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28 Cards in this Set

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  • Back
absolute magnitude
the actual brightness of a star
asteroid
a large space rock that orbits the sun
big bang theory
a theory that describes how the universe was created; a huge explosion in space that hurtled debris everywhere
black hole
an object in space with gravity so strong that it pulls everything into it, even light.
comet
a mountain sized chunk of ice and dust that orbits the sun
eclipse
an object in space casts its shadow on other another object
galaxy
a group of millions of stars
light-year
the distance that light travels in one year. used to measure distances between objects in space
lunar phases
the different shapes or phases of the moon in one month
lunar eclipse
the earth casts a shadow on the moon.
meteor
a streak of light made by a burning meteroid in the earth's atmosphere
meteorite
a meteoroid that strikes the earth's surface
milky way galaxy
the galaxy that our solar system is part of
moon
a natural object that orbits a planet
nebula
a cloud of dust and gas in space
orbit
the path that an object in space takes around another object
planet
a large object that orbits a star
radio telescope
a dish-shaped telescope that collects radio waves from outer space
reflecting telescope
a telescope with 2 mirrors and 1 lens
refracting telescope
a telescope with 2 lenses
revolution
one complete trip of a planet around the sun
rotation
the spinning of a planet or a moon on its axis
satellite
an object either natural or manmade that orbits a planet
solar flare
an eruption on the surface of the sun
solar system
the sun all objects that move around it
star
an object in space that produces its own heat and light
solar eclipse
the moon casts a shadow on the earth
telescope
a tool for observing objects at a distance