An artist’s rendition of a supermassive black hole surrounded by a swirling accretion disk. One of the most notable aspects about our planet—if observed from the outside—is that it spins. Earth’s spin ...

When you look at the solar system, you might notice that the planets' orbits are tilted, and oddities in the protoplanetary ...

One of the most notable aspects about our planet—if observed from the outside—is that it spins. Earth’s spin defines our days, setting the fundamental rhythm of life on our world. The moon spins, too.

The classical picture of star and planet formation suggests that a star’s rotational axis and the orbital planes of its planets should be aligned. However, exoplanetary systems have considerable ...

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 ...