The Mice [NGC 4676] are two gallaxies about 300 million light-years from Earth. These two galaxies will eventually merge into a single, giant galaxy. Credit: NASA, H. Ford [JHU], G. Illingworth [UCSC/LO], M.Clampin [STScI], G. Hartig [STScI], the ACS Science Team, and ESA.
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?