So exactly how many solar system moons have we found? The answer, it turns out, depends on your definition of a moon. The International Astronomical Union (IAU) officially recognizes 288 planetary ...

The Solar System is our immediate neighborhood and its planets and moons have shared the same astrophysical environment, e.g., experienced the same evolution of our central star, the Sun. Nevertheless ...

While Mercury will be visible throughout early March, there will be two nights that provide especially good opportunities to ...

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare ...

"It's like a game of billiards around the solar system, flying by a couple of planets at just the right angle and timing to ...

There are also moons in the solar system, that is objects orbiting around the planets. In fact just over 180 moons at the last count. And some of those moons are so large that if they were ...

Once it arrived, the lander took plenty of pictures of our nearest celestial neighbor. From here, Blue Ghost will spend the ...

Since planets keep their position relative to surrounding stars in the sky, the Moon will track eastward from Jupiter, the largest planet in the solar system, until it reaches the Red Planet ...

The moon, nearly two nights past first ... revolving counterclockwise just as we are (as seen from a position north or "above" the solar system). Earth's faster motion around the sun is causing ...