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100
The study of the universe
What is astronomy?
100
bowl-shaped depressions on the Moon's surface
What is crater
100
is a large body that orbits a star.
What is planet
100
is a large, hot ball of gases, held together by gravity, that gives off its own light.
What is star
100
is a group of star clusters held together by gravity.
What is galaxy
200
is everything that exists, including Earth, the planets, the stars, and all of space.
What is universe
200
the shape of the Moon we see in the night sky.
What is phases of the Moon
200
is an object that orbits a planet
What is moon
200
is a group of stars that appear to form a pattern.
What is constellation
200
is our home galaxy
What is Milky Way
300
is a device that collects light and magnifies images to make distant objects appear closer, larger, and brighter.
What is telescope
300
when Earth blocks sunlight from reaching the Moon
What is lunar eclipse
300
consists of a star, such as the Sun, as well as all the planets, moons, and other bodies traveling around it.
What is solar system
300
the apparent shift in an object's position when viewed form two different locations.
What is parallax
300
a band of colors.
What is spectrum
400
one complete spin on an axis
What is rotation
400
when Earth passes through the Moon's shadow
What is solar eclipse
400
the tendency of a moving object to stay in motion.
What is inertia
400
the distance that light travels in one year.
What is light-year
400
as space expands, the absorption line begins to show
What is expansion redshift
500
is a vertical belt, about 15 degrees wide in longitude, in which all locations have the same time.
What is standard time zone
500
the regular rise and fall of the water level along a shore
What is tide
500
rocky or metallic objects that orbit the sun.
What is asteroids
500
a huge cloud of gas and dust in space
What is nebula
500
this expansion is sent out in all directions.
What is Big Bang