Astronomy Cast Ep. 337: Photometry

There’s a lot you can learn by just staring at an object, watching how it changes in brightness. This is the technique of photometry, and it has helped astronomers discover variable stars, extrasolar planets, minor planets, supernovae, and much more.? (...)Read the rest of Astronomy Cast Ep. 337: Photometry (46 words) © Fraser for Universe […]