For a few brief evenings around February 28, every planet in our solar system will be visible at once, with Mercury making a ...

Superior planets (those that lie further from the Sun than us: Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto) can reach an elongation of 180 degrees, which is called opposition; that is, they ...

Four planets will be in the parade in January, while seven will align in February. Here's how to see the events.