In January, stargazers will be able to see four bright planets, the close dance of Venus and Saturn, Mars at opposition, and ...

A parade of planets is coming this January, but if you miss it, you can catch it in later months. Six planets in our solar ...

Therefore, astronomers might expect that all of the planets in the solar system would spin in the same direction as the sun. "To look at the direction of the rotation, we always compare it to a ...

Every other solar system planet was named for a Greek or ... protection from Earth's magnetic field, generated by our planet's rotation and its iron-nickel core. This teardrop-shaped field shields ...

There may be an undiscovered planet in the outer solar system whose presence is revealed by the strange orbit of objects beyond the eighth planet Neptune. The tantalizing prospect of a ninth ...

Everyone knows about the Solar System, and the planets that make it up. They’re in space, orbiting the Sun, in an order we all at least used to be able to recite. But it was not always so.

Not every planet has a moon — so why ... moons formed at the same time as their solar system. Solar systems start out with a big disk of gas rotating around a sun. As the gas rotates around ...

It takes 243 Earth days for Venus to do one complete rotation, and 225 Earth days ... All the other planets in the solar system can fit inside Jupiter. The Solar System is ancient.

Mars’s axis of rotation is tilted 25.2 degrees relative ... to a degree unlike any other planet in the solar system. The planet’s northern hemisphere consists mostly of low-lying plains ...