14 Best Astronomy Courses Online
We compared 14 Astronomy courses currently listed on Coursera, Udemy, International Open Academy and edX, priced from $19.99 to $179.00. 4 come from a named university or institution, including University of Cambridge, University of Colorado Boulder and The University of Hong Kong. They are ordered by our CourseAsk score, which is built from how thoroughly each course describes what it teaches, whether it comes from a named institution, and how it compares on price — not from star ratings, which our course data does not include.
- Courses compared
- 14
- Price range
- $19.99 – $179.00
- Providers
- Coursera, Udemy, International Open Academy, edX
- Last updated
- 18 Sep 2026
How these 14 courses were chosen
Every course below is a real, currently listed course from Coursera, Udemy, International Open Academy, edX, matched to "astronomy" by our catalog and ordered by our CourseAsk score. Courses whose own title names the topic rank above those only tagged with it.
The grade on each entry scores how much the provider publishes about the course before you pay — the length and detail of the description, whether it lists learning outcomes and objectives — and whether a named university or institution stands behind it. A is fully documented and institution-backed; E is little more than a title and a price. Courses with almost nothing published are left ungraded rather than marked down, because an unknown course and a poor one are not the same thing.
There are no star ratings on this page — the course feeds we license do not include them, and we would rather leave a column out than fill it with a number we cannot stand behind. What we do have is price: these range from $19.99 to $179.00, as listed by the provider when we last updated the page.
-
1
Astronomy and Cosmology: Exploring the Universe
Offered by University of Cambridge
Take a guided journey through modern astronomy, beginning with the Solar System and stars, progressing to galaxies and black holes, and concluding with the origin, evolution, and ultimate fate of the Universe. Across thr...
$49.00listed price -
2
Zero to Hero Stargazing: Basic Astronomy - The Bright Stars
Become a stargazer tonight. We make it easy for you to learn the stars. Don't start with a telescope! Learn the basics first.Zero to Hero Stargazing is the perfect online course for the absolute beginner.We make learning...
$29.99listed price -
3
Archaeoastronomy
Offered by Politecnico di Milano
Archaeoastronomy is the “science of stars and stones”. It is an interdisciplinary science in between architecture, archaeology, and astronomy. It studies the relationships between the ancient monuments and the sky, in or...
$49.00listed price -
4
Truth in Sight: Riptides of Astronomy
Space, the final frontierThese are the voyages of me, Master AliAnd my missionTo explore the lies of the EstablishmentTo seek out the truthAnd unfold new knowledge.To boldly go where no man has gone before.In this exciti...
$99.99listed price -
5
Introduction to Astronomy
What is astronomy? It is the study of everything in our wondrous universe, like the stars, planets, galaxies and comets. Learn astronomy in this introductory online course. Start now
$29.99listed price -
6
The Sun and the Total Eclipse of August 2017
Offered by University of Colorado Boulder
A total eclipse is one of the most spectacular sights you can ever see! It looks like the end of the world may be at hand. There is a black hole in the sky where the sun should be. Pink flames of solar prominences and lo...
$49.00listed price -
7
Venus - Approach with Extreme Caution
Venus – Approach with CautionVenus is the closest planet to the Earth but could hardly be more different. Spacecrafts melt and are pelted with sulfuric acid rain as they streak to the surface of Venus in pitch black skie...
$19.99listed price -
8
Project - Predicting Stars, Galaxies and Quasars with ML
Welcome to "Project - Predicting Stars, Galaxies, and Quasars with ML", a specialized course where the realms of astronomy and machine learning intersect to create a unique and compelling learning experience.About This C...
$19.99listed price -
9
Vũ trụ học - P.1
Đây là phần đầu của khóa học "Vũ trụ học". Trong phần này, người học sẽ tìm hiểu về các hạt và các lực cơ bản chi phối toàn bộ những qui luật phổ quát của vũ trụ, về cách mà các ngôi sao hình thành và cách mà chúng kết t...
$19.99listed price -
10
The 4 States of Consciousness
The latest and most current scientific discoveries in the areas of human Evolution, Quantum Physics and Astronomy come together in this course about how and WHY the universe was created the way it is - basically a giant...
$19.99listed price -
11
The Radio Sky I: Science and Observations
Offered by École polytechnique fédérale de Lausanne
Be captivated by the exotic objects that populate the Radio Sky and gain a solid understanding of their physics and the fundamental techniques we use to observe them.
$169.00listed price -
12
Our Place in the Universe
Offered by The University of Hong Kong
Learn how human understanding of the universe has changed over time.
$59.00listed price -
13
PredictionX: Lost Without Longitude
Offered by Harvard University
Explore the history of navigation, from stars to satellites.
$99.00listed price -
14
edX MOOC / Non-creditIntroduction to Astrophysics
Offered by École polytechnique fédérale de Lausanne
Learn about the physical phenomena at play in astronomical objects and link theoretical predictions to observations.
$179.00listed price
Best Astronomy Courses Online compared
Prices shown are the provider's listed price when we last updated this page. Confirm on their site before enrolling.
What the prices here tell you
The 14 priced courses on this page run from $19.99 to $179.00, with the middle of the range around $49.00 — a spread of $159.01. That is a wide gap for one subject. A higher price on this page usually reflects who is behind the course rather than how much material it contains, so it is worth opening two or three at different price points and comparing their syllabus before deciding.
Who is behind these courses
These courses come from Coursera, Udemy, International Open Academy and edX. The platforms differ in how they sell: some charge once per course, others expect a subscription, and the listed price is not always what you pay at checkout after a promotion. 4 of these are produced by a named university or institution, including University of Cambridge, University of Colorado Boulder and The University of Hong Kong — which usually means a fixed syllabus and a recognised certificate, rather than an individual instructor’s own course.
Before you enrol
Open the provider’s own page and check three things this comparison cannot tell you: when the course was last updated, what the syllabus actually covers in its later sections, and what recent learners say. Prices shown here are the provider’s listed price when we last rebuilt this page on 18 September 2026 — they change often, and a promotion can move them substantially. We earn a commission if you enrol through our links, which costs you nothing and never affects the order courses appear in.