Course starts form very basic contents up to cosmology, astrobiology and so on. It is important to take in mind that reading materials contain a lot of information therefore additional time has to be dedicated in order to read everything, time it takes to read supplementary material does not mach with the time specified when a lesson starts,,

Amazingly fantastic course. I love this course from the depth of my heart. I have experinced and learnt a lot more about the universe and discovered a lot of unknown knowledge regarding astronomy. Astronomy has however been my forever love. But to say for sure, this course helped me love my passion even more. I will miss doing this course.

The professor, Chris impey was a very good teacher. He explained everything in the wide variety of things I learned from this course with amazing detail and made sure everyone understood. The course taught me many amazing things I hadn’t known before, and I would definitely recommend this course to anyone wanting to learn about astronomy.

An incredibly diverse, interesting course delivered in an easy to understand way by Professor Impey. The weeks just keep getting more interesting, and the ideas more abstract and on the frontier of current research. Would wholeheartedly recommend for anyone even vaguely interested in any aspect of astronomy - it's definitely worth doing.

Great introduction to astronomy. Clear explanations, good video content to enhance understanding and recall of the points being made, and good course structure(quizzes, writing assignments, and ability to get feed back in the forums). Also, the professor is available to answer astronomy questions in weekly video conferencing format.

Just fantastic. I enjoyed all of it and appreciated the range of topics, the inclusion of humour, the quizzes, writing assignments and activities were interesting and relevant. The opportunity to engage in current developments in Astronomy at the University of Arizona as a function of signing up for this course, is a wonderful bonus.

Even though I have had read plenty of material about Astronomy, the course presented it in a pleasent and informative way whoch allowed me to study more, wake my curiosity and pushed me to investigate beyond that. Chris is such a carismatic person and I was happy to take this course and get to know him and encourage me all way long.

The classes were informative and clear. I especially liked the interactive assignments where we could put our skills to the test. My only problem is that some of these videos are due an(other) update as the field progresses, which is why I had to constantly look up ongoing projects. It wasn't that much of a hassle, so still 5 stars

This is the second course I have done with Professor Impey and have enjoyed both - very little maths.

The lectures are clear and with a light touch. Very accessible. I am a pensioner who left school at 15. How lucky I am to have this opportunity. Especially in lock-down. Thank-you so much.

I also enjoyed Professor Impey's novel.

A very interesting course. For me the most interesting topic was Week 11 - Astrobiology. Prof. Chris Impey does a fantastic job of explaining everything in a fun and interesting way.

Since the science related to this subject undergoes so much innovation/development each year, i felt that the videos could be updated more frequently.

An extraordinary course which generally attracts lots of space enthusiasts like me and develops the interest in astronomy to take it up as a career. Since its not easy to study these kinds of subjects thoroughly at bachelors level especially in countries like India, its really a boon for the people out there and across the globe.

Astronomy: Exploring Time and Space, is a fantastic course! It offers the most in-depth explanations with great diagrams and infographics related to astronomy and astrophysics. I would highly recommend this course for amateur astronomers and students who are interested in learning the nature of the solar system and the universe.

I thought the course went well beyond my expectations and provided me with not just the knowledge of Astronomy but a certain wisdom about it that I never would have imagined when I first signed up. I will look at the night sky differently and with more understanding than I ever have before. And in this way I want to learn more.

The course gave me a good overview of Astronomy. I hope to continue learning and proceed with an accredited course in the same field. Prof Impey was easy to understand, the material was more than enough to answer any additional questions. The only problem was that most interviews were old and so the videos no longer available.

Excellent lectures. Fair quizzes. WELL worth the effort for a broad astronomy background.

I recommend this one as opposed to others (e.g. Confronting the Big Questions, which include ridiculous tests). Prof Impey's pace and quizzes are supportive and aid learning.

Also, Prof Impey has regular live Q&A which are excellent.

this is an excellent course ,i especially liked the final part on Astrobiology .Its bang up to date and well constructed . Had difficulty with getting images from the remote telescope .Should have better input for students to deal with problems by linking in with mentors or help chat lines. A thoroughly enjoyable experience .

Professor Impey covers an extensive subject using a clear and instigating language. The assignments and tasks proposed helps a lot the comprehension and make you search for more information.

One of the best online courses I have already had.

Congratulations to Professor Impey and all team that produced the available material.

This is the best course for those who are really interested in exploring space. You will be able to learn so many things about this universe including planets, stars, exoplanets, moons and my favourite topic black holes and galaxies. Thank you so much professor Chris Impey for explaining everything in space so beautifully.

I have done many online science courses and I think this is the best so far. I was familiar with some of the material but have learnt much more about astronomy and cosmology.

The standard of presentation is excellent, so much better than just transmitting someone writing on a board.

Many thanks to the University of Arizona.

I didn't quite know what I was signing up for when I stated this course. It goes into a lot of different aspects of astronomy that has given me a greater knowledge and understanding of our universe. While giving me the questions I need to explore. Chris Impey talks in a way you can understand and I will miss the lectures.

THIS COURSE WAS JUST SIMPLY AMAZING. IT GIVES YOU A BASIC INSIGHT OF ASTRONOMY WITHOUT GOING TOO MUCH DEEP YET WITH ALL RELEVANT INFORMATION. AND MOST IMPORTANTLY THE TEACHER WAS JUST BEYOND AMAZING. THE CONTENT WAS INTERESTING, THE VIDEOS WERE AMAZING AND TESTS AND QUIZZES WERE GREAT. I HAD SO MUCH FUN LEARNING IT ALL.

Excellent course for learning about the basics of astronomy. Amongst others it covers subjects as the history of astronomy, our sun and the solar system, comets, galaxies, quasars, pulsars and black holes. The course uses video's which clearly explain various topics with sheets and additional reading material provided.

I just wanna say WONDERFUL. Prof. Impey is a wonderful teacher. He teaches very complex subject very easily and without any mathematics. Those who are interested in this subject and are not so much good at physics,I wanna say them just enroll, It will make you understand.This course in best for beginners in Astronomy.

Excellent course, vast and up-to-date material, text videos and well-produced slides. The learning is intensified through scientific concepts and teaching strategies, using information and communication technologies, the material is produced entirely by professionals in the scientific and teaching field of Astronomy.

I am taking this course again after some time, now I have found it even more interesting. Prof. Impey is really a great communicator and he makes complicated and sometimes boring concepts into easier and funnier ones. The quality of the videos is very good. I think I will enjoy this course as much as I did before.