Morning Overview on MSN

Planet 9 mystery deepens: epic discovery or cosmic illusion?

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

Evidence of controversial Planet 9 uncovered in sky surveys taken 23 years apart

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth. When you purchase through links on our site, we may earn an affiliate ...
Morning Overview on MSN

Planet 9 is still invisible, but the numbers won’t let it go

Far beyond Neptune, something heavy appears to be tugging on the outer solar system, bending the paths of distant icy worlds in ways gravity alone should be able to explain. Planet 9, still invisible ...
CNN

Scientists have fiercely debated the existence of ‘Planet 9’ for a decade. Some say evidence is piling up

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Our solar system ...