Vocab For 1/12/16 Flashcards
(33 cards)
Solar system
The sun with celestial bodies that revolve around it
Galaxy
A collection of star systems
Universe
Everything that exists everywhere
Satellite
A celestial body orbiting around a planet or star
Impact crater
A large round pit caused by another small object
Axis of rotation
The center around which rotates
Revolution
A single complete turn
Season
One of the natural periods into which the years divided by the equinoxes and solstices or atmospheric conditions
Equinox
Where the sun crosses the plane of the earths equator
Mare
A female equine animal
Eclipse
Where one celestial bodies obscures another
Umbra
A region of complete shadow resulting from total obstruction of light
Penumbra
A fringe region of partial shadow around a umbra
Astronomic unit
A unit length used for distance within our solar system
Ellipse
A closed plane curve with a oval shape
Terrestrial planet
A planet having a compact rocky surface like earths
Gas giant
Any of the four outermost planets in our solar system
Asteroid
A small celestial body composed of rock and metal
Comet
A relatively small extraterrestrial body consisting of frozen mass that travels around the sun
Meteor
Small extraterrestrial body that hits earths atmosphere
Meteorite
A stony or metallic object from space that hits earth
Geocentric
Having the earth as a center
Heliocentric
Having the sun as the center
Gravity
The force of attraction between all masses in the universe
