lovely floral chair that he sit in for 3 hours

for the prime numbers video and boy it really formed to his body

It still has his musk. It's lovely.

May I ask you a favor? Thank you. Here's two photos of me.

canyouspotthedifference.com

That game is a lot more difficult because those pictures of me that you just saw are

in two completely different locations, I'm not wearing the same outfit, and also one of them isn't me.

But spotsthedifference.com is a DONG, something you can do online now guys.

On stargazing you're given a map pinned with the best places to see the night

sky.

Each of these red stars has been designated as a good place to do so and clicking on one

gives you the information you need to check it out.

Some are observatories while others are just places where stars are more visible, like

Hatteras Island.

If Hatteras island is too far away just stargaze with

Online Planetarium where you can choose a location to view constellations from.

Granted, they aren't real photographs of stars but the benefit is you get to adjust

factors to your liking.

This includes time, date, and something called limiting magnitude.

For the naked eye this refers to the faintest stars that can be seen without the use of

tools like telescopes or cameras.

Now there are 88 official constellations

and the brightest ones are in the northern hemisphere.

The ones in the southern hemisphere are difficult to see just with the naked eye.

Each constellation has an alpha star which is the brightest out of the all the ones that

make it up.

For example, Delta Capricorni is the alpha star of Capricornus with an apparent magnitude

of 3.58.

There are factors that impair our ability to see the stars like higher humidity

and lower altitudes but the biggest factor of all is light pollution.

And to learn more about light pollution head to

Globeatnight.org.

The dots are color-coded based on limiting magnitude.

The higher it is the more light pollution there is and consequently less visibility.

To understand how light pollution can affect our ability to see here's a nifty little

infographic.

Obviously some light is necessary and that's this zone here but when it goes beyond what

it's supposed to light up it ultimately brightens the sky.

It not only harms this guy's “freakin' eyeballs” but it can affect other animals,

especially if they're nocturnal.

While predators use light to hunt species, their prey use darkness to cover up.

Light pollution also causes something called

Skyglow.

When the light on Earth reflects into the sky some of it escapes into space, but the

rest is scattered by molecules in the atmosphere.

This makes it more difficult to see the stars.

This is a beautiful scrolling experience and you'll learn skyglow facts along the way.

You can also interact with this map by scrolling from 1992-2025.

The site will also tell you the brightness by area in the year 2014.

A lumen is a measure of the total quantity of visible light emitted by a source.

Now Skyglow is thought to have a negative impact on people's health by contributing

to certain sleep disorders.

This can be because light can affect our melatonin levels which are responsible for when we sleep

and wake up.

Lack of sleep can be responsible for things like insomnia, depression, cardiovascular disease, and more.

It's hard to imagine a world without light pollution but there is a simulator just for that.

Light pollution is measured on the Bortle Scale which goes from 1 to 9.

Sliding it all the way to the left shows you the darkest skies.

Inner cities often measure a 9 and it makes stargazing much more difficult.

Of course this is a very simplistic simulation to demonstrate the effect of light pollution.

If you want to see what your home measures on the Bortle Scale there are maps for that.

This page gives you the key and then select from the maps down here.

In North America there's quite a bit of light pollution but not many areas where it's

a 9 on the scale.

Now let's go from light pollution to

Virtual Lighting Studio.

This is a great website for photographers or filmmakers and I actually really appreciate it.

You can choose among different kinds of lighting equipment to plan for a real life shoot!

Check out this handsome fella.

Click here to select the type of light you want to use like a ring light.

And ring lights are used by a lot of youtube creators.

It brightens the eyes while emitting soft enough light to decrease shadows.

And it's fun to play around with the position of the lighting.

Well, it's fun until you get to THIS.

You can adjust the intensity of the light you can add different color gels to it if you want to change the color temperature.

And you can even add multiple lights to your lighting setup and adjust their positions to get the look that you want.

Once you get the right lighting let's move from photographs to

Paintings.

Google Arts and Culture experiments have collected a plethora of art pieces from museums and

archives around the world.

Art Palette analyzed thousands of pieces and calculated their color palettes.

This site is cool because you can find art pieces by adjusting five different colors

to your liking.

It's curious to see what you can get because sometimes what would seem like a garish

color combination actually creates some awesome art.

If you want to see what pieces share a color scheme with something you created or photographed

you can do that right here.

And that's enough visual art so let's go to audio art with

RaveDJ where you can mashup any two youtube videos you like.

Let's try M83's Midnight City and the Barney Theme Song.

Oh yeah that's great what a work of art.

And if for some reason people don't like the music that you make well just take it away with you on

Island you created on “Draw Your Island.”

First draw yourself.

Wow that looks exactly like me.

Now I'm gonna draw my best friend aka Michael Stevens, a campfire, smoke, and a pet taco.

And a fish I guess.

The list goes on but look at my island. Yay!

If you enjoyed these DONGs and you want to keep learning about the night sky then I would highly recommend checking out

the Astronomy course on Brilliant.org who was nice enough to sponsor this video and

Brilliant lines up really beautifully with what we're trying to do here at vsauce. They offer courses in science, math, problem-solving, and Astronomy.

So one such course is the Life Cycle of Stars.

It goes through star formation, stellar evolution, and black holes.

If you want to check out brilliant the first 36 people to click on that link at the top of the description

will get 20% off a premium annual subscription and they are lovely human beings over at brilliant and I'm really appreciative of them supporting Vsauce.

And also this chair. I get why Michael

likes this chair. It's very comfortable. You kind of just sink in a little bit.

Scooched. Ya know it's very nice. Also

fun fact about that prime number video.

Michael actually did it for 6 hours. We filmed it once

There was a problem. So then Michael and I came in on Saturday

and filmed it again so that is really good on you

Michael I'm very proud of you and if you want to tell Michael how proud you are

You can go follow his personal Twitter that not that many people I don't think really know about.

It's @I'mnotMichaelStevensJakePleaseDon'tEverPutThisInaVideoThatWouldTerrible.

That's his handle. Go let him know

that you really love him and appreciate all the DONGs that he brings into the world.

And I'm gonna go take off this sweater and beanie because I miscalculated how hot it would be today.

Especially in this hot studio. With all these hot lights. I'm gonna stop speaking. And as always, thanks for watching.