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ASTRONOMY

Across
Plane of Earth's orbit
Partial eclipse
Pattern of motion that carriers energy but not matter
Protons plus neutrons
Apparent separation of the sun and planet as seen from Earth
Sun on celestial equator
Curved material that refracts and focuses light
Allows light to pass through
Combines concepts of speed and direction
Light dispersed into its constituent colors
Down
Type of star that never sets
First recorded use of astronomical telescope
Measures inertia
One of Kepler's laws
Soaking up light
Bending of light path when it encounters a new material
Gives off light
Moon lines up with the same star
Depends of number of neutrons in the nucleus
Apparent line where sky meets land