The second moon of Neptune in order from the planet. Thalassa was discovered in September 1989 by the Voyager Imaging team. It is named after a daughter of Aether and Hemera in Greek mythology and is also known as Neptune IV. Like the five other inner moons discovered during the 1989 flyby of Voyager 2, Thalassa is among the darkest objects in the Solar System.
Related entry Neptune, moons
Related category PLANETS AND MOONS
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