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Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the universe began – with a bang.
Crash Course Astronomy Poster: http://store.dftba.com/products/crashcourse-astronomy-poster
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Table of Contents
Distant Galaxies Show a Red Shift in Their Spectra 2:07
The Universe is Expanding 2:51
This Model is Called “The Big Bang” 5:12
The Universe is Almost 14 Billion Years Old 11:43
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PHOTOS/VIDEOS
Hubble Goes to the eXtreme to Assemble Farthest-Ever View of the Universe http://www.nasa.gov/mission_pages/hubble/science/xdf.html [credit: NASA; ESA; G. Illingworth, D. Magee, and P. Oesch, University of California, Santa Cruz; R. Bouwens, Leiden University; and the HUDF09 Team]
Out of this whirl: The Whirlpool Galaxy (M51) and companion galaxy http://www.spacetelescope.org/images/heic0506a/ [credit: NASA, ESA, S. Beckwith (STScI), and The Hubble Heritage Team STScI/AURA)]
Red-Shifts in the Spectra of Extra-glactic Nebuale http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1936ApJ….83…10H&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf [credit: American Astronomical Society, NASA Astrophysics Data System]
Andromeda http://www.nasa.gov/images/content/386910main_M31_optical_wide.jpg [credit: Bill Schoening, Vanessa Harvey/REU program/NOAO/AURA/NSF]
The Big Bang (video) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10128 [credit: NASA]
The Sun https://www.nasa.gov/sites/default/files/706436main_20121114-304-193blend_m6-orig_full.jpg [credit: NASA/SDO]
Alpha Centauri http://www.eso.org/public/images/eso1241e/ [credit: ESO/Digitized Sky Survey 2, Acknowledgement: Davide De Martin]
Andromeda https://en.wikipedia.org/wiki/Andromeda_Galaxy#/media/File:Andromeda_galaxy_2.jpg [credit: NASA/JPL-Caltech]
Friedmann Universes https://commons.wikimedia.org/wiki/File:Friedmann_universes.svg
Friedmann Equation http://burro.astr.cwru.edu/Academics/Astr328/Notes/Expansion/friedmann.html
Penzias and Wilson stand at the 15 meter Holmdel Horn Antenna that brought their most notable discovery. https://en.wikipedia.org/wiki/Arno_Allan_Penzias#/media/File:Horn_Antenna-in_Holmdel,_New_Jersey.jpeg [credit: NASA]
Planck CMB http://www.esa.int/spaceinimages/Images/2013/03/Planck_CMB [credit: ESA and the Planck Collaboration]
Galaxy Superclusters http://irfu.cea.fr/Projets/coast_documents/images_MareNostrum/SDvision-MN00097-hires-01-mymix-a0_075.jpg [credit: Marenostrum Numerical Cosmology Project]
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If the space is what is actually expanding, and the galaxies are not actually moving, then does that mean that we are technically still inside the "explosion" of the Big Bang?
Anyone else get these weird moments where you suddenly realise you're actually alive and you're like "WHAT THE FUCK IS ALL THIS?????" I get that a lot lately….
This was uploaded yesterday. Perfect timing for my final. Thank you.
the funny thing is that intelligent people always stay in doubt. whereas dumbass religious people always try to shout on top of their lungs claiming their religion to be correct!
The flying spaghetti monster gag was fukin priceless.
''there is nothing for the universe to expand into ect''
no, we have no knowledge of anything outside our universe, doesn't mean there is something.
saying there is nothing, is as truthful as saying ''beyond the edge of the universe there will be bananas and chocolate''
don't say something is a fact when it's unproven.
say it more like ''it is unanimously believed that there is nothing beyond our universe''
otherwise you're spreading misinformation.
My astronomy professor used to explain the expansion of space this way: imagine you're baking a blueberry muffin. When you add the batter with the blueberries in the cupcake liners, the blueberries are in certain places. After baking, because the batter has cooked and expanded, the blueberries have also moved with it, but only because the batter took them along for the ride.
Oh, the flame war about the existence of everything… Shouldn't we focus on learning more instead of feeding that stupid flame?
Great video though, and it being the #42 of the series man… just pure awesomeness!
13.82 Gigayears!
Does this mean that the space inside us is expanding as well? So we're basically giants compared to before? :D
So I have a question: People often say there is no centre to the universe. However, do they mean "our" visible universe or the universe in its entirety (other dimension and all). Why I ask is because if our 3 dimension "reality" exists as a hologram on the outside of a "bubble" universe then indeed there is no "centre" to it. However, technically there is "core". Being able to perceive the other dimensions we would be able to look inward. If you imagine 2D perceiving people in a universe where people lived on the outside of a 3D universe, there would be no up and down, to them the universe has no centre because it is infinitely flat. HOWEVER, if they could some how look down or go down then they could. Hence our down and centre may be the "big bang" it self. That would be the centre of our universe because if we were to go to that centre the universe would be just forming and time would be a dimension.
I hope my question is clear.
Not all observable galaxies are moving away from us. Just the ones far enough away for gravity to be unimportant.
…no explanation of what it actually was?
Unless it's a quantum simulation!
I'm going to miss this show
also, the big bang is when time began so scientifically speaking you can't say "before the big bang" because that's when time began existing
What are the names of the equations listed in the video?
I've been brain-fucked again!
Lol. Flying Spaghetti Monster cameo.
It was distasteful to mock religion (With the spaghetti monster). Just leave religion out of it and talk about science. They are 2 different things, no need to mock one or the other.
Got it: no center, but a start time, pretty simple. ( just kidding, great as always!)
How can we determine the difference between past speed and current speed of a faraway galaxy? In other words, the way this is being explained, it seems like you could interpret the redshift findings to mean that distant galaxies (which we see in the past) had BEEN moving away from us faster than close galaxies. How has it been determined that those distant galaxies are still currently moving at that speed? I think there must be something in how redshifted light is detected that I don't understand, if someone cares to explain.
One day I will find a science video about this stuff that doesn't take a jab at religion and just focuses on teaching the subject at hand.
I get it, and I know, religion is bad for progress yadda yadda whatever I don't care. I just want to learn, not be part of your weird crusade against people who want to be willingly ignorant. Thanks. Keep your garbage to yourselves and focus on actually teaching next time.
What a lie, unbelievable, I suppose I will be obligated to ignore this mini series.