Multiple planet systems, like our solar system, are often referred to as peas in a pod. But these co-orbiting planets could be “pearls on a necklace,” says University of Kansas astronomer ...

The easiest planet to spot will be Venus ... The planets will all appear “kind of like pearls on a necklace” across the night sky, Hummels said. The entire alignment will cover just about ...

Cave pearls the size of tennis balls feature in the Planet Earth III episode “Extremes ... examples – such as this antique cave pearl necklace. The spherical formations come in many ...