vocabulary
what is the term for the way something appears to move?
apparent motion
name all of the inner planets ?
Mercury ,Venus ,Mars, Earth
how many stars are estimated to be in the milky way?
more than 200 billion
how many galaxies are estimated to exist in the universe?
100 billion
what movement causes the stars to seem to circle around polaris?
earths rotation
what do we call a large round object that orbits a star?
planet
how many planet are in are solar system?
eight
what is the name of our galaxy ?
milky way
what is the visible part of the universe made up of?
billion of stars, dust and gas
which planets can be seen without a telescope?
Mercury, Venus, Mars, Jupiter, Saturn
what is the name of a group of stars dust and gas held together by gravity?
galaxy
what do we call the path that planets take as they orbit the sun?
orbit
how long dose it take for the sun to orbit the center of the milky way?
250 million years
what phenomenon causes stars to appear to shift positions each night?
EARTHS ROTATION
what is the name given to the streaks of light seen by ancient Greeks that led to the name of our galaxy?
milky circle
north star
which planets is known for having the most prominent rings?
saturn
what do astronomers believe our galaxy creates each year ?
7 new stars
what is the term for the way we see different stars at different times of the year?
Earths revolution around the sun
what causes the stars that were visible in the west to leave our view?
Earth's rotation
what is the name of the belt of rocky or metallic objects that orbit the sun ?
asteroid belt
what keeps the objects in the astroid belt from gathering inti another planet ?
jupiters gravity
what term refers to a huge group of stars, dust and gas?
galaxy
what do stars reflect that allows us the see them at night?
light from the sun
what is the process by which the Milky way creates new stars?
stellar formation