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'''Planetology''' is the study of other planets, those in our solar system and those beyond it. It is also referred to as '''planetary science'''. Giv ...ti-spectrum telescopy overall and robotic space craft in particular in the solar system.

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...t]] closest to our Sun, and it is the smallest of the eight planets in our solar system, with only a 0.055 Earth mass (3.30e23 kg) and a diameter of 4,880 km. ...gov/vision/universe/solarsystem/planetsf-20060824.html Honey, I Shrunk the Solar System] NASA. “The International Astronomical Union has decided that, to be call

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...times, it has even been extended to include the other [[planet]]s of the [[Solar System]].

...f rock (as opposed to gas or ice). The other terrestrial planets in the [[Solar System]] are [[Mercury]], [[Venus]], [[Mars]] and the [[dwarf planet]] [[Ceres]]. Outside the Solar System, Earth-like [[planet|planets]] might harbor [[life]] as we know it. They wi

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...et)|Earth]] to the [[Sun]] used to provide relative distances within the [[solar system]]. ...as planets, dwarf planets, comets, and asteroids. For objects outside the solar system, it is more convenient to use [[light year]]s or [[parsec]]s. (A light year

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...f>''NASA'': '[http://solarsystem.nasa.gov/planets/profile.cfm?Object=Pluto Solar System Exploration - Planets - Pluto]'.</ref> ...stem.nasa.gov/planets/profile.cfm?Object=Pluto&Display=Facts&System=Metric Solar System Exploration - Planets - Pluto - Facts & Figures]'.</ref>

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Auto-populated based on [[Special:WhatLinksHere/Solar system]]. Needs checking by a human.

...or [[yellow]] in [[color|colour]]. It is moving rapidly relative to the [[Solar System]], as part of the [[Arcturus stream]] with 52 other stars, and in about 4,0

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...o the same position relative to the sun as seen by an observer outside the solar system. The sidereal year is 365.256 363 051 days (365d 6h 9min 9s) long.

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