Astronomy with an online telescope
Astronomy with an online telescope

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Free course

Astronomy with an online telescope

6 Summary of Week 2

This week you have learned about how your eyes can adapt to the dark and how to use the sensitivity of your night vision to best effect in observing the night sky. You have also discovered how using optical instruments to collect more light can allow you to see more and fainter objects.

You have seen how telescopes work, and understand why mirrors rather than lenses are used as the primary imaging elements in large telescopes such as COAST.

Finally, you have learned about the effects of the Earth’s atmosphere in order to understand why telescopes such as COAST are often located at remote sites above the most turbulent layers of the atmosphere.

Next week you will look in more detail at how to plan your observations and in particular at how the brightness of objects is measured so that you can tell whether you need just your eyes, binoculars or a telescope to observe them. You will then have everything you need to move forward and use the COAST telescope for the first time.

You can now go to Week 3 [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] .


Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371