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

In a event that won't be seen again until the year 2040, seven planets will align in the sky at the same time on 28 February ...

Six of the planets in our solar system will line up, in what is sometimes called a 'planetary parade'. They include Venus, ...

A very rare treat is about to grace Earth's night skies.

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that the next won’t happen until 2040.

All month, four planets — Venus, Saturn, Jupiter and Mars — will appear to line up and be bright enough to see with the naked eye in the first few hours after dark, according to NASA.