What three objects make up the Sun-Moon-Earth system?
Sun-Moon-Earth
Tides on Earth are mostly caused by the gravitational pull of
The Sun
The Moon
Stars
Asteroids
The Moon
Astronomers define this as all of space and everything in it
The universe

Neptune, Uranus, Saturn, Jupiter
This is how long it takes for light to travel in a year
a Light-year
Our gas giants have these around them and are made up of small dust particles to very large chunks of ice and dust.
Rings

Which is most likely when comparing X and Y?’
Planet X has a weaker gravity than Y
X has shorter years than Y
X has shorter days than Y
X rotates faster than Y
X has shorter years than Y
Our Milky Way is this type of galaxy
A spiral

Which planets are X and Y?
X is Venus and Y is Mars
X is Mars and Y is Venus
X is Mercury and Y is Mars
X is Mars and Y is Mercury
X is Mars
Y is Mercury
This is what holds everything in orbit in our solar system
The sun
What is the station that is used to study space and is used by multiple nations?
International Space Station
Which of the following helps keep the moon in its orbit?
Gravity
Longitude
Latitude
Friction
Gravity
This type of galaxy is how the orbit of Earth is
Elliptical
What celestial object is the X?
A)Saturn B)The Moon C)The Sun

The Sun
This is a group of single stars, star systems, star clusters, dust, and gas bound by gravity. (HINT: We live in the Milky Way, and it is a spiral one of these.)
A galaxy or galaxies
What can be used more than once to explore outer space?
A) Orbiter
B) Space Shuttle
C) Satellite
B) Space Shuttle
This is the most famous of all our comets
Halleys comet
This galaxy is not regular but...
Irrregular
What planet is known as the red planet?
Mars
What is the measurement from the center of the Sun to the center of the Earth?
An astronnomical unit
An Astronaut collected rocks from the moon. How would the weight and mass of the rocks on Earth compared to the moon?
The weight would be the same, but the mass would be different
The mass would be the same, but the weight would be different
The weight and mass would both be different
The weight and mass would both be the same
The mass would be the same, but the weight would be different
What type of fusion happens in the Sun?
Nuclear fusion
This type of galaxy is young and has black holes at its center.
Quasar
What planet has phases like our moon?
Venus
What is the length of a wave from crest to crest?
a wavelength