As with any field of scientific study, astronomy has a long list of important terminology. So we've put together this glossary where you can check you fully understand the meaning of the common terms, as well as some of the more unusual words.

A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- X -- Y -- Z

Words beginning with 'H' :

Habitable zone : the zone around a star where a planet can support liquid water (and thus life) on its surface. Also known as the Goldilocks zone.

Hertzsprung-Russell diagram : shows the relationship between stars luminosity and their temperature. It also shows the evolution of stars through their lives.

Hubble constant : a unit of measurement used to describe the expansion of the universe. It shows how fast an object is travelling away from us.

Resources :

To support the quizzes in each section, we've put together some extra resources to provide further information: