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How big is the biggest planet?

There are eight planets in the solar system, of which Jupiter is the largest mass, about 1300 times the size of the Earth, and 318 times the mass of the Earth, but Jupiter is not the largest planet in the universe. Scientists have observed that many planets are better than Jupiter. Bigger.

Jupiter is a gaseous giant planet. When a planet reaches a certain mass, it will become such a celestial body. However, since the planets will not emit light, it is quite difficult to observe the planets outside the solar system. Most of them can only pass the “occlusion method”. The process of stellar surfaces obscuring the light of stars) “discover them.” But even so, scientists have discovered planets that are larger in mass and volume than Jupiter.

For example, TRES4, which is 1.7 times the diameter of Jupiter, is 4 to 5 times the size of Jupiter, but only 85% of Jupiter, and WASP-79b, which is about 2.1 times the diameter of Jupiter. Jupiter is eight times larger, but its mass is only 90% of Jupiter, so it is also a planet that is larger than Jupiter and smaller in quality than Jupiter.

Another example is J1407b, which is a gaseous object with a huge aura. The diameter of the star is about 2.5 times the diameter of Jupiter, but its mass is about 20 times that of Jupiter. This is not a planet since the classification of the star. But belong to the brown dwarf.

This is because there is an upper limit to the mass of the planet. The upper limit is about 13 times the mass of Jupiter. If the upper limit is exceeded, the inside of the planet will start to undergo nuclear fusion due to high temperature and high pressure. Such a planet cannot be called a planet. It became a brown dwarf. Therefore, the upper limit of the planet’s mass is 13 times that of Jupiter, and the mass of Jupiter is 318 times that of the Earth. The upper limit of the mass of the largest planet is equivalent to about 4,134 Earth.

There is a wood-like planet numbered SIMP J01365663+0933473. It is determined that its mass is 12.7 times that of Jupiter, which is equivalent to 4038 times that of the Earth. It is likely that its interior does not start to nuclear fusion, so it is the most known mass. planet. This is a stray planet, not attached to any main star, its own magnetic field is 4 million times that of the Earth, about 20 light years away from us, and its direction of advance is very close to our solar system.

Although the mass of the planet has a rough upper limit, the upper line of the volume is not well defined. The largest planet that scientists have observed so far is the HD 100546b, which is 320 light-years from Earth. This giant planet is a stray planet. Its mass is seven times larger than Jupiter, but its volume is unusually large. About 910,000 kilometers, reaching 65% of the diameter of the sun, the volume is about 1/4 of the sun, or the equivalent of 250 Jupiter. According to our Earth, it can hold 325,000, if it is a Mercury, the smaller head, can hold 650,000. In fact, the size of this planet even exceeds the volume of many small-mass stars, the red dwarf.

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