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

Is the universe flat and infinite, or something more complex? We can’t say for sure, but a new search strategy is mapping out ...

Planet Parade, visible from January 21 to January 29, showcases the rare alignment of six major planets: Mercury, Venus, Mars ...

If it’s real, some may question whether something with a mass about three times Pluto’s counts as a planet at all.

BS4 may be anywhere between 17 and 40 feet across, and will approach at about twice the distance between the Earth and moon.