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假如其他星球也有生命, 普林斯顿大学

273 个评分
66 个审阅


Are we alone? This course introduces core concepts in astronomy, biology, and planetary science that enable the student to speculate scientifically about this profound question and invent their own solar systems. All the features of this course are available for free. It does not offer a certificate upon completion....


创建者 RE

Aug 31, 2015

This was a very interesting class taught in such a manner that an undergraduate student majoring in any area would find interesting and educational, their is very much to learn for anyone

创建者 CN

Jan 26, 2016

The best course ever.! it really has the scientific detail that you do not find anywhere else in a clear simple and didactic way. The instructor is an amazing educator.


66 个审阅

创建者 gaocen

Jun 25, 2018

super cool and knowledgeable. review again.

创建者 Joy Smith

May 15, 2018

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

创建者 Raul Рауль

Apr 06, 2018

Something worthy.

创建者 luis juri

Mar 09, 2018


创建者 Serge Danan

Mar 07, 2018

Very clear, very interesting

创建者 derek j scarpelli

Feb 27, 2018

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your presentation on the 'dark streaks' on Mars' crater sides is outdated.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I can not continue your course for the obvious reason that some other data will be outdated.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.


derek scarpelli


创建者 叶斌龙

Feb 14, 2018


创建者 Aidan T.

Jan 07, 2018

i love it and iam 10 years old

创建者 Richard Kouzes

Jan 03, 2018

very interesting course

创建者 Justin Crevier

Sep 27, 2017

A fascinating, excellent, and well-taught course.