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Did you know? Here’s a space weather and radio propagation educational tidbit – from http://SunSpotWatch.com – at 14:00 UTC on 2017-05-02:
The Sun is approx. 149,600,000 kilometers (or 93,500,000 miles) away from the Earth. It takes approximately eight minutes for light and radio waves to travel from the Sun to the Earth. The Sun is about 330,000 times more massive than the Earth and the Moon combined. The average radius of the Sun is 109 times greater than the radius of the Earth, or about 696,000 km.
It takes approx. 27 days for Sun’s solar equatorial regions to complete one rotation. Yes, the Sun rotates; it takes approximately 27 days for one full rotation, so we see the complete Sun during that approximately 27 day rotation. That’s why some sunspot groups come back around and we can predict, somewhat, what the Sun will be doing in the future, based on that rotation time, and the decay we detect in a sunspot group.
Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com
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