a planet that satellites go round
1Planet — This article is about the astronomical object. For other uses, see Planet (disambiguation) …
2planet — /plan it/, n. 1. Astron. a. Also called major planet. any of the nine large heavenly bodies revolving about the sun and shining by reflected light: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, or Pluto …
3Definition of planet — Photograph of the crescent planet Neptune (top) and its moon Triton (center) …
4IAU definition of planet — This article is about the formal definition established in 2006. For prior usage, see Definition of planet. The definition of planet set in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a… …
5Dwarf planet — Not to be confused with Minor planet. Ceres as seen with the Hubble Space Telescope. It is the only dwarf planet in the asteroid belt …
6List of natural satellites — This article is about the moons of planets and dwarf planets. For asteroid or minor planet moons, see Minor planet moon. Objects in the Solar System By orbit …
7Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
8space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
9celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… …
10Jupiter — /jooh pi teuhr/, n. 1. Also called Jove. the supreme deity of the ancient Romans: the god of the heavens and of weather. Cf. Zeus. 2. Astron. the planet fifth in order from the sun, having an equatorial diameter of 88,729 mi. (142,796 km), a mean …
