TRUE Limits Of Humanity – The Final Border We Will Never Cross
TRUE Limits Of Humanity – The Final Border We Will Never Cross on HackerTube: recommended by 3 Hacker News commenters across 2 separate months, 2021–2024.
Kurzgesagt explains why, even with science-fiction technology, most of the universe is permanently out of reach because of cosmic expansion and finite resources.
What HN commenters said
8 Hacker News comments link this video. Each one links back to its thread.
dcwardellNov 2022Recommends
I always appreciate content like this which is easy to digest but still inspires awe in the universe around us. Scrolling around the map and looking further and further back in time reminded me of this Kurzgesagt video [0]. It's crazy to think how much of the universe is lost to and unreachable by us. Kurzgesagt has a lot of great content (even if it's a bit cartoonish). I'm sure they get things wrong, but I feel like they make an effort to research the topic first. [0] ▶ this video
in “Map of the observable universe” · View on HN
kibwenSep 2021Recommends
This is forgetting to account for the accelerating expansion of the universe. Even if one were to depart from Earth today, traveling at light speed, 94% of the observable universe is already impossible to reach. See this excellent video for more detail: ▶ this video
in “The universe has already made almost all the stars it will ever make” · View on HN
unyttigfjelltolSep 2021Recommends
I've been enjoying the kurzgesagt collection of videos[1] which discusses the same phenomena, and how we literally can never travel to large swaths of the universe. [1] ▶ this video
in “The universe has already made almost all the stars it will ever make” · View on HN
shagieAug 2024Cites it
Simply - yes. Furthermore, civilizations that arise in that era of the universe will likely have a different cosmology than what we are able to understand today. If you could only see the galaxy that you are in, you wouldn't be able to see galaxies that were forming shortly after the Big Bang, or be able to use supernovas in other galaxies to measure the scale of the universe. Kurzgesagt did a video on that - TRUE Limits Of Humanity – The Final Border We Will Never Cross ▶ this video
in “The Webb Telescope further deepens the Hubble tension controversy in cosmology” · View on HN
kibwenJan 2023Cites it
> Rather it's that the rate of expansion of the universe is accelerating, so that we're moving away from parts of it faster than its light can cover the distance to us. It will never reach us. It's actually even worse than that. Because of the accelerating expansion of the universe, over time the part of the universe that we can observe will get smaller, allowing us to see less and less of it. Eventually, all that we'll be able to see is our own local group of galaxies, where gravitational attraction will win out over the universe's expansion. However, this won't really be a problem for a few billion years. Relevant Kurzgesagt video: ▶ this video
in “The James Webb Space Telescope is finding too many early galaxies” · View on HN
shagieJan 2023Cites it
That rate is "only" approximately 68 kilometers per second per megaparsec. 68 kps isn't that fast (it's about the same speed as the Helios 2 solar probe) and a mega parsec is big distance (3.2M light years). Its that there's a lot of megaparsecs between here and there and the sum of all of those 68 kps is more than the speed of light. The relevant Kurzgesagt : TRUE Limits Of Humanity – The Final Border We Will Never Cross - ▶ this video
in “The James Webb Space Telescope is finding too many early galaxies” · View on HN
Show 2 more comments
MaursaultOct 2022Cites it
The video doesn't follow the timeline. The video and voice over is still displaying and explaining about white dwarfs after all the stars have burned out, including red dwarves. It looks pretty, but it's incongruous and doesn't fulfill what the title promises in that it doesn't follow its own time lapse. Here's one[1] that actually makes sense in only 9 mins, albeit without the trendy soundtrack. Here's a Kurzgesagt[2] that gets pretty close to the subject. [1] [link] [2] ▶ this video
in “Timelapse of the Future: A Journey to the End of Time [video]” · View on HN
LariscusAug 2021Cites it
You would never reach your destination and at some point you would be stranded in dark space. This kurzgesagt video has some info on this topic.[1] [1] < ▶ this video >
in “How far could a spaceship go if we never ran out of thrust? (2020)” · View on HN