This quiz will explore the science behind the scenery, the facts behind the familiar, and the wonders that make Earth a living planet.
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'.
