Dark Energy, Cosmology, Part 2: Astronomy Crash Course #43

Channel	Publish Date	Thumbnail & View Count	Download Video
	Publish Date not found	0 Views	View on YouTube Download Video

Most of the universe is made up of a mysterious entity that permeates space: dark energy. We don't know exactly what it is, but we do know that dark energy is accelerating the expansion of space. We think this means that the universe will expand forever, even as our view of the universe shrinks as space expands faster and faster.

Check out the Crash Course Astronomy Solar System Poster here: http://store.dftba.com/products/crashcourse-astronomy-poster

If you want to learn more about the creation and death of the universe, watch Crash Course Big History here: https://youtube.com/playlist?list=PL8dPuuaLjXtMczXZUmjb3mZSU1Roxnrey

—
Chapters:
Introduction: The Expanding Universe 00:00
Space expansion is accelerating 2:17
What is dark energy? 4:19
Will the Universe Expand Forever? The Geometry of the Universe 5:20
The cosmic horizon of the observable universe 6:50
Notice 10:20
—
GEOMETRY OF THE UNIVERSE'S RESOURCES
Geometry:
http://abyss.uoregon.edu/~js/cosmo/lectures/lec15.html
http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question35.html

Expanding faster than light:
http://curious.astro.cornell.edu/legal-information/104-the-universe/cosmology-and-the-big-bang/expansion-of-the-universe/616-is-the-universe-expanding-faster-than-the-speed-of-light-intermediate

General extension:
https://en.wikipedia.org/wiki/Metric_expansion_of_space

—

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the Internet?
Facebook – http://www.facebook.com/YouTubeCrashCourse
Twitter – http://www.twitter.com/TheCrashCourse
Tumblr – http://thecrashcourse.tumblr.com
Support CrashCourse on Patreon: http://www.patreon.com/crashcourse

—

PHOTOS/VIDEOS
The Big Bang http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10128 [credit: NASA]
Collision scenario between the Milky Way and the Andromeda galaxy http://www.nasa.gov/images/content/654284main_i1220bw.jpg [credits: NASA; ESA; A. Feild and R. van der Marel, STScI]
Artist's impression of the vampire star http://www.spacetelescope.org/videos/astro_bn/ [credit: ESO/M. Kornmesser]
Galaxies hosting distant supernovae http://www.nasa.gov/sites/default/files/images/593872main_hs-2006-52-a-print.jpg [credit: NASA, ESA and A. Riess (STScl)]
Dark energy expands the universe http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10135 [credit: NASA]
The Expanding Universe http://www.spacetelescope.org/videos/hst15_expanding_universe/ [credit: ESA/Hubble (M. Kornmesser & LL Christensen)]
Hubble Telescope Ultra Deep Field 2014 http://hubblesite.org/newscenter/archive/releases/2014/27/image/a/ [credits: NASA, ESA, H. Teplitz and M. Rafelski (IPAC/Caltech), A. Koekemoer (STScI), R. Windhorst (Arizona State University) and Z. Levay (STScI)]