Science -solar system Flashcards
Solar system
The sun and its family of orbiting planets, moons, 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
ORBIT 〽️🌐
The path of an object in space as it moves around another object due to gravity; for example, the moon moves in an orbit around Earth
Impact crater
A round pit left behind on the surface of a planet or other body in space after a smaller object strikes the surface
Axis of rotation
An imaginary line about which a turning body, such as earths rotates
Revolution
The motion of one body around another, such as earth in its orbit around the sun; the time it takes an object to go around once
Season
One part of a pattern of temperature changes and the other weather trends over the course of a year
Equinox
In an orbit a position and time in which sun light shines equally on the northern Hemisphere and the Southern Hemisphere
Solstice
either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days.
Mare
a large, level basalt plain on the surface of the moon, appearing dark by contrast with highland areas.
Eclipse
an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination.
Umbra
the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
Penumbra
the shadow cast by the earth or moon over an area experiencing a partial eclipse.
Astronomical unit
a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
Impact crater
A round pit left behind on the surface of a planet or other body in space after a smaller object strikes the surface
Axis of rotation
An imaginary line about which a turning body, such as earths rotates
Revolution
The motion of one body around another, such as earth in its orbit around the sun; the time it takes an object to go around once
Season
One part of a pattern of temperature changes and the other weather trends over the course of a year
Equinox
In an orbit a position and time in which sun light shines equally on the northern Hemisphere and the Southern Hemisphere
Solstice
either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days.
Mare
a large, level basalt plain on the surface of the moon, appearing dark by contrast with highland areas.
Eclipse
an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination.
