Oct 28, 2024 · Neptunian planets typically have hydrogen and helium-dominated atmospheres with cores of rock and heavier metals. Neptunian exoplanets are similar in size to Neptune or …

Apr 29, 2025 · Neptune is the eighth and most distant planet from the Sun. It’s the fourth largest, and the first planet discovered with math.

Apr 21, 2025 · And Neptune makes a complete orbit around the Sun (a year in Neptunian time) in about 165 Earth years (60,190 Earth days). Sometimes Neptune is even farther from the Sun …

Mar 11, 2025 · Neptunian planets are similar in size to Neptune or Uranus in our solar system. They likely have a mixture of interior compositions, but all will have hydrogen and helium …

Mar 12, 2025 · Neptune has 16 known moons. The first moon found – Triton – was spotted on Oct. 10, 1846, just 17 days after Neptune was discovered.

Mar 13, 2025 · While there are many icy bodies in this region that we broadly refer to as Kuiper Belt Objects (KBOs) or trans-Neptunian objects (TNOs), they're fairly diverse in size, shape, …

Feb 12, 2025 · Trans-Neptunian objects (TNOs) are icy bodies ranging in size from Pluto and Eris (dwarf planets with diameters of about 1,500 miles) down to tens of miles (Arrokoth) and even …

Sep 13, 2010 · This is an artist's concept of a craggy piece of solar system debris that belongs to a class of bodies called trans-Neptunian objects (TNOs). Most TNOs are small and faint, …

Mar 12, 2025 · The Kuiper Belt is a doughnut-shaped region of icy objects beyond the orbit of Neptune. It is home to Pluto and most of the known dwarf planets and some comets.

Oct 28, 2020 · These often-pristine leftovers from our solar system’s days of planet formation are called Kuiper Belt Objects, or Trans-Neptunian Objects. NASA’s upcoming James Webb …