including Jupiter's and Saturn's outer moons, were probably gravitationally captured by their planets. Earth's moon is ...

A new study implies that in the past, moons in our solar system may have had rings just like planets do — deepening the ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

Most of the other moons in our solar system are a tiny fraction the size of their parent planets. Most of the these relatively small moons were likely asteroids gravitationally captured by the ...

And some of those moons are so large that if they were orbiting around the sun, rather than the planets, they would count as planets in their own right. So for example, Saturn's largest moon ...

For more information on this year's full moons and biggest celestial ... Venus is another planet that continues dominating the western sky after sunset. Venus and Saturn will have their closest ...

You’re looking at its four Galilean Moons, by far the largest of the giant planet’s estimated 79 moons. Their collective name comes from the fact that Galileo first observed them in the year 1609.

The full moon will be at peak illumination at ... the sun from the vantage point of Earth. As the two planets travel along their orbital paths, Earth will be between Mars and the sun.

Opinions expressed by Forbes Contributors are their own. Jamie Carter ... sight of 2025 — a panorama of bright planet Venus and a delicate crescent moon. Best viewed on Jan. 3, the duo appeared ...

Simpler models from the early 2000s simulating how Pluto and Charon came to be in their current orientation ... This process occurs when the interiors of planets or moons are heated due to the ...