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  • Hey Vsauce, Michael here. If we turned

  • the moon into a giant disco ball

  • day and night would not

  • be a disco party instead of diffusely reflecting sunlight onto

  • all of us a mirror tiled moon would reflect

  • spectacularly you would be lucky to momentarily

  • catch a single reflected beam of sunlight

  • now with the help visuals by Nick from Yeti Dynamics who you should subscribe to

  • immediately let's see what would occur if a disco ball moon actually happened

  • here's the earth with an imaginary screen behind it so we can track the

  • path of reflections

  • from a disco ball moon. It's 3,012 mirror tiles are ten kilometers thick

  • in between one hundred and 150 kilometers

  • across and as you can see the beams of sunlight they

  • reflect would only intersect with earth briefly

  • and rarely a few every month or so would race past at more than 20,000 kilometers a second

  • from the service a Earth they'd just be tiny flashes in the sky

  • 0.1 percent as bright as the regular Sun

  • and would last a fraction of a second. The Earth's Sun and moon just

  • aren't an ideal locations for disco ball effects

  • but if our disco ball moon was closer

  • and orbited earth not 384,000 kilometers away but

  • less than 450 as far as the International Space Station does

  • it would be torn apart by gravitational

  • title forces. Shoot. Also the moon doesn't really

  • rotate from our perspective like a fun disco ball

  • it librates but it's starting to look like instead of an awesome lunar party decoration

  • a disco ball moon would just be a lunar party pooper

  • so for the sake of investigation let's allow this disco ball moon to not be torn apart

  • and allow it to spin in the sky now we're talking

  • occasionally we would get glittery reflections on the dimmer image

  • of the Sun. From the surface of Earth

  • this is what we would see

  • you know being able to see

  • Earth reflected is almost cooler it's like being

  • a bacterium on a giants face who's looking into a mirror

  • you can see the giant but not yourself

  • it kinda makes you feel small

  • but it would be a great way to take planetary selfies

  • so let's watch a mirror the width of the moon orbit as close as the ISS does

  • from the surface of Earth it would look like this

  • the strobe lights around the edge by the way are ten kilometers across

  • pretty cool

  • now finally let's take a look at the moon as a rotating disco ball from low orbit

  • the moon is not a disco ball

  • and likely never will be it's just

  • a diffuse source of illumination but its

  • Illuminating in a different way to imagine what would occur

  • if that actually happened. Woah and as always

  • thanks for watching

  • my

  • in

  • in

  • of

Hey Vsauce, Michael here. If we turned

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月がディスコボールだったら? (What if the Moon was a Disco Ball?)

  • 53 6
    何紹愷 に公開 2021 年 01 月 14 日
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