Space Flashcards
Solar system
The sun and its family of orbiting Planets, moon, and other objects.
Galaxy
Millions or billions of stars held together in a group by their own gravity.
Universe
Space and all the 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 in which a turning body, such as earths rotates
Revolution
The motion of one body around another, suck as earth in its orbit around the sun.
Season
On part of a pattern of temperature changes and other weather trends over the Course of a year.
Equinox
a time of year when daylight and darkness are nearly equal for most of earth.
Orbit
The path of an object in space as it moves around another object due to gravity.
Solstice
The time of year when days are either longest or shortest.
Mare
A large dark plain solidified lava on the moon
Eclipse
An event during which one object in space casts a shadow onto another.
Umbra
The dark ,central region of a shadow ,such as the cone of complete shadow cast by an object.
Penumbra
A region of lighter shadow that may surround an umbra
Astronomical unit
Earths average distance from the sun.
Ellipse
On oval
Terrestrial planet
Earth or a planet similar to earth with a rocky surface.
Gas giant
A large planet that consists most of gases
Asteroid
A small soiled,rocky body that orbits the sun.
Comet
A body that produces a coma of gas and dust
Meteor
A brief streak of light produced by a small particle.
Meteorite
A small object from outer space that passes through earths atmosphere.
