Jan 9, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

Discovery Proteus was discovered in 1989 by the Voyager 2 spacecraft. This is unusual since a smaller moon, Nereid, was discovered 33 years earlier using an Earth-based telescope. …

Dark, cold, and whipped by supersonic winds, ice giant Neptune is the eighth and most distant planet in our solar system. More than 30 times as far from the Sun as Earth, Neptune is the …

Neptune takes about 16 hours to rotate once (a Neptunian day), and about 165 Earth years to orbit the sun (a Neptunian year).

Jan 9, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

Jan 9, 2025 · Neptune is the eighth and most distant planet from the Sun. It’s the fourth largest, and the first planet discovered with math.

Discovery Triton was discovered on Oct. 10, 1846 by British astronomer William Lassell, just 17 days after Neptune itself was discovered. Overview Triton is the largest of Neptune's 13 …

Jan 9, 2025 · Neptune and its captured moon Triton are unexplored with modern spacecraft instrumentation. Observations of these objects are urgently needed to address planet …

Jan 9, 2025 · Your home. Our Mission.And the one planet that NASA studies more than any other.

Oct 26, 2000 · What do you get if you mix together one part helium and five-and-a-half parts hydrogen, add a dash of methane, heat to 60 Kelvins (-351 degrees F) and let sit for over four …