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Because they formed and collapsed under the force of their own gravity.
http://wiki.answers.com/Q/Why_is_the_sun_round
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1. Wear sunblock when you go outside for longer the 10 minutes, anytime of the year. A little bit of sunlight is good for our skin to get vitamin D, but to much can damage your skin
http://www.ehow.com/how_5198503_protect-yourself-s...
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walter.
http://wiki.answers.com/Q/Who_are_the_round_charac...
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The speed the Earth travels around the Sun is 29.9 km/s. This is calculated by taking the Earths orbital circumference (942000000 km) and dividing by the orbital period (365 days)
http://wiki.answers.com/Q/What_is_the_speed_of_the...
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