Chunks of the Universe Keep Disappearing (into the Unobservable Universe)
Light from other parts of the universe only comes from a portion called the observable universe. Most of the universe is out of reach of our eyes and our telescopes. This is the unobservable universe. The observable universe is just a small fraction of the total universe. Some regions of space are moving away from us faster than the speed of light, which means the observable universe is shrinking in size. Because the expansion of the Universe is accelerating, each year, more and more regions of space cross the point of no return and become unobservable to us.
#astronomy #cosmology #space
Interesting Astronomy and Space Books:
Extraterrestrial: The First Sign of Intelligent Life Beyond Earth
by Avi Loeb: https://tinyurl.com/3r79s6na
Confessions of an Alien Hunter: A Scientist's Search for Extraterrestrial Intelligence by Seth Shostak: https://tinyurl.com/5n6frts7
* Buying through these Amazon affiliate links doesn't cost you anything extra, but it helps to support this channel.
Fair Use Disclaimer:
- Copyright Disclaimer under Section 107 of the Copyright Act of 1976, allowance is made for ‘fair use' for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research.
Video Credits:
https://commons.wikimedia.org/wiki/File:Orion_Nebula_3D_Fly-Through_-_HST.ogv
Credit: NASA, ESA, F. Summers, G. Bacon, L. Frattare, Z. Levay, and K. Litaker (STScI)
https://commons.wikimedia.org/wiki/File:Zooming_in_on_Messier_66_galaxy.ogv
Credit: ESA/Hubble
Earth and Moon Size and Distance scale: https://www.youtube.com/watch?v=_61SxDrdyhI
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