It's easy to feel frozen in place in our careers and lives when everything around us is up in the air. We can, however, practice strategies for creating our own sense of direction, in spite of the ...

A vector describes a movement from one point to another. A vector quantity has both direction and magnitude (size).

Learn and revise about vectors and how they can be can be added, subtracted and multiplied by a scalar with this BBC Bitesize GCSE Maths AQA study guide.

The brightness of a star is measured several ways: how it appears from Earth, how bright it would appear from a standard distance and how much energy it emits.