The Moon Illusion

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Published 2012-10-24
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"Look how big the moon is!" you've shouted before. But what if I told you that the moon never really changes size, and it's simply your brain playing a trick? Find out what The Moon Illusion is, and why it happens!

Written and created by Mitchell Moffit (twitter @mitchellmoffit) and Gregory Brown (twitter @whalewatchmeplz).

TWITTER: www.twitter.com/AsapSCIENCE
FACEBOOK: www.facebook.com/AsapSCIENCE

Music by Mitchell Moffit
www.mitchellmoffit.com/
www.twitter.com/mitchellmoffit
www.facebook.com/mitchellmoffit

Art by Gregory and Mitchell
www.gregorybrownart.tumblr.com/
www.twitter.com/whalewatchmeplz

Some Sources---

1) psycnet.apa.org/psycinfo/1963-02291-001
2) retina.anatomy.upenn.edu/~bart/scriptie.html
3) bit.ly/Tw4Dkv

All Comments (21)
  • @AsapSCIENCE
    Hello Science Lovers! We love Vsauce and the whole YouTube Science Community :) - Glad and grateful to have the new subscribers. Welcome!
  • @danieldamineli
    Burning question: Why do tissues (and other material as some types of rock) appear darker when wet?
  • @adsonkool
    Thank You Vsauce !!! i love it how all the science channels link up and help each other KEEP IT UP
  • @Kumquat_Lord
    The Moon Illusion is a fantastic name for a band
  • @ChrisCucinell
    You mean the moon doesn't change size? It never goes on a diet? What a revelation.
  • As an artist, this video gave some insight to the techniques used when drawing things large scale, and putting something nearby like a house for a visual reference that gives the viewer a scope of scale. This moon illusion seems like a perfect real life example of the illusion artists use to create a sense of scale in their paintings. A moon closer to horizon is closer to those buildings, but since those objects are put into perspective and perceived as 'closer' then the illusion is triggered.
  • Actually we just has a Super Moon a couple weeks ago so the Moon actually was closer than normal.
  • @marrela97
    This makes me think about the "moon following my car" when I was younger, could you please explain that, because I still don't get it 😂
  • @RaiderNic99
    I've tried explaining this to people before and no one ever believes me.
  • @soccerchic7ful
    This was much easier to understand than some of the articles I read online. Really helpful. Thank you so much. :)
  • @Chaos3131
    Thanks Vsauce for introducing me to this channel. Thanks AsapSCIENCE for increasing my knowledge even further
  • Actually, at sea level the moon appears 12% smaller in apogee than perigee because of the 50 Mm difference in distance, so a not completely correct general statement :)
  • @Alalias
    Topic for a future video: When I look at a coin under a microscope (with extra illumination from above), the lettering and other features often appear concave, as if it were dipping below the surface rather than raised above it as it actually is. I can usually get the letters to pop out so that I perceive it correctly but sometimes that takes tremendous effort, and yet occasionally I'll see it correctly right away. When I'm perceiving it the wrong way, it really really looks like everything is indented. If I move the light source, the reflections and shadows change as if the light really were falling on a concave surface.
  • @cr1490
    So many of your videos are relevant to my psychology class!
  • @TaiFerret
    The moon is actually much larger than we see it. I think the best way to really appreciate the size of the moon is by actually going there. The next best thing is trying to imagine standing on the moon.
  • @LoLo180499
    This may sound weird but here's my question (I've posted it to Vsauce too) if you took into account the size of everything on the universe, and how many there are of everything, what is the average size for a thing? I know it would be a REALLY hard question to answer but if you could get any info on stuff like this, I dunno, it would just be really interesting :)
  • @kkmonlee
    The air has a mass and a density just like everything else. As light passes through cold air,and then to hot air, the density changes slightly slowing or speeding up the velocity of the light passing through. This is what creates the waves you see on hot days.
  • @Avarant
    There's a very interesting effect very similar to this if you drive south on I-5 through Sacramento CA. There is a building on the horizon that shrinks as you get closer and the horizon is filled in.