Step outside just after sunset and you may catch an unusual sight: six planets strung across the sky in a gentle arc. The ...

Nearly every planet will be above the horizon at the same time after sunset, with the moon nearby. The best view comes in a ...

Neptune’s large moon Triton may have abandoned an earlier partner to arrive in its unusual orbit around Neptune. Triton is unique among all the large moons in the solar system because it orbits ...

Neptune stands stationary against the background stars of Pisces the Fish at 11 A.M. EDT. The solar system’s most distant planet is visible in the early-morning sky, now just 1° north of the planet ...

In March, stargazers can catch a total lunar eclipse transforming the full moon into an orange-hued orb. March marks the ...

The Moon passes just 0.02° north of the dim, distant dwarf planet Pluto at 7 P.M. EDT. However, the bright light from our satellite will make Pluto — already a challenging object requiring the largest ...

Neptune’s supersonic winds and icy storms revealed a planet so extreme that it forever changed our picture of the solar system. The discovery of Neptune in 1846 was not just the triumph of mathematics ...