Vocabulary Flashcards
(33 cards)
Solar system
The sun and its family of orbiting planets moons and other objects
Galaxy
Millions or billions stars held together in a group by their own gravity
Universe
Space and all I he matter and energy in it
Satellite
An object that orbits a more massive object
Impact crater
A round pit left behind on the surface of a planet
Axis of rotation
An imaginary line about which a turning body such as earth rotates
Revolution
The motion of one body around another
Season
One part of a pattern of temperature
Equinox
In an orbit a position and time
Mare
A large dark plain
Eclipse
An event during which one object in space casts a shadow
Umbra
The dark central region of a shadow
Penumbra
A region of lighter shadow that may surround an umbra
Astronomic unit
Earth average distance from the sun
Ellipse
A oval or flattened circle
Terrestrial planet
Earth or a planet like earth
Gas giant
A large planet that consists mostly of gases
Asteroid
A small solid rocky body
Comet
A body that produces coma of gas
Meteor
A brief streak or light
Meteorite
A small object from outer space
Geocentric
All features on earth surface
Heliocentric
All water on earth
Gravity
The space in space
