Along the lunar orbital path, the point of closest proximity is known as perigee, which is when the moon is, on average, ...

Astronomers resolve longstanding mystery of Gliese 229B's dimness, despite its considerable mass. A Caltech-led team ...

Scientists say a celestial object discovered decades ago is actually twins orbiting each other. The discovery was published ...

Exploring the Enigmatic Secrets of Europa, Jupiter's Icy Moon Scientists were puzzled by one of Jupiter's fascinating moons, ...