Weight on Planets

Aimed at pupils aged 11-14 this workshop makes use of some basic algebra and graphs to reinforce ideas about the effects of gravity and how these effects depend upon where in the Universe you are.

Angles in Astronomy

An arcsecond is a very small angle
Credit: NSO
Angles are used a lot in astronomy. We can measure both the size of an object in the sky and mark its position by using angles.

However, sometimes the angles are very small - much less than a degree. Therefore, astronomers often use things called arcminutes and arcseconds.