Cosmology Lecture 1

(January 14, 2013) Leonard Susskind introduces the study of Cosmology and derives the classical physics formulas that describe our expanding universe.

Originally presented in the Stanford Continuing Studies Program.

Stanford University:

Stanford Continuing Studies Program:

Stanford University Channel on YouTube:

[Incognito-vcwj]

It's nice to be able to learn without the distraction of grades.

[andrewstang-green]

I love that we get to experience a higher education, even without the money we are so fortunate to have this information public.

The world is truly waking up! Thank you!

[mahakalkrishnaji]

I am. 82 years old.. I watch this to expand my knowledge. Thank you sir.

[janeg]

Loved watching this! I am a senior in high school planning on majoring in astronomy and I can't wait to learn more about our universe!

Update: I don’t remember making this comment lmao, it’s been a long time. But for those asking I did get my undergraduate degree in astrophysics and I am now a physics PhD student studying gravitational waves!

Update again: As of March 2024, I have officially passed my thesis defense and now have my doctorate in physics! I spent my time studying how noise can impact the gravitational wave detectors.

[PurnamadaPurnamidam]

Sitting in a small island in the Indian Ocean and learning from such a distant place without any fear is what Youtube should be. Thankyou Susskind sir you are one of a kind.

[Brian.]

Leonard is 83 now, and one of the absolute best presenters of science on Youtube.

[ottofrank]

No fancy stuff just a marker and a whiteboard and you learn the universe! That's the power of sir Susskind!

[RodneyAllanPoe]

"The Hubble...thingy." Thank you for uploading these. Gold.

[MrFancyGamer]

bruh it’s been 6 years since i’ve done high school math and I understood most of this, this professor is incredibly clear and makes it super interesting as well <3

[ibazulic]

Professor Susskind is an amazing professor, his lectures on whatever subject I watched were amazingly detailed and very methodical. And this one is no exception. Thank you, Stanford, for these lectures! And thank you, prof. Susskind, for allowing recording of your great lectures.

[litgnm]

Even though I'm not an equations kinda guy, I'm glad to have the privilege of watching this, especially free and from home.

[bakersmileyface]

This dude is a legend. I've read so many of his books. I didn't realise he did lectures online for free and now I'm gonna watch all of them.

Thank you for posting this. I am not very clever and am not confident in going to university to study this because it's a lot of money and time even here in the UK. But I'm really interested in it so I'm grateful that I can take my time to learn for free like this.

[johnb]

A pleasure to view.  Prof Susskind is an excellent lecturer in addition to the significant contributions he has made in his field.  Thanks for putting all his lectures up.

[jaz.]

I doubt that anyone is still looking at comments here, but I feel the need to express my profound admiration and respect for Dr. Susskind. He is the wisest, kindest, the most patient, and certainly the most interesting professor I have ever listened to. Stanford students are extremely fortunate. I wish you well. Dr. Susskind, and thank you so much.

[BoooDave]

I tell anyone who will listen... Stanford has several very interesting lectures online for all to watch. I wish everyone did the same

[brianruppert]

My late brother would have loved all this. He passed in 2005, so he missed out on the transformational introduction of college physics courses free on the internet. Remarkable development.

[VidelicetMoi]

To be honest, this class (because I despise "equations"-- class 1, 2, and 3) is way over my head; however, the manner in which it is presented is above par. I will watch again and again and again to grasp the instruction.

[anilsrivastava]

Dear Susskind, you are one of the greatest teacher of all.

[ritemolawbks]

I enjoy his lectures and can listen to him for hours. If only there wasn't a language barrier, I would have loved to have experienced the classroom lectures from Albert Einstein, Isaac Newton, and Galileo Galilei. The Q&A sessions would have been legendary.

[kspangsege]

"If only Newton had been a little smarter" - LOL!!!