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Historically, the solar system was composed of Mercury, Venus, Earth, Mars, Jupiter, Saturn, the Sun, and a smattering of moons. Then comets were realized and asteroids were discovered, and Uranus and Neptune were found. ... Number of Moons...
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burro.astr.cwru.edu/stu/planets_main.html
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Number of Moons ... Mercury is just under half the size of Earth, and has no moon. ... Mercury orbits the sun quickly, but it spins slowly on its axis. This means that the long days are very hot, and the long nights are very cold.
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www.morehead.unc.edu/Shows/SSA/planets/mercury.htm
www.morehead.unc.edu/Shows/SSA/planets/mercury.htm
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Mercury is probably a big metal ball covered by a rocky crust. The core (which is the big metal ball) is made of nickel and iron - ... Did you notice that Mercury doesn't have any moons? This is because it is too close to the Sun. The Sun is so huge (massive) that its strong gravity would suck a moon away in a second!
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www.sciencemonster.com/planets_mercury.html
www.sciencemonster.com/planets_mercury.html
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Color differences on Mercury are subtle, but they reveal important information about the nature of the planet's surface material. A number of bright spots with a bluish tinge are visible in this image. These are relatively recent impact craters.
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www.solarviews.com/eng/mercury.htm
www.solarviews.com/eng/mercury.htm
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This Java applet will serve as an aid for those who are interested in producing scale models of the planets and major moons of the solar system. ... There are a number of moons for which a mass value is not available. For these moons, all reports will contain a value of "0.0" in the "Mass of Object" column of the report...
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www.astrodigital.org/astronomy/ss.html
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Mercury is the closest planet to the Sun and the eighth largest. Mercury is smaller in diameter than Ganymede and Titan but more massive. ... In Roman mythology Mercury is the god of commerce, travel and thievery, the Roman counterpart of the Greek god Hermes, the messenger of the Gods. ... Number of moons...
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www.boskowan.com/www/jirka/vesmir/planets/merkur/merkur...
www.boskowan.com/www/jirka/vesmir/planets/merkur/merkur_en.htm
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Number of moons ... Planet Mercury Mean distance from Sun: 58 Gm (58,000,000 km)(46 to 69.8 Gm) Diameter : 5 Mm (4,880 km) Rotation period: 58.6 days Orbit period: 87.97 days Surface gravity: 3.6 N/kg (0.37 of Earth) Mass: 0.05 of Earth Surface Temperature: -180—C to 420—C Overall colour: orange Moons: 0 Planet Venus...
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www.ghandy.uklinux.net/solar.html
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Most of the other planets in our solar system also have moons. The number of moons ranges from one for the Earth, to as many as 21 for Uranus. Two of our planets, Mercury and Venus, have no moons.
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www.seasky.org/celestial-objects/moons.html
www.seasky.org/celestial-objects/moons.html
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At first glance, Mercury appears to be no different than our moon. It is a dry, nearly airless world that is heavily cratered, and it is only 40% larger than our moon. The planet has not been resurfaced since its formation, and the lack of any erosional processes preserves the craters, much like our moon. ... Number of Moons...
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burro.astr.cwru.edu/stu/mercury.html
burro.astr.cwru.edu/stu/mercury.html
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