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solar system

Terms in this set (19)

solar system
a system of planets orbiting the sun
space probe
a spacecraft that studies outer space
moon phase
refers to the illuminated portion of the moon in relation to the position of the Earth, moon, and sun
nebula
a cloud of interstellar gas
constellation
an arbitrary group of stars perceived to be a design. There are 88 of these
revolution
the action of a celestial body in an orbit
comet
has 3 parts: coma, nucleus, tail. frozen mass of ice and dust that orbits the sun
solar eclipse
when the moon passes between the sun and the earth
supernova
large exploding star
axis
imaginary line which a body rotates
asteroid
a small rocky body orbiting the sun
lunar eclipse
when the moon passes behind the earth and the shadow of the earth blocks the suns rays from striking the moon
black hole
a gravitational field so strong that even light cannot escape. Said to be created by the collapse of a large star
spiral
a curve that winds around a fixed center point
rotation
the act of turning on an axis
satellite
a space craft that studies outer space
light year
the distance that light travels in a vacuum in one year
galaxy
a group of stars and planets
telescope
a device used to look into space with clear focus
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