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NeptuneUranus is a gas planet.
According to scientific explorations, Neptune is a gaseous planet, and in addition to it, there are eight planets.
, the four farthest planets from Earth are all gaseous planets, and they are also the four largest in mass. Jupiter.
Saturn, Uranus, and Neptune masses dominate the solar system.
99% except the Sun, of which Uranus, the least massive, is 14 times more massive than Earth, and Jupiter, the most massive, is 318 times the mass of Earth's ascending sphere.
Scientists have been searching and studying the solar system since a long time, and so far they have found many planets outside the solar system. Exoplanets are quite abundant, at least a few thousand have been discovered so far, and this is a relatively good thing for the study of these planets.
In the astronomical world, the formation of gas planets may be similar to terrestrial planets, with a rather slow adsorption process. Although it is said to be a gas planet, it does not mean that it is composed entirely of gas coincidence. This gaseous planet started out as a slow rotation process, eventually acquiring some rocky material.
Then the adsorption of the gas begins to form a gas layer. The result was the formation of a gas planet.
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Neptune is the far-reaching planet of the eight planets, and Neptune is the eighth planet in order of the distance from the planet from the Sun, the fourth largest planet in diameter and the third largest planet in mass. Its brightness is only equal to , and it can only be seen in an astronomical telescope.
Neptune is smaller than Uranus in diameter and volume, but has a mass of about 17 times that of Earth, while its sister planet, Uranus, is about 14 times more massive than Earth due to its lower density.
Neptune's atmosphere is dominated by hydrogen and helium, as well as trace amounts of methane, which is one of the reasons for the planet's blue color. Neptune has the most intense storm in the solar system, with measured winds of up to 2,100 km h. The temperature at the top of Neptune's cloud is -218 (55 K) because it is farthest from the Sun and is one of the coldest regions of the solar system.
The temperature of Neptune's core is about 8000
Neptune was discovered on September 23, 1846, and is the only planet to be discovered using mathematics** rather than planned observations. Astronomers have used perturbations in Uranus' orbit to speculate on Neptune's existence and possible location, and only the U.S. Voyager 2 probe has visited Neptune on August 25, 1989.
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The basic characteristics of Neptune are divided into:
1. Structural composition.
With its kilogram mass, Neptune is a medium-sized planet between the Earth and the giant planets (referring to Jupiter and Saturn): it has both 17 times the mass of the Earth and 1 18 times the mass of Jupiter.
By comparing the rotational speed and the flattening rate, it can be seen that Neptune's mass distribution is not as concentrated as that of Uranus.
2. Atmosphere.
At high altitudes, Neptune's atmosphere is 80% hydrogen, 19% helium, and trace amounts of methane are also present. The main absorption bands appear at the spectral locations of red and infrared at wavelengths above 600 nm.
3. Climate. One difference between Neptune and Uranus is the level of typical meteorological activity. In 1986, when the Voyager 2 spacecraft flew past Uranus, the planet was visually rather uneventful, and during the Voyager 2 flyby in 1989, Neptune exhibited the famous weather phenomenon.
Neptune's atmosphere has the highest wind speed in the solar system, presumably driven by heat currents within it, and its weather is characterized by extremely violent storm systems, with winds reaching supersonic speeds up to about 2100 km h.
4. Magnetosphere. It has a magnetosphere similar to that of Uranus, with its magnetic field tilting up to 47° relative to its axis of rotation and at least a radius from its core, or 13,500 km from its physical center.
4. Halo. Neptune also has rings. Only faint and vague arcs can be observed on Earth, not full auras.
But Voyager 2 images show that these arcs are made up entirely of halos of bright blocks. One of the auras appears to have a peculiar spiral structure.
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Neptune is one of the eight planets in the solar system and the farthest known planet from the Sun.
Neptune's orbital semi-major axis is astronomical units, its orbital period is years, its mass is Earth's mass (3rd, slightly larger than its nearest neighbor Uranus), and its radius is Earth's radius (4th).
Neptune's apparent magnitude is about equal at the highest level, and it requires the help of an astronomical telescope to observe. Neptune is blue to the naked eye, and Westerners named it after Neptune, the god of the sea in Roman mythology. When Li Shanlan and others translated "Talking Heaven" in 1859, their Chinese translation was Neptune.
Astral motion. The average distance between Neptune and the Sun is 4.5 billion kilometers, about one astronomical unit (AU). Neptune's orbital period (years) is approximately equivalent to Earth-years, and the orbital inclination is about.
Neptune returned to the point where it was discovered on July 12, 2011, when it orbited the Sun. Since the Earth is in a different part of its celestial cycle, Neptune as seen from the Earth will not be in the same position in the sky as it was discovered.
Observed from Earth, Neptune's opposition cycle is 367 days, and these cycles bring it close to the coordinates of April and July 2010 and October and November 2011 when it was discovered in 1846. On August 20, 2010, Neptune went to opposition again on the same day that it was discovered in 1846.
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The average distance from the Sun is ranked from near to far, with Neptune in eighth place. It is of equal brightness and can only be seen through telescopes. Since it is a pale blue planet, it is named Neptune according to traditional planetary nomenclature.
Neptune is the god of the sea who rules the sea in Roman mythology, in charge of the universe of 1 3, quite supernatural, and the astronomical symbol of Neptune symbolizes the cold and shining divine fork in Neptune's hand.
Uranus's twin brother.
Neptune's orbit around the Sun has a half-length diameter of 4.5 billion kilometers and takes 165 years to complete one revolution. From its discovery in 1846 to the present day, Neptune has not completed a full journey. Neptune is 49,400 kilometers in diameter, similar to Uranus, but slightly more massive than Uranus.
Neptune and Uranus are mainly composed of hydrogen and helium, and their internal structures are very similar, so Neptune and Uranus are twin brothers.
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Neptune is the farthest from the Sun and is currently the smallest and smallest planet with the lowest known atmospheric temperature.
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Neptune is the calculated planet.
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According to scientists.
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