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.
This article is about the astronomical term. For the floral part (perianth), see Corona (perianth). For other uses, see Corona (disambiguation). During a total solar eclipse, the solar corona can be seen by the naked eye.