Oxford University Press's
Academic Insights for the Thinking World
How big is the Moon in the sky? What is its angular size? Extend your arm upward and as far from your body as possible. Using your index finger and thumb, imagine that you are trying to pluck the Moon out of the sky ever so carefully, squeezing down until you are just barely touching the top and bottom of the Moon, trapping it between your fingers. How big is it?
Millions of people will soon travel to a narrow strip in America to witness a rare event: a total solar eclipse. On 21 August, many will look up to the sky to witness this phenomenon – will you be one of them? In the following shortened excerpt from Totality: The Great American Eclipses of 2017 and 2024, learn what types of eyewear you should be using to watch the Sun disappear
How do you capture the spectacle of a total eclipse with a camera? Photographing an eclipse isn’t difficult. It doesn’t take fancy or expensive equipment. You can take a snapshot of an eclipse with a simple camera (even a smartphone) if you can hold the camera steady or place it on a tripod. The first step in eclipse photography is to decide what kind of pictures you want.