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Moon, Tides, Solar

TermDefinition
1.Astronomical unit a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
2.Dwarf planet a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
3.Eccentricity – the quality of being eccentric.
4.Ellipse a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant, or resulting when a cone is cut by an oblique plane which does not intersect the base.
5.Gas giant a large planet of relatively low density consisting predominantly of hydrogen and helium, such as Jupiter, Saturn, Uranus, or Neptune.
6.Kepler’s laws The orbit of a planet is an ellipse with the Sun at one of the two foci
7.Orbit the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.
8.Orbital radius the distance from an object in space to the body which it is orbiting.
9.Planet a celestial body distinguished from the fixed stars by having an apparent motion of its own (including the moon and sun), especially with reference to its supposed influence on people and events.
10.Solar system the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
11.Terrestrial planet Earth-like planets made up of rocks or metals with a hard surface
12. Atmosphere the envelope of gases surrounding the earth or another planet.
13. Year the time taken by the earth to make one revolution around the sun.
14. Light year a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles).
15. Inner planet a planet whose orbit lies within the asteroid belt, i.e. Mercury, Venus, Earth, or Mars.
16. Outer planets a planet whose orbit lies outside the asteroid belt, i.e. Jupiter, Saturn, Uranus, or Neptune.
Created by: user-1863053
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