The Universe (Oxford AQA IGCSE Physics)

The Universe

The universe

• The Universe is a large collection of thousands of millions of galaxies

  • The Universe is also the name given to the entirety of space

• A galaxy is a large collection of thousands of millions of stars

  • Stars are astronomical objects such as the Sun

• These stars are part of solar systems

• Each Solar system has a number of planets

The structure of the universe

The Milky Way

• The Sun is one of billions of stars in a galaxy called the Milky Way

• Other stars in the Milky Way galaxy are much further away from Earth than the Sun is

• Some of these stars also have planets which orbit them

The Milky Way galaxy