The Sun is about 100 times wider than the Earth and the Earth could fit into the Sun over one million times. It would take 500 years for the fastest person on Earth to run the distance from the ...

This series of his videos explains how size, distance, and space make solar system models so tricky.

At the edge of our solar system, a host of large, icy bodies make up the Oort cloud, which appears to sport two spiral arms reminiscent ... new study were interested in the inner Oort cloud for ...