Views : 33,221,144
Genre: Education
Date of upload: Sep 22, 2020 ^^
Rating : 4.94 (11,751/774,191 LTDR)
RYD date created : 2022-04-09T21:55:54.879214Z
See in json
Top Comments of this video!! :3
There is another even bigger category of stars called quasi-stars or black hole stars. They could only form very very early in the history of the universe, when most matter was still spread out evenly (and very very hot), allowing these quasi-stars to grow beyond 67AU in size. So big, in fact, that even when their core went supernova and turned into an intermediate-size black hole, it couldn't blow away the outer shell while the infalling materials radiated enough energy to keep the outer shell from collapsing. Ultimately they run out of material though, and the shell collapses as well. These only lasted 7 million years, so even the likelyhood of ever seeing one at the edge of the visible universe is slim. They cannot be created anymore either, space is mostly empty now compared to just after the big bang. These would also explain the existance of super-massive black holes, as they are too heavy for so early in the universe... but it's also hypothetical. Pretty cool though...
309 |
I remember back when Betelgeuse was the largest star. It is truly amazing to see how far we have gotten in such little time.
I remember when Hubble was launched. I remember when NASA had to admit that Hubble wasn't sending back clear photos. So it took 2 years and these were 2 very long years to send a mission to it and basically gave Hubble a pair of eye glasses.
Fast forward and a telescope was being built and my uncles name would be attached to it. They launched the James Webb Telescope and put it to where if something went wrong, it would just be lost.
My lovely wife asked me why would it be so hard to get to the telescope? I said, well the Saturn 5 rocket was the largest rocket to ever send a person or persons into space. It was almost as tall as the state capital building in Baton Rouge Louisiana where we lived. Now this was just to get man to the moon and back. The JWST is 4 times futher away and I couldn't imagine the fuel for that trip.
30 |
0:14 Well, it's true planets would like to be stars, they just don't have enough material.
51 |
@kurzgesagt
3 years ago
We created our first app ‘Universe in a Nutshell’, together with Tim Urban of Wait but Why! You can get it here: Appstore: kgs.link/universe-app-ios Google Playstore: kgs.link/universe-app-android Oh boy. Making an app is hard. It seemed so easy when we started. We underestimated the necessary work load and all the potential problems tenfold – this is not a figure of speech, this took ten times longer than we thought it would. And we are sort of used to working on big projects. So the first update to the app should hopefully be here in the next 24 hours (we are waiting for approval of the update in the app stores) – it will fix a bunch of small things that slipped through. We’ll constantly improve this thing because while it was honestly a horrible nightmare to make, it also was fun and we want to get better at it and make more things in the future. In case you don’t know Wait but Why btw, it is the best and most fun blog on the internet (waitbutwhy.com/2020/09/universe.html) and if you don’t know it you should change that like right now. Tim and I collaborated for the first time in 2013 and we have been good friends ever since. And this thing was something we started talking about years ago. So what is this thing we made and why? You can seamlessly travel from the smallest things in existence, past the coronavirus, human cells and dinosaurs all the way to the largest stars and galaxies and marvel at the whole observable universe. You can learn more about each object or simply enjoy the sheer scale of it all. It’s a fun plaything. The app is inspired by the “scale of the universe” website by the Huang Twins that Tim and I spent a lot of time with when it came out years ago – and felt that it was finally time to create a Wait but Why and Kurzgesagt version. There are no in-app purchases and no ads. All future updates are included! Since this is our first app we would love to hear your feedback so we can improve it over time. Leave us a five star review if you want to support it. Kurzgesagt and all the projects we do are mostly funded by viewers like you. So if you like the app we’ll make more digital things in future! Ok! Thank you for reading – Philipp
9.1K |