Moon/space Flashcards
the circular path of an object as it revolves around another object due to gravity
Orbit
The sun and its family of orbiting planets, and moons, and other objects
Solar system
Millions or billions of stars held together in a group by their own gravity
Galaxy
Space and all the matter and energy in it
Universe
An object that orbits a more massive object
Satellite
A round pit left behind on the surface of a planet or other body in space after another smaller object strikes the surface
Impact crater
An imaginary line about which a turning body such as earth rotates
Axis of rotation
The motion of one body around another, example of earth around the sun
Revolution
One part of a pattern of temperature changes, and other weather trends over the course of the year
Season
In an orbit, a position and time in which sunlight shines equally on the northern and southern hemisphere
Equinox
In an orbit, a position and time during which ones hemisphere receives its maximum area of sunlight while the other hemisphere receives it minimum amount.
Solstice
A large dark plain of solidified lava on the moon
Mare
An event during which one object in space casts a shadow onto another
Eclipse
The dark central region of a shadow, such as the cone of complete shadow cast by an object
Umbra
The region of lighter shadow that may surround a dark central region. The spreading cone of lighter shadow cast by an object
Penumbra