Study Guide Flashcards
The path of an object in space as it moves around another object due to gravity
Orbit
The Sun and it’s family of orbiting planets and moons and other objects
Solar
Millions and 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 put left behind on the surface of a planet after a smaller object strikes the surface
Impact Crater
An imaginary line about which a turning body such as Earth rotates
Rotation
The motion of one body around another, such as the Earth in its orbit around the sun
Revolution
One of a pattern of temperature changes and other weather trends over the course of a year
Season
In a orbit, a position and time during which one hemisphere receives the maximum sunlight
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
A region of lighter shadow that may surround a dark central region
Penumbra
Average distance from the sun which is 93,000,000 miles
Astronomical unit
An oval or flattened circle
Ellipse
A planet that has a rocky surface
Terrestrial planet
A large planet that consists mostly of gases in a dense from
Gas giant
A small solid rocky body that orbits the sun
Asteroid
A body that produces a coma of gas and dust, a small icy body that orbits the sun
Comet
A brief streak of light produced by a particle entering earths atmosphere at high speed
Meteor
A small object from outer space that passes through earths atmosphere and reaches the surface
Meteorite
Earth centered theory of the solar system
Geocentric
A sun centered theory of the universe
Heliocentric
