Beyond the Solar System

Earth is in the Milky Way Galaxy:
- Our Sun is 1 of 1000's of stars.
- The Sun is roughly halfway along one of the spiral arms of the Milky Way.
- Distance between neighbouring stars in a galaxy is millions of times greater than the distance between planets in the Solar System.

Universe = More Than a Thousand Million Galaxies:
- Every Galaxy= thousands of millions of stars and the Universe = thousands of millions of Glaxies. 
- Galaxies are often millions of times further apart than stars are within a galaxy.
- The Universe is mostly empty space and is very…