The Moon, Earth's only natural satellite, is a celestial body that has fascinated humanity for millennia. Its presence in our night sky has inspired myths, legends, and scientific inquiry. This document provides a concise overview of some key facts about the Moon.
There are things astrophysicists know and things they don't know about brown dwarfs. They know that as they were forming and accreting mass, they failed to gain enough mass to trigger hydrogen fusion and become stars. But they're too massive to be gas giant planets like Jupiter because they do fuse some deuterium. So brown dwarfs are stuck in an astrophysical no-man's-land between star and planet. They're often referred to as 'failed stars'.
