exoplanet
Jupiter and Io from Pleiades-1B (animation)
A small slice of Andromeda
M51, the Whirlpool Galaxy, from Hubble

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