Did you know?

Earth's average orbital speed is about 30 kilometers per second. In other units, that's about 19 miles per second, or 67 000 miles per hour, or 110 000 kilometers per hour. Earth's average orbital speed is about 30 kilometers per second. In other units, that's about 19 miles per second, or 67 000 miles per hour, or 110 000 kilometers per hour.
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If I have been able to see further, it was only because I stood on the shoulders of giants. 

Isaac Newton