Galaxy
Contents
Key Stage 3
Meaning
A galaxy is a group of millions of stars held together by gravity.
About Galaxies
- Our home galaxy is called The Milky Way which contains around 400 billion stars.
- The nearest galaxy to The Milky Way is called the Andromeda galaxy and is 2,000,000 Light Years away.
- Galaxies are usually held together by a large Black Hole at the centre. The stars all orbit this central Black Hole.
- Scientists believe there are over 200 billion galaxies in the Universe.
Key Stage 4
Meaning
A galaxy is a group of millions of stars held together by gravity.
About Galaxies
- Our home galaxy is called The Milky Way which contains around 400 billion stars.
- The nearest galaxy to The Milky Way is called the Andromeda galaxy and is 2,000,000 Light Years away.
- Galaxies are usually held together by a large Black Hole at the centre. The stars all orbit this central Black Hole.
- Scientists believe there are over 200 billion galaxies in the Universe.
References
AQA
- Galaxies, page 250, GCSE Physics, Hodder, AQA
- Galaxies, pages 101, 102, GCSE Physics; The Revision Guide, CGP, AQA
- Galaxies, pages 320, 322, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
- Galaxies; and red-shift, page 256, GCSE Physics, Hodder, AQA
- Galaxy, pages 274-5, 280, 289-293, GCSE Physics; Student Book, Collins, AQA