Hopping around to find online astronomy courses I found a website "Openlearn" from The Open University. There objective :
Interested in a new topic and want to dig deeper? Or maybe you're passionate about a subject. Whether it’s a five minute exploration or a 24-hour expedition into learning that you’re after, you’ll find it on OpenLearn for free. OpenLearn is a free learning platform, delivered by The Open University as part of its Royal Charter commitment to support the wellbeing of the community. We're proud to say that it reaches over 6m learners a year.You will find almost 1,000 free courses, topical and interactive content, videos and online games on OpenLearn.
Some of the free astronomy courses :
- Astronomy with an online telescoop
- The Big Bang
- Comparing Stars
- The evolving Universe
- Galaxies, stars and planets
- In the nightsky : Orion
- An introduction to active galaxies
- An introduction to exoplanets
- Microgravity : living in the ISS
- The Moon
- Moon of our Solarsystem
- Motion under gravity
- An overview of active galaxies
- The restless universe
- Scattering and tunneling
- The science of nuclear energy
- The Sun
- Telescopes and spectographs
- What are waves
Beside these free courses there are another 462 articles, videos, lectures,... on astronomy.
