How Big is the Sun?

SunSize HiRes 1024x723 How Big is the Sun?

The Sun represented as a basketball to show the scale of the Sun and the planets relative to each other. (credit: Courtesy of SOHO)

The Sun is really really big! It is difficult to get a true feel for how big it is because nothing in our daily life comes even close. But we can use objects that we are familiar with to provide us with a scale that can allow us to at least see how big the Sun is compared to the Earth and the other planets in our solar system.  If you think of the Sun as a basketball, the Earth would only be the size of the head of a pin.

  • If the Sun were a hallow ball, it would take about one million Earths to fill it.
  • The Sun is 110 times wider than the Earth. So 110 Earths would fit across the diameter of the Sun.
  • The mass of the Sun (the amount of stuff) is 330,000 times that of the Earth.
  • The mass of the Sun accounts for 99.86% of the total mass (total amount of stuff) in the solar system.
Sun April62011.001.001 300x225 How Big is the Sun?

The Sun observed by SDO on April 6, 2011 in 304 Angstrom light.

EarthVSun April62011.001 300x225 How Big is the Sun?

Zooming in on the 304 Angstrom image of the Sun to show the relative size of the Earth compared to the Sun and to a solar prominence on the Sun's limb.

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About C. Alex Young, Ph.D.

I am a Solar Astrophysicist at NASA Goddard Space Flight Center. I study solar data analysis methods and the impacts of space weather on modern technology. I always enjoy sharing my bit of knowledge about the Sun with my family, friends and the public at large, so I created The Sun Today community. Please ask your questions and join in learning about The Sun!

Comments

  1. Thanks for any informations!

  2. David Starobin says:

    It would be interesting if the comparison of the earth to a pinhead would also include relative distance. How far would that pinhead be from the basketball? I once read that if the sun were a basketball then Jupiter would be the size of a mosquito a mile away. I’m wondering if that is accurate.

  3. Stephen James says:

    IM a freaking moron.

  4. Stephen James says:

    LOL

  5. Oh my fucking god the sun is huge!!!!!!!!!!

  6. Philip Leone says:

    thanks

  7. How far away would the 2mm pinhead (earth) be from the basketball (sun)? I read somewhere 30 meters, but would like to see that calculated. I suck at math.

  8. where the big sun get its conbustion and never ends?

  9. WOW!!!!!!!!! BIG AS THIS IS INPOSSERBALL

  10. Everything that has a beginning has an end, Carlos.

  11. WOW THAT’S

    VERY BIG!!

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