Quiz

BuzzFeed Staff, UK 

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Learnt a thing or two while watching the solar eclipse on Friday? Prove it here.

Learnt a thing or two while watching the solar eclipse on Friday? Prove it here.

The Hardest Quiz About The Sun You'll Take Today

It's the solar corona – it's atmosphere – that's the hottest, weirdly. Scientists don't [100% know why](http://www.scientificamerican.com/article/why-is-the-suns-corona-th/).

Which part of the sun is hotter?

If you don't melt them, it'd be just under [one million](http://www.suntrek.org/sun-as-a-star/sun-and-earth/comparing-size-sun-and-earth.shtml), with all the gaps between the Earths.

How many Earths could fit inside the sun?

This paper puts it at [170,000 years](http://adsabs.harvard.edu/full/1992ApJ...401..759M) for the average photon to escape the sun.

How long does it take a photon to get out from the centre of the sun?

Basically, Earth and all the other planets are [insignificant](http://www.bbc.co.uk/science/space/solarsystem/sun_and_planets/sun) next to it.

What proportion of the solar system does the sun make up, by mass?

He did it in [1612](http://galileo.rice.edu/sci/observations/sunspot_drawings.html)!

Who drew this diagram of sunspots?

That's [why](http://www.crh.noaa.gov/fsd/?n=sunspots) they look dark.

Are sunspots hotter or cooler than the rest of the sun's surface?

It's [#fff5f2](http://www.vendian.org/mncharity/dir3/starcolor/) to be precise. Here's [why](http://www.universetoday.com/18689/color-of-the-sun/) it looks yellow to us (it's to do with scattering in the atmosphere).

What colour is the sun as viewed outside of our atmosphere?

It formed along with the solar system around [4.5 billion years ago](http://www.suntrek.org/sun-as-a-star/suns-vital-statistics/how-old-sun.shtml).

When did the sun form?

When it's around [7 billion years old](http://www.suntrek.org/sun-as-a-star/suns-vital-statistics/how-old-sun.shtml), the sun's going to start expanding. When it reaches around 10 billion years old it'll have become a red giant whose atmosphere will reach almost as far as where Earth is right now. Eek.

How long until the sun is a red giant?

What part of the sun is visible during a total eclipse?

[This NASA diagram](http://www.nasa.gov/mission_pages/iris/multimedia/layerzoo.html) reveals all.

Which is the correct order for the inner layers of the sun?

Check [this NASA diagram](http://www.nasa.gov/mission_pages/iris/multimedia/layerzoo.html) again for the outer layers too.

Which is the correct order for the outer layers of the sun?

Although the equator rotates faster than the poles, on average the sun rotates roughly once [every 27 days](http://solarscience.msfc.nasa.gov/sunturn.shtml).

How long does the sun take to make one rotation on average?

That's [2 x 1024 kg](http://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html).

How many times more massive than Earth is the sun?

It's a [G](http://hyperphysics.phy-astr.gsu.edu/hbase/starlog/staspe.html) – which means it had a temperature of around 6000 Kelvin.

What type of star is the sun?

Wow, you either really know your stuff or are good at guessing. Well done!

Amazing!

You know some stuff about the sun! Not, like, everything, but that's fine, because nobody expects you to know everything.

Not bad!

That wasn't great. You would have probably done better if you just guessed at random – maybe try that next time.

Oh dear!

The sun's atmosphere is hotter than its surface. An earlier version of this quiz said that the sun's atmosphere was hotter than its core, which it clearly is not. You can all add one point to your scores, sorry!

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The Hardest Quiz About The Sun You'll Take Today

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The Hardest Quiz About The Sun You'll Take Today

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