Did you know? Here’s a space weather and radio...

Did you know? Here’s a space weather and radio propagation educational tidbit – from http://SunSpotWatch.com – at 14:00 UTC on 2017-08-04:

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.

• • • • • • • +

BOOK SALE: Space Weather and Sun Science - get these from Amazon, and help us stay online!

NOTICE: When you buy this (or any item after starting with this link), you are helping us keep our SunSpotWatch.com and other resources “on the air” (up and running!). In other words, you are helping the entire community. So, check out this book:

Here is the link to Amazon: http://g.nw7us.us/fbssw-aSWSC

• • • • • • • +

Don’t forget: You can also get the space weather and radio propagation self-study course, today. Visit http://nw7us.us/swc for the latest sale and for more information!

• • • • • • • +

Visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com

See the live aurora mapping is at http://ift.tt/2lYUS2h

If you are on Twitter, please follow these two users:

• http://ift.tt/1iWH4ta

• http://ift.tt/1wJXm19

from Ham Radio Times http://ift.tt/2vAabUn
via IFTTT