What is the largest planet in the universe?

The order of the planets in the universe is the sun, Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars and Mercury.

The solar system is a celestial system consisting of the sun, planets and their satellites, asteroids, comets, meteoroids and interplanetary matter. The sun is the central celestial body in the solar system, accounting for 99.86% of the total mass, and other celestial bodies revolve around it under the action of the bow force of the sun. In the solar system, only the sun is a star that emits light by thermonuclear reaction, and other celestial bodies emit light by reflecting sunlight.

The nine planets in the solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. American astronomers are studying the Kuiper Belt celestial body "Nana", which was declared as "the tenth largest planet in the solar system" in 2005. This discovery may further aggravate the debate on planets of the solar system standard. The physical and chemical properties of this new star need to be further confirmed by scientists. ?

According to the standards of mass, chemical composition and distance from the sun, it can be roughly divided into three categories: Earth-like planets (Mercury, Venus, Earth and Mars) have smaller volume and mass, the largest average density and fewer satellites. Giant planets (Jupiter and Saturn) have the largest volume and mass, the smallest average density, and many satellites and planetary rings, which can emit infrared radiation by themselves.

The "nine planets" are constantly orbiting the sun in their respective orbits. Their orbits are different in size, speed and period, and they are usually scattered in different regions of the solar system. After a certain period of time, the nine planets will run to one side of the sun at the same time and gather in a fan-shaped area with a small angle. People call this phenomenon "Julian".