Neptune Facts: Distance, Size, Temperature & Moons

Planet #8 of 9 · ❄️ Ice-dominant (frozen volatiles)

The windiest planet known, with supersonic storms screaming across a deep blue, frigid atmosphere at the edge of the solar system.

How far is Neptune from Earth?

Neptune is 4.31 – 4.69 billion km from Earth. This is a range rather than a fixed number because both Earth and Neptune are constantly moving along their own orbits around the Sun, so the distance between them is always changing. Neptune orbits at an average distance of 30.07 AU (4.5 billion km) from the Sun, compared to Earth's 1 AU (149.6 million km).

Key facts about Neptune

Atmosphere

80% H2, 19% He, 1% methane

Discovery

Discovered 1846 — predicted mathematically by Urbain Le Verrier, then observed by Johann Galle.

Did you know?

✨ Neptune has the strongest winds in the solar system, reaching up to 2,100 km/h.