Subject |
has material |
has rotation period |
is a kind of |
has temperature |
is an instance of |
has orbital period |
has radiu |
has distance from Sun |
has orbital velocity |
has perhelion date |
has discovery date |
has mass |
has synodic period |
has albedo |
has definition |
has inclination to the ecliptic |
has eccentricity |
has discoverer |
has composition |
superior planet | | | planet | | | | | | | | | greater than Pluto's mass and less massive than ten times Jupiter's mass | | | Planets farther from the Sun than the Earth is (i.e., Mars to Pluto). | | | | various elements |
terrestrial planet | silicates, oxides, water | | planet | | | | | | | | | greater than Pluto's mass and less massive than ten times Jupiter's mass | | | A planet having a compact rocky surface like Earth | | | | mostly made of heavier non-volatile elements |
Pluto | silicates, oxides, water | 6d9h17m49s | | 50-60 K | superior planet | 248.43 years | < 2900 km | 39.44 AU | Vorb 4.7 km s-1 | 1989 | 1930 | 6 × 1026 g, 0.1 to 0.2 MEarth | 366.7 days | < 0.25 | 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. | 17°.17 | 0.249 | Clyde Tombaugh | mostly made of heavier non-volatile elements |