The moon will pass in front of Regulus for some observers on May 23, blocking its light.

Astronomers believe Triton may not have originally formed around Neptune.

A study suggests that the ice giant's largest moon, Triton, made a dramatic entrance to the Neptunian system long ago, ...

Neptune’s third-largest moon, Nereid, could be an intact survivor from the planet’s original satellite system, upending ...

Jupiter’s moon Ganymede is larger than the planet Mercury, hides a massive ocean beneath ...

Here's what's nearly out of the camera frame.

Dr Sarah Alam Malik suggests Saturn's moons Titan and Enceladus, and Jupiter's moon Europa, may host conditions suitable for ...

This close pairing, known as a conjunction, offers one of the easiest and most photogenic sky events of the year, and needs ...

Neptune , the farthest of the planets, acts like a shepherd for the outer solar system, gravitationally scattering distant asteroids known as Kuiper ...

The James Webb Space Telescope (JWST) has made a weather forecast for the exoplanet WASP-94Ab, a world with clouds of sand in ...

Earth has a group of cosmic stalkers. Known as "co-orbitals," these small bits of rock have a 1:1 mean motion resonance with ...