Front

Why is the light from distant galaxies red-shifted?

Back

They are moving away from us.

Front

The event that marks the beginning of our known universe

Back

Big Bang Theory

Front

What is the definition of the nebula?

Back

A cloud of dust and gas

Front

These were the first 2 elements to emerge after the Big Bang: Oxygen and Lithium, Hydrogen and Helium, Gold and Silver, Cadmium and Einsteinium

Back

Hydrogen and Helium

Front

Kepler’s 1st law says all orbits of celestial bodies are this.

Back

An elliptical orbit

Front

Kepler’s 3rd law states that a planet's orbital speed is proportional to this: It's height, The planet's width, It's distance from the Sun, The planet's color

Back

It's distance from the Sun

Front

Kepler's 2nd law states that an imaginary line connecting the orbiting planet to the sun sweeps an equal amount of this over an equal amount of time.

Back

Area

Front

This is when earth spins on its axis

Back

Rotation

Front

This is when the earth moves in an elliptical path around the sun

Back

Revolution

Front

This motion is very slow and is a change in the direction that earth’s axis points.

Back

Precession