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The Milky Way

The sun and earth's planetary system is located in a galaxy with this name.

Spiral Galaxies

This refers to large clusters of stars that are in the shape of an elongated oval and appear to be flat celestial objects.

Andromeda

This is the closest galaxy to the Milky Way Galaxy and is 2.5 million light years from earth.

Heliocentric Planetary System

This arrangement has its star at the center of the system with its planets orbiting around it.

The Origin of the Species

This is the life-work of naturalist Charles Darwin.

Astrophysics

This is the branch of astronomy that deals with the universe and the celestial objects located within it.

Law of Inertia

Galileo completed this theory of Aristotle's by adding that a body in motion tended to stay in motion, especially the denser their mass was.

Einstein's Theory of Special Relativity

This theory is represented...

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