Despite the dramatic name, these alignments aren’t exceptionally rare. The last six-planet parade occurred in January 2025, and a four-planet lineup followed in August 2025. What makes each one feel ...

With a glance toward the southern sky this month, you’ll see Jupiter, the largest planet in our solar system. With a telescope or good binoculars, you may also see several of Jupiter’s 79 known moons.

On the martian surface, would the moons Deimos and Phobos be visible to the unaided eye? David De RooSilver Spring, Maryland Mars' moons are easily visible at night from the surface of the Red Planet.