The star system V1298 Tau reveals that many planets begin as large, low-density worlds that slowly shrink and shed their ...

Planet 9 sits at the edge of scientific imagination, promising either an epic expansion of the Solar System or a lesson in ...

The discovery of an extraordinary multi-planet system has demonstrated that so-called "hot Jupiter" planets may not be lonely giants after all. The findings could force scientists to revise their ...

A four-planet system reveals remarkable insights about how planets form and how they change during their lifetime.

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...

Now, a new Nature study points to an answer by catching four planets at a stage most systems never show us: The awkward, ...

"The combination of extreme disk size, strong asymmetries, winds, and potential planet formation makes it the perfect ...

The planets have been nicknamed Earth's seven sisters. — -- An international team of astronomers has discovered seven potentially habitable exoplanets — or planets outside our solar system — that ...

Most planets are part of a star system of their own – but some go their own way, and they have remained largely mysterious ...

Planet Y is the latest in a series of hypothetical solar system planets that scientists have proposed in recent years, all with slightly different characteristics but collectively believed to be ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...