TRIBUN-MEDAN.com – The Solar System is a collection of celestial bodies consisting of the Sun and all objects that revolve around it, including eight planets with elliptical orbits, five dwarf planets, 173 natural satellites that have been identified, and millions of other celestial bodies such as meteors, asteroids, comets. and others.
Informally, the Solar system can be divided into three regions: the inner Solar system which includes the four terrestrial planets and the main asteroid belt; the outer Solar system, which includes the four gas giant planets; and the solar system that is farthest from or beyond Neptune and is commonly called the trans-Neptunian region.
Each area has its own characteristics. The innermost region or solar system, for example, the four planets in it, or commonly called the terrestrial planets (terrestrial planet), has a dense rock composition, has almost no or no satellites and no ring system.
Objects from the inner solar system are close to the sun, the radius of this entire region is even shorter than the distance between Jupiter and Saturn.
Well, for more details about objects in the inner solar system, here’s an explanation:
Mercury
Not only is it closest to the sun (42,362,333 km from the sun), Mercury is also the smallest planet in the solar system, with a size of about 0.055 Earth masses. Mercury has no natural satellites and its geologic feature in addition to the known meteoroid craters are lobed ridges or rupes, possibly due to shrinkage in the early period of its history.
Mercury’s almost negligible atmosphere is made up of atoms that have been blown off the surface by solar winds. The size of the iron core and the thinness of Mercury’s crust are still unclear. It is hypothesized that the planet’s outer layers were detached after a giant collision, and their full (“accretion”) development was hampered by the Sun’s initial energy.
Venus
Venus, which is 67,054,076 km from the Sun is the size of Earth (0.815 Earth masses). And like the earth too, this planet has a thick silicate skin blanket and an iron core, its atmosphere is also thick and has geological activity. However, this planet is drier than Earth and its atmosphere is nine times denser than Earth’s.
Venus, which is the hottest planet with a surface temperature of 400 °C, has no satellites. Most likely due to the amount of greenhouse gases contained in the atmosphere. So far, the geological activity of Venus has not been detected, but because the planet does not have a magnetic field that can prevent the depletion of the atmosphere, it is suspected that the source of Venus’ atmosphere comes from volcanoes.
Earth
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