With a sun more than 4.5 billion years old, our solar system is considered "middle-aged," and the pictures of what it might ...

The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star.

When a mudflat crumbles on Earth, or an ice sheet splinters on one of Jupiter's moons (Europa), or an ancient lakebed breaks ...

Whether it's rivers cutting through earth, lava melting through rock, or water slicing through ice, channels all twist and ...

Another finding was how dramatically the planets varied in brightness over just three years. The team discovered that PDS 70 ...

A lot of planets are currently visible in the night sky. Leah Crane has some great field tips to help you spot them ...

A rare grouping of 10 celestial bodies is captured in a stunning new photo taken during last weekend’s great planetary parade ...

"We might have finally found the cause of a mystery that's lasted over 40 years," said researcher Sandino Estrada-Dorado.

The discovery of new exoplanets can help scientists understand how planets form and evolve. Scientists from UNSW Sydney have located a potential new exoplanet -- a planet that orbits a star outside of ...

Healdsburg astronomer Dan Gordon will help guests make the connection between the moon and planets in the night sky.

The two innermost planets, Venus and Mercury, will shine together low in the western sky at sunset on March 10. Here's how to get the best view before they disappear.