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Duration:15:17
Uploaded:2017-07-06
Last sync:2017-07-06 17:10
We're enjoying the summer here in Montana, and to help celebrate we thought we'd put together a compilation of our favorite sun-related episodes from our past. Don't worry, you won't need sunglasses for this one!

SciShow Beach Towel: https://store.dftba.com/products/scishow-beach-towel

Sun VS. Atomic Bomb 0:26
What Causes Sunburns? 3:40
Why Do Things Fade in the Sun? 5:57
The Science of Sunbeams 7:50
Solar Storms 11:27

Hosted by: Olivia Gordon
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It's summertime here at the SciShow studio so, naturally, we're thinking about the science of the sun. Hank's hosted a lot of episodes over the years about our most important star so, I thought I'd share some of my favourites.

First up, the sun is pretty hot and powerful, but how does it compare to an atomic bomb?

Hank: The sun is awesome. Whatever it is you're doing right now, you're  only able to do because of the sun. Because the sun gives us it's heat and it's light, which, uh, makes photosynthesis happen, which makes all the food that you eat.


So, you might as well know how it works. The sun is really nothing more than a giant, massive nuclear explosion that just keeps on exploding, and exploding, and exploding, and exlpoding.

So, the sun was formed about 4.5 billion years ago, the same way that all other stars form. There was a bunch of gas in the universe, and some of the gas started clumping together because of gravity.

The more that that gas clumped together, the more gas wanted to be there, and it clumped together so hard that eventually two atoms of Hydrogen fused together into Helium, producing a huge amount of energy. And that started off a chain reaction that became the power of our sun.

So, now, at its core where all the, you know, real interesting action happens, uh, the temperature there is about 27 million degrees Farenheit.

From there it takes about 170 thousand years for that energy to reach the surface of the sun. And by that time it's cooled to a (?~1:30) 10 thousand degrees.

Often you'll hear people say "We're gonna make this as hot as the surface of the sun!" And it's important to know, the surface of the sun, not that hot compared to 27 million degrees.

Other examples of Hydrogen fusion that you're probably familiar with and do not occur on the sun, include the "Tsar Bomba", the most powerful nuclear weapon ever detonated.

It was detonated in the Soviet Union in 1961. And the way that fusion bombs work is they actually have, basically, a bunch of fusion bombs going on at once to create enough pressure to make the Hydrogen atoms fuse.

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