课程概述
热门审阅
RF
Sep 5, 2015
Definitely learned a lot but the exercises could have been a bit more involved.It's also too easy to get away with submitting blank essays, but I suppose that's to the loss of the student.
JN
Jun 7, 2022
Great class. Very interesting and applicable for the current status and challenges of space exploration.
101 - Imagining Other Earths 的 110 个评论（共 110 个）
创建者 Jawaad a
•Sep 9, 2020
i didnt recieve my certificate for this course why????
创建者 Pankaj A
•Apr 3, 2021
it was an interesting course
创建者 Richard K
•Jan 3, 2018
very interesting course
创建者 Jane M
•Dec 17, 2019
This course was not a good fit for me. Too much math (I really didn't know the derivation of every equation to get the gist of the information) and I did not really find the subject matter truly engaging until the last 3 weeks or so.
Aside from my personal issues with the course, I do not think it is suited to a MOOC format. The slides shown during the lectures were very hard to read, especially the ones with white backgrounds. Some of the questions pertained specifically to the day the lecture was given ("What planets are in the sky tonight?" can only be answered if you know what day the question was asked!) and some of the information outlined is now out of date. Most importantly, all of the grading in this class is done by peer-review. It's hard to do that unless there is a group all taking the class at the same time. A rolling enrollment MOOC is just not a good fit for this class.
创建者 derek j s
•Feb 27, 2018
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your presentation on the 'dark streaks' on Mars' crater sides is outdated.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I can not continue your course for the obvious reason that some other data will be outdated.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
创建者 Khan Z A
•Jul 25, 2020
The lectures are informative but too long and fail to keep the listeners interested. Overall very knowledgable for anyone interested in astronomy.
创建者 Raul G
•Apr 6, 2018
Something worthy.
创建者 Aidan K
•Mar 31, 2020
Something is broken in the course software - only the first week's page shows up, and that with the wrong course name.
Useless.
创建者 Zulfiqar a k
•Aug 4, 2020
i need my certificate plz on completing ts course
创建者 Md. F R
•Jun 25, 2020
a disgusting course, there is no certificate