super cool and knowledgeable. review again.

Thorough, lengthy, weeks-long grounding in the subject. Only problem is stupid peer review.

Something worthy.

E

Very clear, very interesting

https://www.nasa.gov/image-feature/jpl/pia22240/splitting-slope-streaks

Sorry Professor David>>>your presentation on the 'dark streaks' on Mars' crater sides is outdated. I personally have studied these some 10 years ago having followed the 3 rovers and the lander 10 years ago and watched the water sublimate from the Phoenix digs, at that point I knew 'instinctively' that the dark lines were sand. Please see NASA link above.

I can not continue your course for the obvious reason that some other data will be outdated.

However, I truly have enjoyed your presentation method and if and when your updates to other lectures are complete I will endeavor to complete the lecture course.

Thank you.

yt

derek scarpelli

Canada

非常好的课程

i love it and iam 10 years old

very interesting course

A fascinating, excellent, and well-taught course.

When i saw the first video, i got a lot of knowledge and i am very interested to listen more

Well explained and easy to understand. Excellent job!

Really enjoyed the first dive into astronomy and planetary science!

Great class with an interesting and diverse amount of content.

Really enjoyed the course. It gave a very comprehensive introduction to Astrobiology and I enjoyed being pushed to write a science fictional short story at the end.

Great course and great delivery.

"Imagining Other Earths" introduces one to astonishing aspects of planetary science, delivered expertly by David Spergel, Charles Young Professor of Astronomy on the Class of 1897 Foundation and Chair. I found the course to be invaluable in improving my understanding of the universe in which we live. Professor Spergels unassuming, inimitable style of delivery leads one to an easy understanding of complex concepts. I found the Professor and the scientists who spoke with him in interviews which supported the lectures to be inspiring. I commend this course to anyone who is interested in understanding the universe.

Amazing course

This class was an exceptional journey into the world outside our own - and the details, balance, and intricacies of an ever changing universe. Professor Spergel is an incredible asset to the world of astrophysics and I feel truly lucky that he took the time to teach us. I happily anticipate leaning even more on this fascinating subject.

This is simply fantastic! Such a charismatic lecturer leading us so professionally through heavy subjects in a light manner! Looking forward to more courses!

This is a wonderful course, even for somebody, such as myself, who tends to freeze in terror when presented with mathematical equations of any sort. I'm a linguist, artist and musician, so no physicist, and yet have found here a wealth of imagination and knowledge that is accessible, even if only at the broadest level, to anyone, regardless of their academic background. Highly recommended.

Thank you very much for the course.

Very good and a good teacher

Excellent course with a lot of information served in the context and furthermore in the most understandable way.

Thanks for it.

This was my first coarse on Coursera, and it is an amazing coarse. The professor and the presentation are so vividly unique, even as a high school sophomore, I was able to understand a large part of it.