Solar System Ambassadors - NASA Solar System Exploration
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.
In Depth | Proteus – NASA Solar System Exploration
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. Proteus was most likely overlooked because it is so dark and the distance between Earth and Neptune is so great. Overview Proteus is one of the largest of Neptune's known moons, although it is not …
In Depth - NASA Solar System Exploration
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 only planet in our solar system not visible to the naked eye. In 2011 Neptune completed its first 165-year orbit since its discovery in 1846. Neptune is so far from the Sun that high noon on the big …
10 Need-to-Know Things About Neptune - NASA Solar System …
Neptune takes about 16 hours to rotate once (a Neptunian day), and about 165 Earth years to orbit the sun (a Neptunian year).
Planet Compare – NASA Solar System Exploration
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.
Neptune By the Numbers – NASA Solar System Exploration
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.
In Depth | Triton – NASA Solar System Exploration
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 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit. Scientists think Triton is a Kuiper Belt …
The Exploration of Neptune and Triton - NASA Solar System …
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 formation and the evolution of ice giant planets, icy satellites, …
Earth By the Numbers – NASA Solar System Exploration
Jan 9, 2025 · Your home. Our Mission.And the one planet that NASA studies more than any other.
Recipe for Neptune Revealed by Scientists - NASA Solar System …
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 billion years?