How Big is the SUN?
Using a Tube to Measure the Sun
The Sun is 875,000 miles across, though scientists usually use kilometers, in which case it is 1,392,000 kilometers across. It is also very heavy. To write its weight in kilograms (1kg = 2 pounds, more or less) you write 2 followed by 30 zeros!
Sarah Gibson
how much does the sun weigh?
The Sun is about 2,000,000,000,000,000,000,000,000,000,000 kg (a 2 with 30 zeros kg, or about 4.4 with 30 zeros lbs). Maybe you learned in your physics class what's the difference between weight and mass. For example a person of 50 kg weighs 50 kg on Earth, 8.3 on the moon, and 1354 on the Sun.
Mandy Hagenaar
How big around is the Sun?
The radius of the Sun is about 700,000 km (435,000 miles). As you know the circumference of a circle is 2 pi r, where r is the radius. That makes 4.4 million kilometers (2.7 million miles) for the circumference. For comparison, the circumference of the Earth is about 40,000 km (25,000 miles), about 100 times smaller than the Sun.
Make a scale model of the Solar System and learn the REAL definition of "space."
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