When astronomers talk about an optical telescope, they often mention the size of its mirror. That's because the larger your mirror, the sharper your view of the heavens can be. It's known as resolving ...

The Allen Telescope Array, Hat Creek Radio Observatory. Credit: Alexander Pollak. Radio interferometry is a technique in radio astronomy where signals from two or more radio telescopes are combined to ...

Interferometry basics Three principle values describe any wave: amplitude, frequency, and phase. In fact, the basic equation for a sinusoid of frequency (ω) or period (2π/ ω) is: f (t) = A cos (ω t + ...