Narrator: Black holes are some of the most ... Brown noticed that some of them have highly unusual orbits. While most objects in our solar system orbit the same plane, and in the same direction ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

"That's when we started thinking about the very precisely measured orbits of objects in the solar system." In principle, a primordial black hole's gravitational pull "could produce wobbles in the ...

The Sun is the largest object in the Solar System. The Sun's huge gravitational ... for example, Mercury orbits once every 88 Earth days, but Neptune orbits once every 165 Earth years For a ...