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Two moons of Uranus: Titania and Oberon. Both moons were discovered by William Herschel in 1787.
Credit: NASA/JPL
TODAY IN HISTORY: Planet Neptune is observed by the Voyager 2 space probe on August 24, 1989. (via)
98% waning gibbous Moon | 11% waning crescent Moon
by Bartosz Wojczyński
Timelapse of Europa & Io orbiting Jupiter, shot from Cassini during its flyby of Jupiter