Appropriately named, Helene is a Trojan moon, so called because it orbits at a Lagrange point. Two protostars are hidden in a single pixel near the center of a striking hourglass-shaped nebula in this ...

Skygazers can enjoy meteor showers and other dazzling displays in the night sky all month long, according to astronomers.

Charles Messier was an 18th century comet hunter who compiled a list of nebulae and star clusters – objects that could be mistaken for comets in a small telescope. His ...

Scientists, using infrared images from NASA's Spitzer Space Telescope, have found that the Milky Way’s graceful spiral structure is primarily shaped by two arms extending from a central bar of stars.