Which of the nine planets is the smallest planet?

It is 57,965,438+00,000 kilometers away from the sun and is the smallest planet in the solar system. Mercury is smaller in diameter than Jupiter and Saturn, but its mass is greater.

2. Venus

With a distance of 0/08,200,000 kilometers from the sun, it is the second closest planet to the sun and the sixth largest planet in the solar system. Of all the planets, Venus' orbit is the closest to a circle with a deviation of less than 1%.

3. Earth

With a distance of 0/49,600,000 kilometers from the sun/kloc-,it is the third planet and the fifth largest planet in the solar system from the inside out.

4. Mars

It is 227,940,000 kilometers away from the sun, the fourth farthest from the sun and the seventh largest planet in the solar system.

5. Jupiter

With a distance of 778,330,000 kilometers from the sun, it is the fifth farthest planet from the sun and the largest one, which is 2.5 times larger than the total mass of all other planets.

6.saturn

With a distance of 0/,429,400,000 kilometers from the sun, it is the sixth farthest planet from the sun and the second largest among the eight planets.

7. Uranus

With a distance of 2,870,990,000 kilometers from the sun, it is the seventh farthest planet in the solar system and the third largest planet in diameter.

8. Neptune

4.504 billion kilometers away from the sun, it is the eighth planet orbiting the sun and the fourth largest celestial body (diameter) in the solar system.

9. Pluto

Pluto is the farthest and smallest planet with an average distance of 5,965,438+03,520,000 kilometers from the sun.

Extended data:

The definition of a planet

The International Astronomical Congress in 2006 gave a clear definition to the planet.

First, it must be a celestial body orbiting a star.

Second, the mass is large enough to make the celestial body become spherical by its own gravity.

Third, there should be no other celestial bodies near its orbit, or it can "clean up" the celestial bodies in orbit by itself within 3 billion years.

Pluto does not meet the third rule. Pluto's orbit intersects Neptune, and Pluto's moons are too huge.

According to this definition, Pluto is classified as a dwarf planet.

Source: Baidu Encyclopedia-Nine Planets