a Meteor shower is caused from Earth passing through debris left behind by these.
What are comets?
100
when a red giant burns out, it leaves a void so dense that the gravitational force is stronger than the speed of light sucking in all matter that comes close.
What is a black hole?
100
the big dipper belongs to this large constellation.
What is the great bear, or ursa major?
200
The side of the moon we never see.
What is the Far side of the moon?
200
The 4 inner planets are also referred to as these.
What are the terrestial planets?
200
Most asteroids come from the Main asteroid belt, found between these two planets.
What is between Mars and Jupiter?
200
when charged particles from the Sun collide with air molecules.
What is an aurora?
200
an easily recognized pattern of stars.
What is an asterism?
300
the dark basalt filled regions of the Moon's surface.
What are maria?
300
All planets within our solar system orbit the Sun in this direction.
What is counterclockwise?
300
The composition of an asteroid.
What is rock and metal?
300
The heat and mass of a star are also directly related to this.
What is color of the star?
300
motion used to describe the apparent backwards movement of an object.
What is retrograde motion?
400
The moon has the most direct affect on the Earth because of this.
What are ocean tides?
400
The three dwarf planets within our solar system.
What are pluto, ceres, and eris?
400
The direction of a comets tail points this way.
What is away from the Sun?
400
Most widely accepted scientific explanation for creation of the Universe.
What is the Big Bang Theory?
400
The distance between Earth and the Sun is measured as this.
What is an astronomical unit?
500
This explains why we only ever see the Near side of the moon.
What is, the moon's rotation is the same as its revolution around Earth?
500
The name given collectively to planets within our solar system that reside far from the Sun, are large, and have gas composition mostly of helium and hydrogen.
What are the gas giants?
500
The region beyond Neptune where most comets come from.
What is the Oort Cloud?
500
Our Sun will slowly burn out becoming this.
What is a white dwarf?
500
a cloud of interstellar gas and dust in which stars are formed from.