In the vast universe, galaxies rotate in ways that don’t make sense if only visible matter is considered. For almost a ...

In this episode, James and Ellie explore gravity, gravitational field strength, weight and how to use an equation to calculate them. ELLIE: Hello and welcome to the BBC Bitesize Physics podcast.

Gravitational fields distort the light reflected by asteroids, skewing observations and delaying detection. Del Barco Novillo’s formula strips away this distortion, allowing astronomers to ...