Astronomy Glossary | OpenLearn - Open University

Skip to main content

The Open University
Accessibility hub
/ Sign out
Study with The Open University
Accessibility hub

Close

OpenLearn will be unavailable from 8am to 11am on Tuesday 25 August due to scheduled maintenance.

Skip to content

The Open University
Accessibility hub
/ Sign out
Study with The Open University
Accessibility hub

Close

OpenLearn will be unavailable from 8am to 11am on Tuesday 25 August due to scheduled maintenance.

header search Search for

Home
Free courses
Subjects
Study skills
Work skills
Help
Accessibility hub
Sign in

Create account / Sign in

The Open University
Accessibility hub
/ Sign out
Study with The Open University
Accessibility hub

Close

OpenLearn will be unavailable from 8am to 11am on Tuesday 25 August due to scheduled maintenance.

Home
Free courses
Subjects
Study skills
Work skills
Help
Accessibility hub
Sign in

sticky search Search for

My OpenLearn Profile

Personalise your OpenLearn profile, save your favourite content and get recognition for your learning

Create account / Sign in

Subjects
Science, Maths & Technology
All content
Astronomy Glossary
Summary

Astronomy Glossary

OpenLearn Enrolment

A glossary of terms used in astronomy

footer Menu

Get started
Explore subjects
About OpenLearn

Our partners

OpenLearn works with other organisations by providing free courses and resources that support our mission of opening up educational opportunities to more people in more places.

Policy

Twitter
Facebook
YouTube
Instagram

©1999-2026. All rights reserved. The Open University is incorporated by Royal Charter (RC 000391), an exempt charity in England & Wales and a charity registered in Scotland (SC 038302). The Open University is authorised and regulated by the Financial Conduct Authority in relation to its secondary activity of credit broking.

Accessibility statement
Conditions of use
Privacy and cookies
Modern Slavery Act
Copyright
Manage cookie preferences