Today we’re taking a look at that hot glowing ball of plasma we call the Sun. 1. It’s Really Massive In fact, the Sun accounts for over 99.8% of the total mass of the Solar System. That’s right – all the planets and all the moons and all the other small cosmic objects make up less than 0.2% of the Solar System’s mass. In you want some really big numbers, the Sun’s mass is approximately two nonillion kilograms (that’s a two and thirty zeroes). By volume, the Sun is equivalent to 1.3 million Earths. Actually, the solar mass is used
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