Planet Neptune

Some Facts about The Neptunian Moon, Thalassa
courtesy of NASA

Discovered ByR. Terrile, Voyager 2
Date of Discovery1989
Average Distance from Neptune50,070 km (metric)
Equatorial Radius40 km (metric)
Mass800,000,000,000,000,000 kg (metric)
Orbit Period (Length of Year)0.311485 Earth days
Orbital Eccentricity0
Orbital Inclination to Ecliptic0.21°
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