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.
IBTimes UK asked optician Georgina Kendrick, from the Didsbury Eyecare in Manchester, how to safely watch the solar eclipse â and what happens if you do not do so carefully. You should never look directly at the sun, even through binoculars or telescopes as the eye can still easily be damaged.