Which planet is the smallest planet in the universe?

Compared to the giant planet found outside, this planet is made up of rock and ice, not gas. It is five times the size of the Earth and may have a similar atmosphere.

The planet orbits around a red dwarf star similar to the Sun, but this red dwarf is smaller and cooler.

According to **, the surface temperature of the planet is minus 220 degrees Celsius, which means that its surface may be a layer of ice.

This planet is located in the Milky Way like Earth, but it is closer to the Milky Way.

Published in the authoritative journal Nature, it is reported that the planet was discovered by microlensing. The microlensing technique for the discovery of the planet was first proposed by Albert Einstein in his theory in 1912.

It's hard to say without scope.

Because Pluto has been kicked out of the nine planets, the smallest of the remaining eight planets in the solar system is Mercury.

What kind of question is this, whether it is a star or all celestial bodies, including planetary comets, then as long as there is a pebble flying in the universe, it is also a planet.

It is not easy to say purely from the perspective of stars, the evolution of stars is almost the same, the mass is determined at the time of formation, so the lifetime is also determined, and finally evolves into white dwarfs, or neutron stars, so that the size is very different, but the mass is about the same.

It's Mercury. Mercury is the smallest of the eight planets, 1 3 larger than the Moon, and it is also the closest planet to the Sun. Mercury visual magnitude ranges from to.

Mercury is so close to the Sun that it is often overwhelmed by the intense sunlight, so telescopes are rarely able to take a closer look at it. Mercury does not have natural satellites, and the only moon that has ever come close to Mercury is the American probe Mariner 10, which photographed only about 45% of the surface when it explored Mercury in 1974 and 1975. Mercury is the fastest moving planet in the solar system.

Introduction: By far the largest planet in the solar system is Jupiter, which surpasses all other planets in mass and volume. Jupiter is 318 times the mass of the Earth, and its diameter is 140,000 kilometers, which is 11 times the diameter of the Earth.

Jupiter's Great Red Spot, even in its current shrinking size, spans 15,900 kilometers, is just over the radius of an entire Earth, and Jupiter's mass is twice the mass of the other remaining planets in the solar system combined. Despite Jupiter's size, its rapid rotation period is only 10 hours.