Misc: how many sides does a baseball homeplate have?

Questions

Astronomy What is the name for the theoretical end-product of the gravitational collapse of a massive star?

Astronomy What is the name used to describe the "minor planets"?

Astronomy What is the ocean of air around the earth called?

Astronomy What is the proper name for falling stars?

Astronomy What is the term for the path followed a by a small body around a massive body in space?