Neptune is the eighth and farthest known planet from the Sun. It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth. Compared to its fellow ice giant Uranus, Neptune is slightly more massive, but denser and smaller.

2024年11月6日 · Neptune is the eighth and most distant planet in our solar system. It was discovered in 1846. Neptune has 16 known moons.

2025年1月22日 · Neptune is the eighth, and most distant planet from the Sun. It’s the fourth-largest, and the first planet discovered with math. More than 30 times as far from the Sun as is …

2021年9月22日 · On the night of Sept. 23-24, 1846, astronomers discovered Neptune, the eighth planet orbiting around the Sun. The discovery was made based on mathematical calculations of its predicted position due to observed perturbations in the orbit of the planet Uranus.

2025年1月27日 · Neptune, third most massive planet in the solar system and the eighth and outermost planet from the Sun. Neptune has 14 moons, only two of which were discovered before Voyager 2’s visit in 1989, and a system of rings, which were unconfirmed before Voyager.

2025年1月14日 · Neptune is the eighth and most distant planet from the Sun. That means Uranus is Neptune’s only neighboring planet. Neptune was discovered in 1846 by Urbain Le Verrier, John Couch Adams, and Johann Galle. Only Voyager 2 has visited Neptune. What does Neptune look like? Voyager 2 took this picture of Neptune in 1989. Clouds streak across Neptune.

2024年1月15日 · Neptune is located about 2.8 billion miles (4.5 billion kilometres) from the Sun, making it a distant neighbour. It takes about 164.8 Earth years to complete one orbit around the Sun. Neptune is named after the Roman god of the Sea because of its bluish appearance.

Neptune's largest moon Triton was discovered on October 10, 1846, by William Lassell, just 17 days after Johann Gottfried Galle discovered the planet. Since Neptune was named for the Roman god of the sea, its moons are named for various lesser sea …

2019年9月25日 · Neptune is the fourth largest and the farthest planet of the Solar System with the most powerful wind speeds out of all the planets. It is the smallest of the gas giants and is the first planet to be discovered by mathematical predictions in 1846. Key Facts & Summary.

There is evidence that Neptune was seen and recorded by Galileo Galilei in 1613, Jérôme Lalande in 1795, and John Herschel in 1830, but none are known to have recognized it as a planet at the time. [6] These pre-discovery observations were important in accurately determining the orbit of Neptune.