We have written many articles about Neptune for Universe Today. NASA Science Solar System Exploration: Our Solar System, National Geographic Education: Planetary Size and Distance Comparison, Space.com: A New World: NASA Recalls Voyager 2 Probe's 1989 Neptune Encounter, Universe Today: 10 Interesting Facts About Neptune. At differe… Th… Join us at patreon.com/universetoday. Astronomers using Hubble watched a mysterious dark vortex on Neptune abruptly steer away from a likely death on the giant blue planet. Relatively speaking, then, given that Neptune, as mentioned, is 30 AU from the sun, the terrestrial planets are grouped in a tight cluster. Source: universetoday.com. The gas giants reveal a continuation of this ever-widening orbit gap. Answers: 1 Show answers . Neptune = 76 steps from sun; Kuiper belt = 100 steps from sun; Emphasize that at this scale, the sun would be less than 1.3 centimeters (0.5 inches) in diameter. The Earth's average distance of 93 million miles is called one astronomical unit, or AU. In the other fields, a value can be entered to calculate the ratios of the distances. Neptune’s distance from the Sun is 4.5 billion km; more specifically, it’s 4,503,443,661 km. A 19th-century French mathematician named Urbain Joseph Le Verrier suspected that a planet had to exist outside the orbit of Uranus owing to perturbation's in the orbit of Uranus that could only have come from an object large enough to exert small gravitational effects on Uranus. 0 0. It orbits at an average distance of 2.8 billion miles (4.5 billion km), thirty times farther than Earth. This problem says Neptune is an average distance from the sun. It is famed for its blue color. Like all planets, Neptune orbits the sun in a stretched-out circle known as an ellipse. From an average distance of 2.8 billion miles (4.5 billion kilometers), Neptune is 30 astronomical units away from the Sun. If you’re still using the Imperial system, that’s the same as 2.8 billion miles. Following the discovery of Pluto, the title was stripped from Neptune. mean distance from Sun: 4,498,396,000 km (30.1 AU) eccentricity of orbit: 0.0086: inclination of orbit to ecliptic: 1.77° When Neptune is at its closest point to the Sun, called perihelion, it’s 4.45 billion km from the Sun. 1 astronomical unit, or AU, is the average distance from the Earth to the Sun; that’s about 150 million km. But Pluto's orbit is so elliptical (one of the reasons for its eventual "demotion") that between 1979 and 1999, its orbit actually brought it inside Neptune's, making Neptune the most distant planet regardless of arguments about what does and doesn't merit the title of "planet.". Then in 1989 the planetary probe Voyager 2 flew past Neptune. Source: universetoday.com. (Uranus, for all practical purposes, usually can't be seen from Earth without binoculars or a telescope either. Neptune has a mass that is about 17 times the mass of earth. Each of the giant gas planets is surrounded by at least one ring composed of rocks and ice particles, with Saturn famed for the especially prominent rings that set it apart from all of its solar-system neighbors. Note that the jump in distance from Mars to the Asteroid Belt, 1.3 AU, is thus almost as great as the distance from the sun to Mars. It has a diameter of 30,200 miles and is the fourth largest planet in the solar system. The distance of the Neptune planet from the sun is quite far compared to other planets. The au is not the exact distance, but the average distance between the Earth and the Sun, meaning the distance may sometimes vary. With a radius of 15,299.4 miles (24,622 kilometers), Neptune is about four times wider than Earth. So definitely the radiation of the sun will not reach much, compared to the planets that are near to the sun. Dark Storm on Neptune Reverses Direction A planet in an unlikely orbit around a double star 336 light-years away may offer a clue to a mystery closer to home: the hypothesized "Planet Nine." It was only 17 days later that Neptune's largest moon, Triton, was found. Neptune Is Furthest From Sun. A telescope or strong binoculars will show Neptune as a small blue dot, similar in appearance to Uranus. Actually, the last planet was Pluto but it was excluded from the list of planets in 2006 and placed in a new class known as “Dwarf Planet”. The solar system consists of the sun, which is a star and by far the largest object in the mix; eight "regular" planets, which in order from innermost to outermost are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune; five "dwarf" planets; in the neighborhood of 200 moons, which orbit both planets and dwarf planets; about 780,000 asteroids, which orbit the sun between Mars and Jupiter; about 3,500 comets; and a variety of meteoroids, unknown in number. It is famed for its blue color. Because light travels at 186,000 miles per second and Neptune is 2.8 billion miles from the sun, it takes the sun's rays over 15,000 seconds to reach Neptune, or more than four hours. How far is Neptune from the Sun? Kevin Beck holds a bachelor's degree in physics with minors in math and chemistry from the University of Vermont. Sciencing_Icons_Science Neptune is the most distant planet from the Sun. 6. Post was not sent - check your email addresses! 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