What does a complete blood count measure? A CBC measures the amount of 3 types of cells in your blood: White blood cell count. A white blood cell count, also called a leukocyte count, measures the total number of white blood cells in a sample of blood.
In the umbra, the light from the Sun is completely blocked by the Earth. Our lunar observer would see a total solar eclipse; we see the Moon darkened, but glowing a dull red from light scattered by the Earth's atmosphere.
Pick the perfect spot to view the 2017 solar eclipse. The total solar eclipse that moves diagonally across the country on Aug. 21, 2017, will be the first total solar eclipse visible from the continental United States since 1979.