Polarized light around a young nebula. Named prior to telescopes that revealed its true shape, the Boomerang Nebula is a very cold place with a temperature of about -459 degrees Fahrenheit or 1 K. Credit: NASA, ESA and The Hubble Heritage Team [STScI/AURA].
Lights in Series and in Parallel
Why is it that those old strings of holiday lights stopped working as soon as one light burned out? Couldn't they make them any better?