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

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

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

"See To Believe uncovers the forgotten, mind-blowing facts that will leave you questioning everything. Follow wild stories of mysterious creatures, ancient civilizations, how tech impacts our world in ...

improving our understanding of planet formation and potentially shedding light on the origins of our own solar system," says David Cont from the Ludwig Maximilian University of Munich, Germany ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A planet-size object that possibly once visited the solar system may have permanently ...

For many years scientists have been wondering if a mysterious ninth planet lurks in our Solar system. “Planet Nine”, dubbed, has fascinated scientists for its ability to account for “anomalous” ...

However, this year a powerful new telescope is coming online that could prove once and for all that there really is a ninth planet in our Solar System. The same year that Pluto was ignominiously ...

Planets in our solar system orbit the Sun in different orbits in three-dimensional space. Scientists have claimed that an interstellar visitor, much larger than any celestial body in our solar ...

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.