'A Universe From Nothing' by Lawrence Krauss, AAI 2009 on HackerTube: recommended by 7 Hacker News commenters across 7 separate months, 2009–2024.
lecture · dated
Lawrence Krauss's 2009 talk on the current picture of the universe, how it will end and how it could have come from nothing. It covers the expanding universe, cosmic background radiation and the cosmological constant.
HN regards it as a famous, mesmerizing talk, especially for the point that distant galaxies will become unobservable.
“There is also one of my favorite talks tangentially related by Lawrence Krauss.”
9 Hacker News comments link this video. Each one links back to its thread.
There is also one of my favorite talks tangentially related by Lawrence Krauss. He explains that eventually a civilization exploring the universe around them will only see it's own galaxy and likely believe that's all there is. We are living in an extraordinary time where we are still able to see other galaxies. ▶ this video
in “The universe is expanding faster than expected” · View on HN
I feel this video is apt for this topic - Laurence Krauss - A universe from nothing. ▶ this video It had me mesmerized and mystified for the whole run.
in “Weird Physics Facts” · View on HN
Everything from 3 blue 1 brown: [link] Visualization of Quantum Physics (Quantum Mechanics): [link] history of the entire world, i guess: [link] TIMELAPSE OF THE FUTURE: A Journey to the End of Time (4K): [link] Humanity was born way ahead of its time. The reason is grabby aliens. and Grabby aliens: when we'll meet them, how big they are, and other predictions [link] [link] Everyday Astronaut videos (he has 90 min documentary on Soviet rocket engine): [link] Cool Worlds - a lot of 25-35 min very nice astronomy explanations: [link] 'A Universe From Nothing' by Lawrence Krauss: ▶ this video
in “Ask HN: Long-form info-dense videos on YouTube you would recommend to anyone?” · View on HN
reminds me of this joke from a lecture Lawrence Krauss gave in 2009 of his work in 'A Universe From Nothing': > it was made after the discovery that on a log log plot everything is a straight line(o) i'd recommend the entire lecture, but definitely at least check out the anecdote this joke bookends it is about hubble's original 1929 embarrassing failed attempt to calculate the rate of the expansion of the universe(i) (o) ▶ this video (i) ▶ this video
in “Why isn't everything normally distributed?” · View on HN
Lawrence Krauss talked about this in his entertaining and famous talk, A Universe From Nothing[1]. [1] - ▶ this video
in “The Disappearing Universe” · View on HN
Slightly off-topic, but—how mercilessly correct he is about physics of our space-time. We all know the universe is expanding, but many consequences of this phenomenon are not obvious—such as that after some time we'll be unable to see (and therefore ever reach) even nearby galaxies, since they're constantly getting farther and farther away. We'll be completely alone forever, and future scientists would have completely wrong picture about universe in such an absence of information. Thinking about that, we already miss a lot of information because of red shift… There're facts potentially explaining the eternal question ‘about universe and everything’, but they are slipping away from us, crossing the event horizon never ever to be learned about. Not a fun thing to know. Personally for me that was a discovery thanks to the explanation by Lawrence Krauss in his ‘A Universe From Nothing’ popular talk ( ▶ this video ).
in “Notch's next game is an MMO” · View on HN
"I confess that something in me tightens whenever I hear a scientist pontificating on issues that belong to the arena of philosophy or metaphysics. I will gladly listen to Stephen Hawking when he holds forth on matters of theoretical physics, but he’s as qualified to talk about philosophical and religious issues as any college freshman." The existence of the universe is very much a matter of theoretical physics and Steven Hawking, understanding this, is surely more qualified to talk about such issues than Rev. Robert Barron regardless of his opinion that they are philosophical or religious. I don't know what prompted Steven Hawking's appearance in the media with this opinion, but here is a lecture on one explanation for why the universe does not need any first cause, ▶ this video
in “Stephen Hawking's answer to God question tiresome” · View on HN
Lawrence Krauss has given a talk that mentions something similar. He says that we live in a good time because we can still see "everything" around us. At some point in the far future, any observers won't be able to determine many things about the universe because the "stuff" in it will be too far away to observe. ▶ this video @ 50:57
in “Why Is Light So Fast?” · View on HN
In his famous talk "A Universe from Nothing", Lawrence Krauss makes the same point, if slightly less definitively. ("We may never know", and that's okay - ▶ this video ) By analogy he describes how, due to the expansion of the universe, Milky Way residents 100 billion years from now will be unable to observe the cosmic background radiation or any galaxy but our own. Civilizations wil evolve, invent science, use the best tools possible, and incorrectly conclude that the universe consists of one single galaxy alone in a vast sea of empty space. When we triply rewrite hard drives, we understand that information can be destroyed. Sometimes the universe does the samething. Sometimes information is irretrievably lost.
in “We don't know how the universe began, and we will never know” · View on HN