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physical object > natural object > celestial body > planet > terrestrial planet

terrestrial planet
subject			fact

terrestrial planet	has composition mostly made of heavier non-volatile elements
	has material silicates, oxides, water
	has definition A planet having a compact rocky surface like Earth
	is a kind of planet
planet	is a part of solar system
	has orbit
	has mass greater than Pluto's mass and less massive than ten times Jupiter's mass
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent

Kinds of terrestrial planet :

• Earth (31 facts) - Third planet from the Sun. First forms of life appeared about 3.2 to 3.5 × 10⁹ years ago (Homo sapiens appeared as a species about 10⁵ years ago).
• Mars (25 facts) - Fourth major planet out from the Sun. Its tiny satellites are locked in synchronous rotation with mars.
• Mercury (28 facts) - Innermost planet of the Solar System. Transits of the Sun occur either 7 or 13 years apart - last transit 1973 November 10.
• Pluto (18 facts) - The most distant known planet from the Sun. Its orbit has the highest eccentricity and highest inclination to the ecliptic of any planet and some astronomers suggest that it may be an escaped satellite of Neptune. In the mid-1970s Pluto crosses Neptune's orbit on its way in, and for the rest of this century Pluto will be closer to the Sun than Neptune (Pluto and Neptune, however, are never less than 2.6 AU apart). Its mass and radius have not been determined with any great certainty.
• Venus (24 facts) - Second planet from the Sun. Has retrograde rotation. Mariner 10 has established that the cloud tops rotate every 4 hours retrograde. Radar experiments have established that the surface is somewhat smoother than the Moon, but there are mountains and there is extensive cratering. Last transit of Sun was in 1882; next one will be 2004. Venus's rotation period is in synchronism with Earth - that is, at inferior conjunction the same side is always toward the Earth.