True Colors
Twinkle Twinkle
Shape-Up
Vastness of Space
Misc.
100
An object so massive that even light cannot escape its gravity.
What is a black hole?
100
A huge sphere of very hot plasma that gives off light and other radiation.
What is a star?
100
The type of galaxy that has arms.
What is a spiral galaxy?
100
A collection of stars and the planets, gas, and dust between them.
What is a galaxy?
100
Everything physical in space and time.
What is the universe?
200
The change that occurs when a galaxy is moving away from us.
What is red-shift?
200
The most common color for old stars.
What is red?
200
A galaxy with no particular shape.
What is an irregular galaxy?
200
The distance light travels in one year.
What is a light-year?
200
All matter and energy in the universe was once a single point.
What is the big bang theory?
300
The change that occurs when a galaxy is moving towards us.
What is blue shift?
300
The most common color for new stars.
What is blue?
300
A galaxy that is round or oval.
What is an elliptical galaxy?
300
A group of galaxies.
What is a cluster?
300
What astronomers use to determine the elements in a star.
What are spectra?
400
A star that is fairly cool, but with a hot enough core for fusion.
What is a red giant?
400
A huge, bright explosion of a star.
What is a supernova?
400
The shape of our Milky Way.
What is a spiral?
400
The "missing" matter which may just be invisible.
What is dark matter?
400
The microwave radiation that comes from everywhere in the sky.
What is cosmic background radiation?
500
A small, dim, dense star.
What is a white dwarf?
500
The small, dense core of a star.
What is a neutron star?
500
The two particles that make up a deuteron.
What are a proton and a neutron?
500
The gas and dust between stars.
What is interstellar matter?
500
A source of strong radio signals which looks like a star.
What is a quasar?
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