Now, in a new yet-to-be-peer-reviewed paper, an international team of astronomers analyzed data collected by the European ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and Earth. The authors dubbed it Planet Y.

IMAP mission will explore our solar system's protective heliosphere and will also help us develop a better understanding of ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...

There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s hiding in plain ...

NASA is set to launch three spacecrafts Tuesday with the goal of unlocking the mysteries of solar weather at the edge of our solar system.

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...