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Despina's diameter is approximately 150 kilometres (93 mi). [4] Despina is irregularly shaped and shows no sign of any geological modification. It is likely that it is a rubble pile re-accreted from fragments of Neptune's original satellites, which were disrupted by perturbations from Triton soon after that moon's capture into a very eccentric initial orbit.
Naiad, the closest regular moon, is also the second smallest among the inner moons (following the discovery of Hippocamp), whereas Proteus is the largest regular moon and the second largest moon of Neptune. The first five moons orbit much faster than Neptune's rotation itself ranging from 7 hours for Naiad and Thalassa, to 13 hours for Larissa.
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The object that struck the moon is estimated to have been about 15 miles (25 km) in diameter, larger than the asteroid that struck Earth 66 million years ago and doomed the dinosaurs.
Lunar Reconnaissance Orbiter Wide Angle Camera image of Reiner Gamma Another view of Reiner Gamma swirls Mare Ingenii Swirls east of Firsov crater, from Apollo 10. Lunar swirls are enigmatic features found across the Moon's surface, which are characterized by having a high albedo, appearing optically immature (i.e. having the optical characteristics of a relatively young regolith), and (often ...
Notable features: Brightness variable from 0%-100% | Sunset simulation | 13 preloaded alarm sounds | Numerous relaxation sounds | Night-light setting The Hatch Restore 2 is a full-featured sunrise ...
Since the Chinese calendar is based on the lunisolar calendar, the Lunar New Year is typically celebrated on the second new moon after the winter solstice. In 2025, the Year of the Wood Snake ...
Despina (moon), a moon of Neptune; Despina, a character in Mozart's opera Così fan tutte "Despoina", a song by Nikos Karvelas This page was last edited on 10 ...