Dwarfs in detail: how much do you know about the tiniest planets in the solar system?

Dwarfs in detail: how much do you know about the tiniest planets in the solar system?
Dwarfs in detail: how much do you know about the tiniest planets in the solar system?
Anonim

According to the definition of the International Astronomical Union, dwarf planets are celestial bodies that orbit around the Sun and have sufficient mass in order to maintain hydrostatic equilibrium under the influence of gravitational forces and have a close to spherical shape, however, they are not satellites of the planet. and also cannot clear the area of ​​their orbit from other objects.

dwarf planets

According to the definition of the International Astronomical Union, dwarf planets are celestial bodies that orbit around the Sun and have sufficient mass in order to maintain hydrostatic equilibrium under the influence of gravitational forces and have a close to spherical shape, however, they are not satellites of the planet. and also cannot clear the area of ​​their orbit from other objects.

We present to your attention 10 interesting facts about the dwarf planets of the solar system:

If the Sun were about the size of a standard front door, the Earth would be roughly the size of a 5-cent coin, and the dwarf planet Pluto, the largest known "dwarf" in the solar system, would be slightly larger than a needle's eye.

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Most dwarf planets are located in the Kuiper belt, a disk-shaped region that extends from Neptune's orbit to a distance of about 55 AU. e. from the sun. The closest dwarf planet Ceres is the largest and most massive body in the asteroid belt - the region of the solar system between the orbits of Mars and Jupiter.

The length of the day on dwarf planets is different. For example, one day on Ceres is equal to 9 Earth hours (this is exactly how much time it takes for a dwarf planet to rotate around its axis). The year on the "dwarf" is equal to 4.5 Earth years (the period of revolution around the Sun).

Dwarf planets are composed primarily of rock and / or ice. It all depends on their location in the solar system.

Some dwarf planets have natural satellites. The record holder for this indicator is Pluto, which has as many as five moons. But Ceres and Makemake have no natural satellites.

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Until now, not a single dwarf planet with a system of rings has been discovered. Previously, it was thought that Pluto may have rings formed by emissions from impacts of meteorites on its satellites. However, data from the Hubble telescope and the automatic interplanetary station "New Horizons" refuted this possibility.

The dwarf planets Pluto and Eris have a thin atmosphere that is more active when they are closer to the Sun.

New Horizons is the first and so far the only spacecraft to reach the Kuiper belt, which is home to most dwarf planets.

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Based on the available data, we can conclude that life on dwarf planets is impossible.

In 2006 Pluto was deprived of the status of a "full-fledged" planet and recorded it in the ranks of "dwarfs". This was done in connection with the discovery of many new objects in the outer part of the solar system, which led to a rethinking of the term "planet". Today, some scientists believe Pluto should be reclassified back to a planet.

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