Solar Seystem Flashcards
Orbit
repeating path that one object in space takes around another one
Crescent moon
a curved shape that is wider in the middle than at its ends
Revolution
a complete, 360-degree turn or rotation
Gravity
A body that attracts other ones
Wanning
Unnaturally pale
Meteor
A streak of light
Quarter moon
The moon is a quarter lit
Comet
a celestial object consisting of a nucleus of ice and dust
Galaxy
a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity
Season
a single, dominant repeating pattern of fixed frequency
Heliocentric
having or representing the sun as the center, as in the accepted astronomical model of the solar system
terrestrial planet
Earth-like planets made up of rocks or metals with a hard surface
Meteor
a small body of matter from outer space that enters the earth’s atmosphere, becoming incandescent as a result of friction and appearing as a streak of light
Equinox
the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length
Geocentric
having or representing the earth as the center, as in former astronomical systems