Cosmic Microwave Background Explained

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HAS SPACE ALWAYS BEEN BLACK? As long as we've been around, YES. But the universe gets much more exciting, AND much BRIGHTER, as we start winding our clocks back to the early days of the universe. Near the beginning of the universe, when space was rapidly expanding, that dark night sky we know so well as actually…ORANGE! But why? Did the lights just go out, or did something more spectacular happen? Watch this episode of PBS Space Time and find out!

Extra Credit:
CMG Scissored Pair

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Hosted by Gabe Perez-Giz

[ryankelly]

It feels great to know that I’m actually just a hunk of cosmic recycling. Gives so much meaning to my existence

[lgmatias]

Which orange came first? The fruit or the color?

The Universe

[Zmunk]

so you mean to say black is the new orange?

[dragosvatamanu]

Wow my head hurts. I'm gonna have to watch this a few more times.

[AniSky]

As someone learning sign language, I can't help but be slightly bothered by the fact that this guy's hands are speaking complete gibberish.

[aaronbriggs]

This guy got me into science on this channel. I was devastated you said you was leaving.

[ossy]

Or we just live in a microwave/toaster

[mahatmaghabdu]

am i the only one who noticed the hum?

[puncheex]

Pretty good.  I would point out that the color of the universe started out far up in the gamma part of the spectrum when the temperature was very high soon after the Big Bang occurred, and the peak wavelength descended as the temperature cooled towards that 3000 degree figure, about 310, 000 years after the BB. So it was, to human eyes, incredibly actinic (blue-white) in color and descended through yellow to orange, at the point where the electrons got captured and it went abruptly transparent, but the sky still glowed in the orange, then red, then infrared, down to today's microwave.

[source]

Would this mean, that if you were to time travel you could determine your new "date" more or less by the wavelength of the cosmological background radiation? The shorter the wavelength, the earlier in the universe are you and the longer the wavelength, the further you traveled (or will have traveled) into the future.

[lukegearheard]

"It's never Aliens." Not with that attitude its not.

[MarcusMaddox]

Whoever is doing the greenscreen editing and animating your body all around is doing a really good job.

[julianlorch]

Could you please talk a bit slower? I'm a german Student, so I'm not familiar with english words being spoken at the speed of light. ;)

[cryptogod]

He is speaking so fast, i've turned the speed down to 0.75 and its just perfekt

[anushabenny]

that moment when you zone out and think you can still understand what's going on lol

[askdubi]

You guys are awesome.
Can you do an episode about gravity and maybe the problems with creating an artificial gravity in space.
thanks!

[Tharkz]

So... given enough time, FM radio is fucked up by background noise being stretched into the FM band? And what's the FCC going to do about the universe tabing in on unlicensed frequencies? :P

[jonahsahn]

This video just threw me into an existential crisis. HOW did this all get set into motion? WHO did it? WHY?

[PoojaDeshpande]

I like this guy...
I like this channel...
I like space...

subscribed

[albertmendoza]

So you mean that those microwaves would eventually be radio waves after some expanding?