What If You Travel in a Straight Line Forever?

The video “What If You Travel in a Straight Line Forever?” explores the intriguing question of whether the universe is finite or infinite and what would happen if one traveled in a straight line indefinitely. It begins by discussing the observable universe, which extends about 46 billion light-years in all directions, filled with stars and galaxies. The video then delves into the concept of a hypertorus model of the universe, where traveling in a straight line could eventually bring you back to your starting point, similar to how traveling in one direction on Earth eventually loops back.

The key idea is that the universe might be closed and curved, meaning it could loop back on itself. This is contrasted with the notion of an infinite universe that extends forever. The video explains that our understanding is limited by the speed of light and the time since the Big Bang, which restricts what we can observe. It also touches on the expanding universe, which complicates the idea of traveling in a straight line forever.

The video concludes by addressing the mind-boggling nature of space and time, suggesting that while it might seem possible to travel forever in a straight line, the true nature of the universe could mean you would eventually return to your starting point, much like a cosmic game of asteroids. This exploration highlights the fascinating and complex nature of our universe and the ongoing quest to understand its true shape and extent.

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#AHDocumentary #Universe #Einstein #GeneralRelativity

OUTLINE:

00:00:00 What Happens If You Travel in a Straight Line Forever?
00:00:52 The Cosmic Time Machine
00:02:35 The Infinite Loop of the Torus Universe
00:03:50 The Duality of Infinite and Finite Universes
00:04:58 The Reality of the Observable Universe
00:05:53 The Cosmic Horizon and Beyond
00:07:14 The Unseen Realms and Multiverse Theories

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[CIAVERMONT]

Interesting choice of B-Roll used for this video.

[diGritz]

Our entire planet travels in a straight line. It's just that it's doing so in curved space.

[apollo-rz]

The James Webb telescope has discovered some galaxies that appear to be older than the universe, it would seem that the only way that this would be possible is that this older galaxy was in fact light from the initial primordial universe that has come full circle, and that its image is a mirror image of our own universe in its inception.

[pinchopaxtonsgreatestminds]

We are inside an ultra-massive black hole so in reality if you travelled in a straight line forever you would leave the black hole, and enter a universe that holds the black hole that we are inside, a much, .bigger universe. Or if you head in a straight line towards Sagittarius A then you end up in a much smaller universe where people are wondering what would happen if they travelled in a straight line into our universe.

[henniegrobler]

Where dit the material come from that caused the "big bang" ?