how-many-stars-are-there

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Interactive video lesson plan for: How Many Stars Are There?

Activity overview:

Counting stars from the shore of the cosmic ocean…
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↓ More info and sources below ↓

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How many stars are there in the universe? Are there more stars out there than grains of sand on Earth? Thanks to advanced space telescopes, we've been able to peer farther into deep time and the distant universe than we ever thought possible, and we might finally be able to answer these mind-boggling questions
Every star visible from Earth (naked eye): http://en.wikipedia.org/wiki/Bright_Star_Catalogue
Number of stars in the universe (estimated): http://www.universetoday.com/102630/how-many-stars-are-there-in-the-universe/
Hubble gigapixel image of Andromeda: http://www.spacetelescope.org/images/heic1502a/
Hubble eXtreme Deep Field: http://xdf.ucolick.org/
How big is the sky? http://www.badastronomy.com/bitesize/bigsky.html
How much sand is there on Earth? http://www.hawaii.edu/suremath/jsand.html
What would the cosmic sandbox look like? https://what-if.xkcd.com/83/

Carl Sagan's Cosmos: "The Shore of the Cosmic Ocean": https://www.youtube.com/watch?v=Pa1ImgOcOPM


Have an idea for an episode or an amazing science question you want answered? Leave a comment below!
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It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.DFollow me on Twitter: @jtotheizzoe
Email me: itsokaytobesmart AT gmail DOT com
Facebook: http://www.facebook.com/itsokaytobesmart
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For more awesome science, check out: http://www.itsokaytobesmart.com
Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios

Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Andrew Matthews - Editing/Motion Graphics/Animation
Katie Graham - Director of Photography
John Knudsen - Gaffer
Dalton Allen - Post-Production Intern

Theme music:
"Ouroboros" by Kevin MacLeod

Other music via APM

Stock images from Shutterstock

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Last week's video:
What Color Is The Universe https://www.youtube.com/watch?v=ibVofIHq71s

More videos:
Why Does February Have 28 Days? https://www.youtube.com/watch?v=AgKaHTh-_Gs
Why Vaccines Work https://www.youtube.com/watch?v=3aNhzLUL2ys
Why Are Some People Left-Handed? https://www.youtube.com/watch?v=NPvMUpcxPSA
Where Does the Smell of Rain Come From? https://www.youtube.com/watch?v=lGcE5x8s0B8

Tagged under: science, stars universe,pbs digital studios,joe hanson,' smart, smart,' smart, smart,Star (Literature Subject),Astronomy (Field Of Study),stars,space,andromeda,gigapixels,carl sagan,grains sand,Hubble Space Telescope (Satellite),nasa,extreme deep field,xdf,galaxy,milky ,scishow,vsauce,veritasium,minutephysics,asapscience

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