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How & Why Solar Eclipses Happen
The sun is about 400 times farther away than the moon. The two bodies appear almost exactly the same angular size in the sky roughly half the width of your pinky finger seen at arm's length. This truly remarkable coincidence is what gives us total solar eclipses. If the Moon were slightly smaller or orbited a little farther away from Earth, it would never completely cover the solar disk.
eclipse.aas.org -
How long does solar eclipse last? When does it end?
Expected to last around 90 minutes. Most areas will only see it for a minute and 10 seconds. The moon travels at roughly 2,400 mph over the face of the earth.
metro.us -
Eclipse: Who? What? Where? When? and How? | Total Solar Eclipse 2017
Everyone in the world will at least partially see see the solar eclipse. A solar eclipse is when the moon fully covers the sun. You never want to look directly at the solar eclipse.
eclipse2017.nasa.gov
