Words Flashcards
(33 cards)
Satellite
An object that orbits a more massive object .
Orbit
The oath of an object in space as it moves around another object due to gravity .
Solar System
The sun and it ps family if orbitionf planets and moons
Impact crater
A round our left behind on the surface of a planet after a smaller object strikes the surface .
Galaxy
Millions and billions of stars held together in a group by their own gravity .
Universe
Space and all the matter and energy in it .
Axis of rotation
An imaginary line about which a turning body such as Earth rotates .
Revolution
The motion of one body around another , such as the Earth and its orbit around the sun .
Seasons
One of a pattern of temperature changes and other weather trends over the course of a year .
Equinox
In an orbit , a position and time in which sun shines equally on both hemispheres.
Solstice
In a orbit , a position in time during which one hemisphere receives the maximum sunlight .
Mare
A large dark plain of 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 a dark central region
Astronomical unit
The average distance from the sun which is 93,000,000 miles .
Ellispe
An oval or flattened circle .
Terrestrial planet
A planet that has a rocky surface .
Gas giant
A large planet that contains mostly of gasses in dense form.
Asteroid
A small rock body that orbits the sun .
Comet
A body that produces a coma of gas and dust , a small icy body that orbits the sun .
Meteor
A brief streak of light produces by s participants,e entering Earths atmosphere at high speed .
Meteorite
A small object from outer space that passes through Earths atmosphere and reaches the surface .
Geocentric
Earths centered theory of the solar system.
