A Big Bang Beginner’s Guide | Compilation

While there's still a lot that astrophysicists don't know about the Big Bang, there are some things we do know. So today, let's get caught up on the Big Bang basics.

Hosted by: Reid Reimers (he/him)

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Original Episodes:
Where Did the Big Bang Happen?
How (a Lack of) Bird Poop Proved the Big Bang
How Do We Know the Age of the Universe?

[carbon_no]

Reid Riemers is without a doubt my favorite host on SciShow Space.

[koffiegoeroe]

If the big bang was a comment it would be 'FIRST'

[DurokSubaka]

5:51 he said nuke-u-ler and the editor pointed it out, ha ha

[NewMessage]

It's not the size of the bang, it's how you bang it!

[sjonjones]

The Big Bang should be called the Cosmic Expansion Event to match the Cosmic Background evidence we've been able to collect. The former term is good for teaching the concept to 5-year olds.

[just_kos]

I was lucky enough to attend a panel at a Seattle-area sci-fi con, with Dr. Robert L. Forward. After the panel, he was gracious enough to answer my questions, lol! I told him I didn't quite understand, so he explained like you did, using an un-inflated balloon as an example. He said, Get a balloon and put dots on it evenly, then blow it up. The dots will appear to move away from each other as it expands. Oh man, he was so awesome. Very much a gentleman and patient with my queries! He presented the data that the farther away an object is, the faster it's moving away from us. I was so intrigued, thinking -- what if it's FASTER than the speed of light?! (Not realizing that space-time can expand as fast as it wants to).

(BTW, here's a tip if you love hard science fiction like I do: Read "Dragon's Egg" and its sequel "Starquake", by Dr. Forward. Extraordinarily good!)

[DoggosAndJiuJitsu]

Quick question, if speed slows relative time then how do we know how long it took for cosmic inflation? If it happened faster than light, which is the theory, then it could have taken a more appropriate amount of time than nearly instantaneously. There's a paradox there, but the question remains!

[sirwaldo]

The CMB is what I miss most about old televisions. Turn to not a channel and you could give a person direct evidence of the big bang. Hard to argue against evidence

[ebob]

Nice. Can't wait to become a professional Big Banger.

[UtahSustainGardening]

Yup, it is alway good to see Katelyn again, even if it is in an older video!

[buhbird]

So there is no real “center” of the universe but are there any ideas on what is at the edge of universe

[MosheMaserati]

I'm still waiting for an update on the Type 1A problem.

[gmsherry]

13:03 I just can't shake the feeling that the redshift should be BIGGER, not smaller. At the time it emitted the light we see, the supernova was a certain distance away, not merely moving away from us but accelerating away from us. Its redshift is a measure of its instantaneous velocity, right? At the moment we're observing it? That velocity is higher than its average velocity (because it's accelerating). So the redshift should be greater than the distance would imply. I know I must be wrong, but I don't know why, and reading about it doesn't help.

[_MrOcean]

With all the black holes we know about now, couldn't the fact that the big bang was essentially a starting point from which things expand from, be actually the other side of a black hole? ie. No big bang at all just an exit from a black hole somewhere? Just a thought.

[tobyihli]

Something that I take offense to is the scientists dismissal of the original definition of the word, “space.” For thousands of years we have referred to the void that exists in all directions, to infinity, within which the universe is contained.
The universe may be expanding, but the void, space, extends out further, still.

[BetzalelMC]

IMO: the Big Bang both “relatively “ happened an infinite time ago and yet it is still happening, and will continue to happen forever! Simply a result of theory I’m working on 😊🎉(note: it does not seem to discredit nor try to disprove any current ‘relatively accepted’ theories; if anyone reading this cares)

[agi]

The scary presenter guy is back with a bang.

[jacobosgood]

I love how Kaitlyn totally dodged the Crisis in Cosmology by not mentioning that the Cepheid Variable numbers come out significantly differently than the CMB numbers.

[GameOverAus]

SciShow is great, i look forward to weekly stuff that blows my mind. Keep it up Ladies and Gents :)
as for the Big Bang, i'm sure there's lots of people that believe they are the centre of the universe. What if the observations are different for who sees them, so if i looked i would see it slightly different to if you look and thus reality is in "the eye of the beholder" and we are each in our own Big Bang.

Another option is our universe is just an atom/black hole within a bigger reality and the Big Bang was just a supernova
.

[williandalsoto]

I don't usually watch these compilations, but I'm glad that I gave this one a shot!