Of the total radiation from the sun, only half a billionth reaches the earth.
How hot is the sun?
The temperature on the surface of the sun is a modest 5800 degrees, while the interior of the sun is 15 million degrees.
Letters and stars
If you built a bookshelf from the ground to the sun, 1000 stories high, and filled it with books, the number of letters would equal the number of stars we know today.