New findings offer clues about the ancient origins of asteroids and their potential role in the formation of terrestrial ...

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

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

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 takes only 88 Earth days to orbit the sun.

Astronomers discovered the gas giant planet — dubbed a "hot Jupiter " — in 2016, but have continued to investigate this ...

If planets had social media accounts, the solar system would showcase a frenzy of unique personalities. Mercury tweets at ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

A shortcut for New Yorkers to spot some of the planets is to look for them when they are near the moon. On Feb. 1, Venus will ...