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Many TNOs are often just assumed to have Pluto's density of 2.0 g/cm 3, but it is just as likely that they have a comet-like density of only 0.5 g/cm 3. [ 4 ] For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 ...
Pluto (bottom left) compared in size to the Earth and the Moon. Pluto's diameter is 2 376.6 ± 3.2 km [5] and its mass is (1.303 ± 0.003) × 10 22 kg, 17.7% that of the Moon (0.22% that of Earth). [125] Its surface area is 1.774 443 × 10 7 km 2, or just slightly bigger than Russia or Antarctica (particularly including the Antarctic sea ice ...
It takes over 10,000 years to orbit, and during the next 50 years it will slowly move closer to the Sun as it comes to perihelion at a distance of 76 AU from the Sun. [3] Sedna is the largest known sednoid, a class of objects that play an important role in the Planet Nine hypothesis. Pluto (30–49 AU, about 34 AU in 2015) was the first Kuiper ...
planet Venus: seen from Earth minimum brightness during transits. −2.94: planet Jupiter: seen from Earth maximum brightness [42] −2.94: planet Mars: seen from Earth maximum brightness [42] −2.5: Faintest objects visible during the day with naked eye when Sun is less than 10° above the horizon: −2.50: new moon: seen from Earth minimum ...
Alpha Centauri – star system nearest to the Solar System, at about 4.4 light years away Solar System – star and planetary system where the Earth is located. Earth – the only planet known to have life.
2018 AG 37 is a distant trans-Neptunian object and centaur that was discovered 132.2 ± 1.5 AU (19.78 ± 0.22 billion km) from the Sun, [8] farther than any other currently observable known object in the Solar System.
The surface of Venus is comparatively very flat. When 93% of the topography was mapped by Pioneer Venus, [15] scientists found that the total distance from the lowest point to the highest point on the entire surface was about 13 kilometres (8 mi), while on the Earth the distance from the basins to the Himalayas is about
Moving far backwards in time, more than 200,000 years ago Venus sometimes passed by at a distance from Earth of barely less than 38 million km, and will next do that after more than 400,000 years. Venus and Earth come the closest, but they come less often closer than Venus and Mercury . [ 10 ]