Solar System Astronomers recently discovered that Scholz’s star passed close to the Sun 70,000 years ago. Wouldn’t its gravity have sent Oort Cloud comets raining into the inner planets?
Science If our Sun is a typical star, and if most stars are surrounded by Oort clouds, why do these clouds not obscure our view of other stars?
Solar System What effect, if any, do the objects in the Kuiper Belt and Oort Cloud have on the orbits or characteristics of the eight major planets?
Solar System I’ve heard that the Oort Cloud contains trillions of icy bodies. What would be the average distance between these bodies?