When I watch the World Cup, I always think about set pieces. This is when the ball is placed at a certain spot and a team is allowed to then kick the ball (called a free direct kick). If this kick ...

You know I like to use pictures for data from time to time, right? One problem is that I don't know much about cameras. There, I said it. Really, almost all of my photos are made with my phone. That ...

I dabble in digital photography-- over at my other blog, I'm doing a photo-a-day project-- which means that, like a lot of amateur photographers, I've acquired a collection of lenses of various types.

Astronomers utilize angular measurement techniques for determining the spatial separation between celestial objects. The methodology involves measuring the angular distance or size. Angular ...

THE existence of a source in the Crab Nebula with an angular diameter of less than 1 sec of arc has been revealed by observations of interplanetary scintillation at a frequency of 38 Mc/s (ref. 1).