Have you ever wondered why all the planets in our solar system orbit the Sun in roughly the same flat plane? This fascinating phenomenon isn’t a coincidence but a direct result of how our solar system ...

This video explains why planets in our solar system orbit in nearly the same plane, tracing their origins back to a rotating protoplanetary disc of dust and gas that formed around the young Sun. It ...

Discovered in 1846 through mathematics rather than sight, Neptune was the first planet found by calculation — astronomers ...

All the planets orbit in roughly the same plane because they formed from a single rotating disk of gas and dust — the solar nebula — that flattened as it spun around the young Sun. The shared origin ...

Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar system was touted more than a century ago. But ...