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Keywords: Solar System, dwarf planet
![Удаляясь от Меркурия](https://images.astronet.ru/pubd/2002/07/16/0001178328/mercuryoutbound_mariner10.preview.jpg)
16.07.2002
After just passing Mercury, the robot spacecraft Mariner 10 looked back. The above picture is what it saw. Mercury, the closest planet to the Sun, is heavily cratered much like Earth's Moon.
![Вид на внутреннюю солнечную систему](https://images.astronet.ru/pubd/2005/07/15/0001207255/jul8_westlake_cs72.preview.jpg)
15.07.2005
Only Mars is missing from this reflective view of the major rocky bodies of the inner solar system. Captured on July 8th, the serene, twilight picture looks out over the Flat Tops Wilderness area from near Toponas, Colorado, USA and includes planets Mercury, Venus, Earth, and Earth's large natural satellite, the Moon.
![Оболочки туманности Яйцо](https://images.astronet.ru/pubd/2006/03/07/0001212084/eggshells_hst_big.preview.jpg)
26.06.1999
The Egg Nebula is taking a beating. Like a baby chick pecking its way out of an egg, the star in the center of the Egg Nebula is casting away shells of gas and dust as it slowly transforms itself into a white dwarf star.
![Человечество исследует Солнечную систему](https://images.astronet.ru/pubd/2013/04/30/0001286504/ssmissions_frohn_960.preview.jpg)
30.04.2013
What spacecraft is humanity currently using to explore our Solar System? Presently, every inner planet has at least one robotic explorer, while several others are monitoring our Sun, some are mapping Earth's Moon, a few are chasing asteroids and comets, one is orbiting Saturn, and several are even heading out into deep space.
![Меркурий: ад, покрытый кратерами](https://images.astronet.ru/pubd/2004/09/13/0001199577/merc2_m10.preview.jpg)
12.09.2004
Mercury's surface looks similar to our Moon's. Each is heavily cratered and made of rock. Mercury's diameter is about 4800 km, while the Moon's is slightly less at about 3500 km (compared with about 12,700 km for the Earth). But Mercury is unique in many ways.
![Меркурий: ад, покрытый кратерами](https://images.astronet.ru/pubd/2001/08/24/0001170508/merc2_m10.preview.jpg)
19.08.2001
Mercury's surface looks similar to our Moon's. Each is heavily cratered and made of rock. Mercury's diameter is about 4800 km, while the Moon's is slightly less at about 3500 km (compared with about 12,700 km for the Earth). But Mercury is unique in many ways.
![На юго-западе Меркурия](https://images.astronet.ru/pubd/2003/02/16/0001186742/merc4_m10.preview.jpg)
16.02.2003
The planet Mercury resembles a moon. Mercury's old surface is heavily cratered like many moons. Mercury is larger than most moons but smaller than Jupiter's moon Ganymede and Saturn's moon Titan. Mercury is much denser and more massive than any moon, though, because it is made mostly of iron.
![Эрида: массивнее Плутона](https://images.astronet.ru/pubd/2007/06/24/0001222539/eris_lombry.preview.jpg)
19.06.2007
Eris, a dwarf planet currently orbiting the Sun at about twice Pluto's distance, has been measured to have about 27 percent more mass than Pluto. The mass was calculated by timing the orbit of Eris' moon Dysnomia.
![Хаумеа из внешней части Солнечной системы](https://images.astronet.ru/pubd/2008/09/23/0001229667/haumea_nasa.preview.jpg)
23.09.2008
One of the strangest objects in the outer Solar System was classified as a dwarf planet last week and given the name Haumea. This designation makes Haumea the fifth designated dwarf planet after Pluto, Ceres, Eris, and Makemake. Haumea's smooth but oblong shape make it extremely unusual.
![Эрида: самая большая из известных карликовых планет](https://images.astronet.ru/pubd/2006/09/19/0001216404/eris_keck.preview.jpg)
18.09.2006
Is Pluto the largest dwarf planet? No! Currently, the largest known dwarf planet is (136199) Eris, renamed last week from 2003 UB313. Eris is just slightly larger than Pluto, but orbits as far as twice Pluto's distance from the Sun.
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