Mercury takes only 88 Earth days to orbit the sun.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see.

Mercury joins the night sky to complete a seven-planet alignment just after sunset for the end of February. Saturn leaves our ...

That is a little over 3% of the average sun-Earth distance. The effect of this seasonal variation on the planet's climate is negligible; Earth's seasons are dictated by the tilt of Earth's axis ...

UK researchers have confirmed the existence of a “super Earth” located 20 light-years away that could reveal the existence of ...