Turns out, the diameter of the Earth is about 8,000 miles. The Sun's is a little bigger than 800,000 miles ... but it's 93 million miles way.
What if Rigel was our sun instead. Its diameter is about 53,000,000 miles. NEE (as in the knights who say "nee". )
So if it were centered at the same place as the sun, its surface would reach about 1/4th of the distance to the earth. needless to say, we'd be toast. And Rigel isn't even CLOSE to being the biggest star.
Here are some pics to help you capisky.



Here are the diameters:
Got the pics from here:
FYI -- the star named "Betelgeuse" -- is pronounced "Beetle-juice".
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