Which is the smallest planet in the solar system?

The planets in the solar system are from largest to smallest: Jupiter.

Saturn. Uranus.

Neptune. Earth.

Venus. Mars.

Mercury. The average diameter is 142984 km, respectively.

119,300 km.

51118 km.

49,528 km.

Kilometer. Kilometer.

6794 km.

Kilometer. In addition, Pluto was once one of the nine planets and was the smallest in size. However, due to Pluto's short size, many scientists have questioned its planetary identity.

Its diameter (smaller than the Moon), its mass (only 0 24 times that of the Earth) is the smallest of the nine planets, the density is grams per cubic centimeter, and the albedo is 50%-60%. Or a large asteroid?

There are also scientists who believe that Pluto is an ice star. Ice stars are the "lost race" of the primitive solar system, formed at the beginning of the birth of the solar system, a crystal embryo composed of water and gas, and the kind of star that "grows" to a certain stage and then comes to an abrupt end. Scientists believe that Pluto is an "embryonic" sample of a standard planet, while other planets in the same solar system are of the "fully developed" type.

Just recently, some experts determined that Pluto is a type of star called an "ice dwarf", and there are hundreds of such ice dwarfs in the Kuiper Belt. Some astronomers believe that Pluto is only the largest celestial body in this orbital zone, so Pluto is not a planet, setting off a battle for Pluto's planetary identity.

The smallest of the 9 planets is Pluto, because there are now 8 planets in the solar system, and Pluto has been downgraded to a dwarf planet.

Therefore, Mercury is the smallest planet in the solar system. If you count the planets in the asteroid belt, you don't know which is the smallest.

The smallest planet in the solar system is Mercury.

Mercury is the smallest planet in our solar system and the closest planet to the Sun. It is very similar to our moon in terms of shape and surface characteristics.

Mercury.

Mercury (English: Mercury; Latin: Mercurius), a messenger god in ancient Roman mythology, was called mercury in ancient Europe.

In ancient China, it was called Chenxing, and Sima Qian, the author of the Western Han Dynasty's "Historical Records of Tianguanshu", found that Chenxing was gray from actual observation, which was associated with the Five Elements Doctrine, and named it Mercury with black water.

Mercury is the smallest of the eight planets in the solar system and the closest to the Sun. The orbital period is days, and it meets the Earth once in about 116 days, and its orbital speed is much faster than that of other planets in the solar system. Mercury is the planet with the largest temperature difference between day and night on the surface, and its atmosphere is extremely thin to effectively retain heat, with temperatures reaching up to 432°C at the equator during the day and dropping to -172°C at night.

Mercury's axis tilt is the smallest macroacne of any planet in the solar system (about 30 degrees), but has the greatest orbital eccentricity. The distance of Mercury at aphelion is about times that of perihelion. Mercury's surface is full of craters, similar to the Moon and other moons, and its geology has been inactive for billions of years.

Mercury has no seasons, and it is the only planet that resonates with the sun's orbit. The time for each three revolutions is almost equal to the time for two revolutions around the Sun. Looking at Mercury from the Sun, referring to its rotation and revolution, there is only one solar day for every two Mercurys.

1. Mercury. Located at 57,910,000 km from the Sun, it is the closest planet to the Sun and the smallest planet in the Solar System. Mercury is smaller than Jupiter and Saturn in diameter, but it has a greater mass.

2. Venus. Located at 108,200,000 km 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 has the closest orbit to a circle, with a deviation of less than 1%.

3. Earth. Located at a distance of 149,600,000 km from the Sun, it is the third planet in the Solar System from the inside to the outside and the fifth largest planet in the Solar System.

4. Mars. At 227,940,000 km from the Sun, it is the fourth farthest from the Sun and the seventh largest planet in the Solar System.

5. Jupiter. At 778,330,000 kilometers from the Sun, it is the fifth planet from the Sun and the largest, with a sum of times the mass of all other planets.

6. Saturn. At 1,429,400,000 kilometers from the Sun, it is the sixth farthest planet from the Sun and the second largest of the eight planets.

7. Uranus.

Located at 2,870,990,000 km from the Sun, it is the seventh farthest planet from the Sun in the Solar System and the third largest planet in the Solar System in terms of diameter.

8. Neptune.

Located at a distance of 4,504,000,000 km from the Sun, it is the eighth planet orbiting the Sun and the fourth largest object in the Solar System (in diameter).

9. Pluto.

With an average distance of 5,913,520,000 km from the Sun, Pluto is the farthest and smallest planet from the Sun.

Mercury is the smallest planet in the solar system, with an average radius of 2,440 kilometers, the size of an Earth. Mercury is the smallest of the eight planets in the solar system and the closest to the Sun. The orbital period is days, about 116 days to meet the Earth, and the orbital speed is far faster than that of the other planets in the solar system.

Mercury has no seasons, and it is the only planet that shares the orbit of the Sun. The time for each three revolutions is almost equal to the time for two revolutions around the Sun. Looking at Mercury from the Sun, with reference to its rotation and revolution, there is only one solar day every two Mercury years.

Mercury's orbit is on the inner side of the Earth, so it can only appear in the sky at dawn and dusk and during the day, not around midnight. In the Northern Hemisphere, Mercury can only be seen in the early hours of the morning or twilight at dusk.