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The Hardest Quiz About The Sun You'll Take Today

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

Posted on

Ready? Let's go...

NASA SDO / Via digg.tumblr.com
  1. 1. Which part of the sun is hotter?

    Correct
    Incorrect
    It's atmosphere
    Correct
    Incorrect
    The surface
    Correct!
    Wrong!

    It's the solar corona – it's atmosphere – that's the hottest, weirdly. Scientists don't 100% know why.

  2. 2. How many Earths could fit inside the sun?

    (If you melted down the Earths.)

    Correct
    Incorrect
    13 million
    Correct
    Incorrect
    1.3 million
    Correct!
    Wrong!

    If you don't melt them, it'd be just under one million, with all the gaps between the Earths.

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

    Correct
    Incorrect
    A few seconds.
    Correct
    Incorrect
    Thousands of years.
    Correct!
    Wrong!

    This paper puts it at 170,000 years for the average photon to escape the sun.

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

    Correct
    Incorrect
    99%
    Correct
    Incorrect
    90%
    Correct!
    Wrong!

    Basically, Earth and all the other planets are insignificant next to it.

  5. 5. Who drew this diagram of sunspots?

    Correct
    Incorrect
    Galileo Galilei
    Correct
    Incorrect
    Isaac Newton
    Correct!
    Wrong!

    He did it in 1612!

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

    Correct
    Incorrect
    Hotter
    Correct
    Incorrect
    Cooler
    Correct!
    Wrong!

    That's why they look dark.

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

    Correct
    Incorrect
    White
    Correct
    Incorrect
    Yellow
    Correct!
    Wrong!

    It's #fff5f2 to be precise. Here's why it looks yellow to us (it's to do with scattering in the atmosphere).

  8. 8. When did the sun form?

    Correct
    Incorrect
    4.5 billion years ago
    Correct
    Incorrect
    6.5 billion years ago
    Correct!
    Wrong!

    It formed along with the solar system around 4.5 billion years ago.

  9. 9. How long until the sun is a red giant?

    Correct
    Incorrect
    1 billion years
    Correct
    Incorrect
    4.5 billion years
    Correct!
    Wrong!

    When it's around 7 billion years old, 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.

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

    Correct
    Incorrect
    Corona
    Correct
    Incorrect
    Chromosphere
  11. 11. Which is the correct order for the inner layers of the sun?

    Correct
    Incorrect
    Core, Convection Zone, Radiative Zone .
    Correct
    Incorrect
    Core, Radiative Zone, Convection Zone.
    Correct!
    Wrong!

    This NASA diagram reveals all.

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

    Correct
    Incorrect
    Transition Region, Photosphere, Chromosphere, Corona.
    Correct
    Incorrect
    Photosphere, Chromosphere, Transition Region, Corona.
    Correct!
    Wrong!

    Check this NASA diagram again for the outer layers too.

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

    Correct
    Incorrect
    27 days
    Correct
    Incorrect
    72 days
    Correct!
    Wrong!

    Although the equator rotates faster than the poles, on average the sun rotates roughly once every 27 days.

  14. 14. How many times more massive than Earth is the sun?

    Correct
    Incorrect
    3,330
    Correct
    Incorrect
    333,000
    Correct!
    Wrong!

    That's 2 x 1024 kg.

  15. 15. What type of star is the sun?

    Correct
    Incorrect
    A G-type main sequence star
    Correct
    Incorrect
    A K-type main sequence star
    Correct!
    Wrong!

    It's a G – which means it had a temperature of around 6000 Kelvin.

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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