Brown Dwarfs: Space's Strangely Important Oddballs

You’d think it would be easy to tell if an object in space was a star or a planet - is it big, hot, and shining? It’s a star! Small, cool, and made of rock and gas? Planet! But cosmic oddities know as brown dwarfs remind us that the universe is more complicated and interesting than that.

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[FewVidsJustComments]

2:12
Look at the ball in the bottom left of the screen.under the "Club Planet" sign.
Is that Pluto? good on you, SciShowSpace :)

[levitan]

makes you wonder about how long a brown dwarf would last if it was ignited by the monolith from 2010 movie.

[Archaeopteryx]

Lithium also fuses at a relative low temperature.