Learn how a possible ninth planet, the theoretical Planet X, could have acquired its wide orbit in the outer Solar System - a ...

Discovery of a possible dwarf planet suggests our cosmic backyard holds many more secrets to uncover It is an evocative idea ...

A US-based trio hunting "Planet Nine" has instead stumbled on what appears to be a new dwarf planet in the solar system's ...

Astronomers have just discovered a new celestial body in our solar system that could challenge major space theory. 2017 OF201 ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

Researchers from Rice University claim to have fresh evidence of Planet Nine - as well as a method to find it.

Cheng, together with graduate students from Princeton University, discovered the potential dwarf planet while searching for ...

T hree cheers for Liberal MP Andrew Hastie, a potential party leader, for speaking the plain truth on the ABC’s Four Corners.

The robotic Tianwen-2 spacecraft will collect samples from Kamoʻoalewa, which some scientists suspect is a fragment of the moon.

SpaceX's Starship rocket roared into space but then spun out of control about halfway through its flight, failing to complete ...