Galaxies, part 1: Crash Course Astronomy #38

Share it with your friends Like

Thanks! Share it with your friends!

Close

The Milky Way is our neighborhood in the universe. It’s a galaxy and there are many others out there. Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular. Galaxies can collide, and grow in size by eating each other.

Crash Course Astronomy Poster: http://store.dftba.com/products/crashcourse-astronomy-poster

Table of Contents
Milky Way is a Galaxy (One of Many) 2:04
Galaxies Have Four Main Shapes 3:18
Galaxies Can Collide 6:05

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
NGC 5363 http://aftar.uaa.alaska.edu/gallery/details.cfm?img=316&type=# [credit: T.A. Rector (University of Alaska Anchorage) and H. Schweiker (WIYN and NOAO/AURA/NSF)]
Panorama of Spiral Galaxy, M31 http://www.noao.edu/image_gallery/html/im1259.html [credit: Local Group Survey Team and T.A. Rector (University of Alaska Anchorage)]
Animation of a variable star http://www.spacetelescope.org/videos/heic1323j/ [credit: NASA, ESA, M. Kornmesser]
Hubble M31 PHAT Mosaic http://hubblesite.org/newscenter/archive/releases/2015/02/image/a/ [credit: NASA, ESA, J. Dalcanton, B.F. Williams, and L.C. Johnson (University of Washington), the PHAT team, and R. Gendler]
Elliptical – Death of giant galaxies spreads from the core https://www.spacetelescope.org/news/heic1508/ [credit: ESA/Hubble & NASA]
Spiral – HUBBLE VIEW OF BARRED SPIRAL GALAXY MESSIER 83 http://sci.esa.int/hubble/53590-hubble-view-of-barred-spiral-galaxy-messier-83/ [credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA). Acknowledgement: William Blair (Johns Hopkins University)]
Peculiar – Colliding galaxies make love, not war https://www.spacetelescope.org/news/heic0615/ [credit: NASA, ESA, and the Hubble Heritage Team STScI/AURA)-ESA/Hubble Collaboration]
Irregular – Little Galaxy Explored http://www.nasa.gov/mission_pages/spitzer/multimedia/asmccaption_prt.htm [credit: NASA/JPL-Caltech/STScI]
Hubble Image of Messier 101 http://hubblesite.org/newscenter/archive/releases/2009/07/image/h/ [credit: NASA, ESA, K. Kuntz (JHU), F. Bresolin (University of Hawaii), J. Trauger (Jet Propulsion Lab), J. Mould (NOAO), Y.-H. Chu (University of Illinois, Urbana), and STScI]
A poster-size image of the beautiful barred spiral galaxy NGC 1300 http://www.spacetelescope.org/images/opo0501a/ [credit: NASA, ESA, and The Hubble Heritage Team STScI/AURA)]
NGC 3344 http://skycenter.arizona.edu/gallery/Galaxies/NGC3344 [credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona]
Flocculent spiral NGC 2841 http://www.spacetelescope.org/news/heic1104/ [credit: NASA, ESA and the Hubble Heritage Team]
Barred Spiral Galaxy NGC1365 https://www.noao.edu/image_gallery/html/im1034.html [credit: SSRO/PROMPT and NOAO/AURA/NSF]
Magnificent Details in a Dusty Spiral Galaxy http://hubblesite.org/newscenter/archive/releases/1999/25/image/a/ [credit: The Hubble Heritage Team]
Panning across Messier 77 http://www.spacetelescope.org/videos/heic1305b/ [credit: NASA, ESA, Digitized Sky Survey 2. Acknowledgement: A. van der Hoeven]
Hubble Mosaic of the Sombrero Galaxy http://www.spacetelescope.org/images/opo0328a/ [credit: NASA/ESA and The Hubble Heritage Team]
Spiral Galaxy NGC 4565 http://www.eso.org/public/images/eso0525a/ [credit: ESO]
M87 (with Jet) http://skycenter.arizona.edu/gallery/Galaxies/M87%28withJet%29 [credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona]
M59, NGC4621 https://www.noao.edu/image_gallery/html/im0579.html [credit: NOAO/AURA/NSF]
Fulldome simulation of colliding galaxies http://www.spacetelescope.org/videos/gal_coll_dome_3800/ [credit: NASA/STScI]
Antennae Galaxies http://www.spacetelescope.org/images/potw1345a/ [credit: ESA/Hubble & NASA]
Terzan 5 Artist’s Concept http://www.sdss3.org/press/images/20111130.fourtails.streams-3.jpg [credit: Amanda Smith, Institute of Astronomy, University of Cambridge]
Interacting Galaxy Pair Arp 87 http://hubblesite.org/newscenter/archive/releases/2007/36/image/a/ [credit: NASA, ESA, and the Hubble Heritage Team]
Doing cartwheels to celebrate the end of an era http://www.spacetelescope.org/images/potw1036a/ [credit: ESA/Hubble & NASA]
Hoag’s Object http://hubblesite.org/newscenter/archive/releases/2002/21/image/a/ [credit: NASA and The Hubble Heritage Team]
Paranal Nights https://www.eso.org/public/images/potw1401a/ [credit: Y. Beletsky (LCO)/ESO]
Tarantula Nebula http://www.eso.org/public/images/eso1023a/ [credit: TRAPPIST/E. Jehin/ESO]
Hubble Ultra Deep Field 2014 http://hubblesite.org/newscenter/archive/releases/2014/27/image/a/ [credit: NASA, ESA]

Comments

ElfianWitch OkeyDokey says:

Can we have a space is weird shirt?

Jordan Riddle says:

this is all hdsnfhdsbkh to me

Lulu, Drinker of Coffee says:

Makes you wonder how people can still think so small.. so narrowly with reality being so infinite.

Giselle Seed says:

One common thought during my studies; the vast distances and lengths of time, the sheer mass of a black hole… all of it so far away and so different from what we are accustomed to, confined to our short life on our tiny planet, all over in the "cosmic blink of an eye", our place so small it is scarcely a single subatomic particle in this grand universe, and every time I think of it I am truly humbled, for I truly cannot conceive of its beauty and depth.

Ohwaitit'snate(and Macie) says:

I think that the ring galaxy is the product of a massive event that pushed away stars into the perfect ring form

randy95023 says:

The Hubble Space Telescope opened us up to distances and accuracy of measurement that the human mind truly cannot comprehend.  Sure, we can parrot distances in the Billions of Light Years but "knowing" is NOT "comprehending".  The human mind cannot even truly comprehend interstellar distances to our "Nearest" neighbors.  That's why our Science Fiction shows and movies use outrageously advanced technology that we can't actually comprehend either.  We will be extinct Millions of years before we reach Star Trek technology.  So cool to think about though!

Klemm Zagala says:

where do newly born star got their hydrogen fuel if the cloud they are came from where exploded stars who were composed of heavier elements?

Abdulrahim Mohamed says:

In my science textbook, it said that the 4 types of galaxies are spiral, elliptical, irregular and lenticular. But in the video, they switched lenticular for peculiar. Which is correct?

Christian Carvajal says:

my favorite thing to do with these videos is to just pause on the faces he makes

Bill Chen says:

Hey what are teh ranges of star ages in a spiral galaxy

Nathaniel Hough says:

i like the animations

schadenfreudebuddha says:

galaxy collisions…this really was a CRASH course!  sorry.

jerry bonenfant says:

i love these crash courses… simplified enough to help explain to my kids too.. thanks

Write a comment

*