Constellation knowledge why Jupiter is called a small solar system

There are eight planets in the solar system, but only Jupiter is called the small solar system. There are so many galaxies in the universe. Why is only Jupiter called the small solar system? What is the reason? Then let the constellation knowledge reveal the secret for everyone! Let's have a look!

Why is Jupiter called a small solar system?

Jupiter not only has many special features, but also has the most satellites in the solar system. These satellites revolve around Jupiter at different speeds, which really looks a bit like the solar system. Because of its huge mass and volume, Jupiter has a strong gravity, attracting many meteors and comets. Together with many satellites, these meteors and comets form an unusual family centered on Jupiter in the solar system. Jupiter itself emits heat, so it is called "small solar system". Of course, Jupiter is more accessible than the sun. These conditions make Jupiter the best object to understand the initial state of the solar system and study the origin and evolution of the solar system.

introduce

Jupiter is the largest and fastest rotating planet among the eight planets in the solar system, and the fifth planet from the inside out. Its mass is one thousandth of that of the sun and 2.5 times that of the other seven planets in the solar system combined. Jupiter, Saturn, Uranus and Neptune are all gaseous planets, so they are also collectively called woody planets (Jupiter and Saturn are collectively called gaseous giants). Jupiter is a giant gas planet, mainly composed of hydrogen, followed by helium, accounting for 25% of the total mass and 70% of all planets in the solar system. The core contains other heavy elements. What humans usually see is the cloud top in the atmosphere, and the air pressure is slightly higher than 1 atmospheric pressure.

Jupiter is a flat sphere (with a slight but obvious bulge near the equator) because it rotates very fast. The outer atmosphere is obviously divided into several regions according to latitude, and turbulence and storms are easy to appear at the edge of regional connection. The most prominent example is the Great Red Spot, which was first discovered by telescope in the17th century. Surrounding this planet is a loose planetary ring system and a powerful magnetosphere. Jupiter has at least 79 moons.

Jupiter is the only planet with the sun's center of mass outside the sun's body, but it is only outside the 7% radius of the sun. The average distance between Jupiter and the sun is 778 million kilometers (about 5.2 times the distance between the earth and the sun, that is, 5.2 astronomical units), and it takes 1 1.8 earth years to go around the sun. This is two-fifths of Saturn's period of revolution, which means that the two largest planets in the solar system form a 5: 2 orbital period. Jupiter's elliptical orbit is tilted relative to the Earth's orbit 1.3 1. Because of the eccentricity of 0.048, the distance between perihelion and apohelion is 75 million kilometers. Compared with the Earth and Mars, Jupiter's orbital inclination is very small, only 3. 13, so there is no obvious seasonal variation.

Jupiter's rotation is the fastest of all planets in the solar system, and the time to complete one rotation around its axis is less than 10 hour; The resulting equatorial uplift can be easily seen with amateur telescopes on the earth. This planet is a oblate sphere, which means that its equatorial diameter is longer than the diameter between the poles. Jupiter's equatorial diameter is 9,275 kilometers (5,763 miles) longer than the diameter passing through the poles.

Because Jupiter is not a solid, its upper atmosphere rotates badly. Jupiter's polar atmospheric rotation period is about 5 minutes longer than that of the equator, and there are three systems as reference frames, which are used to describe the characteristics of atmospheric motion. System I is suitable for the latitude range from north latitude 10 N to 10 S, and the shortest is 9h50m30.0s System II is suitable for all latitudes from south to north, and its period is 9h55m40.6s System III was first defined by radio astronomy, corresponding to the rotation of planetary magnetosphere, and its period is the official period of Jupiter.