Term |
Definition |
Asteroid |
solid,rocky body that orbits the sun |
astronomical unit (AU) |
Earth's average distance from the sun |
axis of rotation |
imaganary line which a turning bod,rotates |
comet |
body that produces a coma of gas and dust |
corana |
outer layer of the suns amptnosphere |
eclipse |
one object in space casts a shadow onto another |
equinox |
sunlight shines equally on the northern hemisphere and the southern hemisphere |
galaxy |
billions of stars in a group by their own gravity |
light year |
distance light travels in one year |
mare |
solidifide lava on the moon |
metor |
breif streak of light produced by a small partcle |
penumbra |
reigon of lighter shadow that may surround an umbra |
revolution |
moition of one body around another |
satelight |
object that orbits a more massive object |
season |
defined and caused by the position of earths axis relative to the diriction of sunlight |
solar system |
sun and its famliy of orbiting planets, moons and other objects |
solistice |
one hemisphere gets its maximum area of sunlight |
umbra |
dark centralraegon of shadow |
universe |
space and all the matter and energy in it |