Our Galaxy Is a Cannibal
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Sometimes galaxies eat each other! It's actually pretty common. And it turns out that our own galaxy, the Milky Way, is pretty hungry. Annotation: The Great Attractor: https://youtu.be/N9qeOhJ9dbg Thumbnail Credit: NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University) ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, Justin Lentz, David Campos, Chris Peters, Philippe von Bergen, Fatima Iqbal, John Murrin, Linnea Boyev, and Kathy & Tim Philip. ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/SciShow Or help support us by becoming our patron on Patreon: https://www.patreon.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow Sources: http://www.bbc.com/earth/story/20151113-oldest-known-stars-found-at-the-centre-of-milky-way http://www.nasa.gov/mission_pages/hubble/science/hd140283.html https://astronomynow.com/2015/02/28/astronomers-find-newborn-stars-at-the-edge-of-the-galaxy/ http://www.universetoday.com/89086/galactic-cannibalism/ http://astronomy.swin.edu.au/cosmos/h/hierarchical+merging http://astronomyonline.org/Cosmology/GalaxyMergers.asp http://futurism.com/ic-1101-the-largest-galaxy-ever-found/ http://www.space.com/25959-how-many-stars-are-in-the-milky-way.html http://www.space.com/13815-milky-sagittarius-dwarf-galaxy-star-streams.html http://apod.nasa.gov/apod/ap071104.html http://www.universetoday.com/9003/closest-galaxy-discovered/ http://www.icrar.org/home/monster-galaxies-gain-weight-by-eating-smaller-neighbours https://www.sdss3.org/press/20111130.fourtails.php http://www.whillyard.com/science-pages/superclusters.html http://hyperphysics.phy-astr.gsu.edu/hbase/forces/isq.html http://www.cosmotography.com/images/galaxy_cannibalism.html http://www.abc.net.au/science/articles/2014/09/12/4086388.htm http://news.discovery.com/space/astronomy/more-evidence-of-galactic-cannibalism-130225.htm Images: https://en.wikipedia.org/wiki/File:Artist%27s_impression_of_the_Milky_Way_(updated_-_annotated).jpg http://www.nasa.gov/image-feature/active-regions-on-the-sun https://commons.wikimedia.org/wiki/File:Small_magellanic_cloud.jpg https://en.wikipedia.org/wiki/File:Andromeda_Galaxy_(with_h-alpha).jpg http://www.eso.org/public/images/eso0919a/ https://commons.wikimedia.org/wiki/File:5_Local_Galactic_Group_(ELitU).png https://en.wikipedia.org/wiki/File:Messier_87_Hubble_WikiSky.jpg https://commons.wikimedia.org/wiki/File:Cepheus_B.jpg http://photojournal.jpl.nasa.gov/catalog/PIA16216 http://hubblesite.org/newscenter/archive/releases/galaxy/2008/16/image/aa/
Comments
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Do the life on earth could survive the milkdromeda merging ?
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We are too large for Andromeda to eat us. Sure we pull apart other smaller galaxies but the damage done to us is miniscule. When we meet the Andromeda galaxy both of us will get heavily damaged in shape and will mix to become Milkdromeda which would be an elliptical galaxy, not spiral.
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or y'kno... new stars were born replacing the old one
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Baby stars sounds so cute, like awwwww!
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So agar.io lol
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So is our sun originally from another galaxy ?
Or are these "older" stars originally from another galaxy? -
I don't understand: why would a galaxy be expected to have stars of the same age? Regions of space that were rich in gas would form more massive stars. Regions of space that were gas-poor would form smaller stars. The more massive a star, the shorter its life (right?). The massive star dies and flings its gas out which then coalesces into new (young) stars, some large, some small, with corresponding lifetimes. After a while the ages are all mixed up into a variety of young and old stars. Why is a new theory needed? What did I miss?
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Agar io Galaxies next.
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so, basically, the universe is a gigantic fucked up agar.io?
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So full of shit
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Just to clear something up, to my understanding the Andromeda galaxy will merge with the Milky Way, not consume it. It will then become the unoriginal name, "Milkdromeda". In fact, if the human race is still around during that time period, we will be mostly unaffected by the merger simply because the distances between systems are so great. I only say this because you point out the difference between galactic cannibalism and a general merge.
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One day, Milky Way and Andromeda would merge to make Milkdromeda in agar.io.
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LOL, was typing "It's a dog eat dog...." then he said it so the comment feels a bit redundant now
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So... the universe is a big agar.io game
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So....when 2 galaxies "merge", then, what happens when 2 black holes "merge"?
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If the universe is expanding from a single point, shouldn't all galaxies move away from each others? Why do they even meet?
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So THAT'S why we haven't found other life out there yet, by the time they're close enough to detect, we're eating them?
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better than sex ed lol
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talking about the age of the star seems a bit odd, since there don't seem to be any first generation stars left and all the stars we have observed have formed in the nebulae made by an earlier star's supernova
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I wish he mentioned the star formation that's triggered by galactic mergers and cannibalism
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