For example, for every eight orbits made by the innermost planet, the next planet orbits five times, while the next one out orbits three times. (sciencemag.org)
So NASA is taking a different approach with its next planet - hunting mission. (scientificamerican.com)
When the black hole starts its next planet - size meal, though, the light show will be hard to miss: Muno estimates the X-rays will be 100,000 times brighter than anything seen before. (discovermagazine.com)