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Astronomy Puzzle 1

Astronomy Review
Across
The formation of our solar system
The force most responsible for the formation of a star
When a star is at its brightest
How a stars appears from Earth
Exist within our Solar System
Orbits between Mars and Jupiter
Main-sequence star
Transfer of heat from the sun to the earth using electromagnetic waves
A cloud of dust and hydrogen gas in our solar system
The study of the properties of light that depend on wavelength
How the sun produces it energy
Protects Earth's Atmospher
Down
Measure of thermal energy, average kenetic energy of atoms, and can be taken in various units
The process that produces the radiant energy of stars
EMS waves with longer wavelength than visible light waves but shorter than radio waves
Which two planets are most alike
A star's actual brightness
Transfer of heat through matter by molecular activity (touching)
The formation of the universe
As the source of light moves away from us the light waves spread apart occurring less frequently therefore having a lower frequency