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 |