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

Our solar system appears beautifully organized, but its stability is actually the result of an incredibly delicate cosmic ...

The team still can't confidently rule out the existence of Europa's water vapor, especially as similar plumes have been more ...

Looking for a sky event this week? Check out our full Sky This Week column. May 21: Check in on Saturn and Mars Tonight we're ...

Neptune has a complicated life story, and its moon Nereid might be the only one left standing from the planet’s ...

The moon dances with the king of the planets, with the horizon as their stage. When you purchase through links on our site, ...

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

Venus, now an "evening star," remains the brightest object in the sky after the moon, while Jupiter shines higher above it ...

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

Venus and Jupiter remain visible in the evening sky soon after sunset early in July, although Jupiter fairly quickly drops ...