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  • Hey it's me Destin. Welcome back to Smarter Every Day. Something cool happened on the way home from work today

  • Venus passed in front of the sun. Well, between us and the sun.

  • I guess technically. I had this little camera with me, and I went to the US Space and Rocket

  • Centre, and there were people there from all over, and they had their telescopes and all these

  • different gadgets and gizmos setup so they could see the sun without burning

  • their eyes. It was pretty awesome. And I assume if you're a subscriber to Smarter Every Day you knew

  • about this already and you did that too. So if you would, leave me a video response

  • to this video and tell me or show me better yet, how you did it, so we have all this

  • big compilation of data in one spot. Anyway, so I'll show you what I

  • saw, and then after the fact I'll tell you why the transit of Venus is important.

  • OK so you might laugh at the guy with the welding hood, but he can actually see it better than

  • most people here, so it's pretty smart. See, yep there it is.

  • Pretty cool. -You know, even if you stack like six

  • pairs of sunglasses on top of each other you can't stare at the sun with that -yeah

  • -Because it's got invisible infrared and ultraviolet light that still goes

  • through the glasses. (Destin) That's pretty awesome, did you build this yourself? Are you with the von Braun

  • Astronomical Society? -I am Pretty awesome man. So why are you not looking

  • through your telescope? Why are you letting other people do it? -well

  • I can look through it any time right? These guys don't have

  • one, so it's nice to share. (Destin) Oh yeah, but this is the transit of Venus! -It is.

  • (Destin) The one time you want to use your telescope you're letting other people do it? -That's right.

  • (Destin) That's awesome man. Way to give back. Give us a bump. So you aligned with the

  • sun, the plane that the sun passes across the sky. - Well you're aligning

  • the centre of rotation, with the.. you're making

  • that parallel to the Earth's centre of rotation.

  • And then you rotate your base plate up in the

  • same latitude that we're in, so now this is rotating in one

  • axis, just like the earth. (Destin) That's awesome.

  • (Destin) This is a pretty good shot of you with the Saturn 5 in the background. Makes you look like some kind of space

  • hero. Just letting you know.

  • So usually you have to pick three

  • heavenly bodies right? But this time you only had to do two?

  • It's really just the one. (Destin) It's awesome. Is it OK if I put this up

  • here? -Back a little bit.

  • Oh there we are.

  • So that's it. Can't really

  • see it with this little camera. Oh there it is.

  • There it is. But you're having to track it manually

  • right? But it's pretty easy because of your mount, right?

  • - Well yeah. I'm doing it.. I have another mount I could've, but if anybody kicks it or moves it

  • then I've gotta realign it. It'd take 15 minutes of messing around. This way, hey.

  • It's quick and dirty. The top there is sort of a triangle

  • of sun spots or magnetic storms on the sun.

  • (Destin) Oh that's awesome. They're inspiring the next generation of space explorers.

  • And of course NASA has to one-up everybody and show up with a trailer that you can see a real

  • time display. Solar flares, the whole bit. Just check it out.

  • Oh glare is killing us. You see that?

  • (Destin) Now what are you using here? -I am using a parabolic telescope.

  • -Um. I did this for a project

  • on romanticism, where I was focusing on William Herschel who developed

  • the first parabolic telescopes, using parabolic mirrors. (Destin) Wait a second

  • you're from Alabama though right? -I am from Alabama. Well you're supposed to be a stupid redneck

  • why are you doing this? -Because, I like, I like

  • space. (Destin) You like space? That's awesome. (bystander) By the way, he is a stupid redneck.

  • (Destin) Oh he is a stupid redneck? Just so you know, I do a YouTube show, and

  • -I know, I'm subscribed to you. (Destin)Oh really? - Yes. Nice to meet you Destin. I'm Paul.

  • Nice to meet you Paul. -This is a reflecting telescope,

  • with a F8 lens, focal length of about 48 inches,

  • made out of PVC pipe. I ground the lens myself,

  • found the focal length. (Destin) Wait, what did you grind the lens with, like toothpaste or something?

  • -Basically yeah. It's a silicone oxide,

  • cerium oxide, all kinds of different stuff. (Destin) Can I block your lens for a second? -Go ahead.

  • (Destin) Alright so sunlight's going in, way back down there, I'm getting blind. So just be honest with

  • me. Did you do some kind of fist pump or something when you finally focused it? -Oh I was very happy.

  • -I really did, I fist-pumped. (Destin) Nice. Nice to meet you man.

  • -Can you look yet? -Not really

  • -you can try (Destin) Alright. I saw a guy over there with a piece of PVC

  • I think he's doing better than you guys. -Yeah I know. -He probably is.

  • OK so now that we've talked about how to observe the Venus

  • transit, who cares? Why is it important? Well it's extremely important. So

  • important in fact, in the 1700s Captain Cook left

  • Britain, and he went all the way down, through the Atlantic Ocean, around South America

  • and all the way over here to this little island, called Tahiti.

  • Now the point of Tahiti is that it's latitude was different from Britain, so that you could

  • make the observation from two separate locations and do some calculations.

  • Unfortunately today, we don't have data from a different latitude. -Yeah you do.

  • Who said that? -Destin it's me, Derek.

  • Oh what's up? Where you.. -I'm in your armpit. Oh, there you are.

  • Australia, yeah, the armpit of the world. What's up Derek?

  • -Hey, that's something coming from a guy who lives in Alabama. [laugh]

  • Granted. What's going on? What's up with the shades? -Well

  • I'm still checking out the transit of Venus. It's still happening down here. I want to

  • talk about parallax, and how we can use different latitudes to

  • figure out the distance to the sun. (Destin) Fantastic, so

  • go ahead, you gonna explain it here? -No no, it's too much for this channel.

  • -But uh, if you click on my face, I'll take you to the good stuff.

  • Oh man, this just got awesome. It's like back in Captain Cook's day only we don't have

  • to send a guy years earlier to get somewhere to make the observation,

  • because he's already there via the internet. -On the beard.

  • So go click Derek's face, and we'll learn a little bit about what these observations are for.

  • -On the beard, that's the best part.

  • [laugh]

  • -Alright let's do it. Follow me.

  • Go on! Click his face!

  • Yeah Yeah. Click here.

  • On the beard. [ Captions by Andrew Jackson ]

Hey it's me Destin. Welcome back to Smarter Every Day. Something cool happened on the way home from work today

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金星過境!美國太空與火箭中心 - 每天更聰明 54 (Transit of Venus! US Space & Rocket Center - Smarter Every Day 54)

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    林宜悉 發佈於 2021 年 01 月 14 日
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