What light can teach us about the universe - Pete Edwards

Humanity has long been looking at the universe and asking the big questions: How did it begin? How will it end? Cosmologists are searching hard for the answers, but where do they even start? The answer is light. Pete Edwards outlines the six unique messages that light carries which, when put together, disclose a stunning amount of information to astronomers.

Lesson by Pete Edwards, animation by Bevan Lynch.

[FeelingAwesome]

That last sentence “upon which we have yet to shed light” - good pun!

[Untoldanimations]

Is sound like the voice actor is in a glass box and the microphone is outside.

[silkthyme]

I always hear the term 'Doppler Effect' being thrown around but now I finally fully understand what it is!

[unpopuIaropinion]

I love it. So big and scary and yet so fascinating.
Now imagine how much we could achieve, if we stopped bombing each other for like one week.

[yogeshr]

man your like the most knowledge filled channel on youtube

[DoJoPetro]

_"In space, no one can hear you scream"_ is the tagline for the (Ridley Scott) film *Alien* —and is one of the most quoted / parodied in film history.
This quote is an oversimplification of fact. Yes, the vacuum of space transmits sound poorly—so you would not be able to hear anything.  Yet, to scream, you need air, so no one would hear you scream because you _could not scream._  That is, *unless* you were in a spaceship or space-station—and then, others there _could easily hear you scream_ —or sing *Space Oddity* —or whatever.

[sonnco]

How are people so smart?! What an inspiring video. Thank you!

[hhjjyang]

I'm a non-English speaker so it's difficult to fully understand when the video clip says scientific, medical things and it makes me study more. I hope I can understand every TED video someday:)

[TheSciGuys]

What a thought provoking, informative and visually stunning video!! I love all the TED-Ed videos!! 

[sahpion]

We are the universe experiencing itself.

[Deathsoulxx]

the audio on this video is amaizing, please make more videos loke this.

[Arikiatrukido]

"In space no one can hear you scream !"  goose bumps.

[diwitdharpatitripathi]

Light travels with the information, of all the medium it's interacted. Living or non living.

[hungtrumno]

Much more thanks if you add subtitles, for someone who cannot listen :D

[KasualKevin]

So humans were made by the universe, which in turn made things from the universe, to explore the universe? Wow, that's kind of trippy.

[ThatShyGuyMatt]

Still unsure why people think is crazy to think we were created by God, but its not crazy to think random events created everything from nothing. If I make a car house (like small scale obviously) out of Legos and said "I made this!". People would believe me. If I said "His house was made by nothing, it randomly came together!". People would think I was crazy. 

But somehow that logic doesn't apply to the universe. Sounds to me like people don't believe God created the universe because its scares them theres more to life then it being pointless. It scares them that even though they have free will, their afterlife could be them in hell. Which also scares them because it means they would have to change their worldly life. 

If I am wrong then explain how my lego house versus the universe examples are different from each other? Truth is people know God created everything, but its to hard for people to accept.

[ggsavv]

where do we live in, in a part of what? and this part is part of what? is this the ''everything''? what is the everything, when created, what was there before this created??  I ask those questions to my self since I was 9-10 years old... yet I have only answered one, we live on earth, the safest planet, why? because we live.

[shockwave]

I want to be an astronomer when I grow
So that no one can hear my screams

[juanmanuelmartinezchavez]

El universo me parece una de las máximas expresiones de Alegría y pasión de un Creador

[Hazard]

Outstanding lesson. Simple, yet very detailed. Great job!