Vocabulary Flashcards
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
Tide
The water in the ocean
Waxing
One of the phase of the moon
Waning
One of the last phase of the moon
Gibbous moon
The second phase of the moon
Crescent moon
The fourth phase of the moon
Full moon
The fifth phase of the moon
New moon
The first phase of the moon
Quarter moon
The third phase of the moon
Orbit
The path of an object in space as it moves around another object
