brown dwarf

Introduction
A Brown Dwarf, also known as a Failed Star, is a mass in space that is in between being labeled a Star or a Planet. This does not mean that a Brown Dwarf is small by any means of the measure, for a Brown Dwarf, while the size of 0.075% that of The Sun it is still as big as 75 Jupiter-sized planets. To be specifics a Brown can be from 2.5e+28 Kilograms to 1.5e+28 Kilograms. Examples of Brown Dwarfs are Upsilon Andromedae, Gliese 229, CT Chamaeleontis, Epsilon Indi & Xi Ursae Majoris B.
Failure of a star
What makes a Brown Dwarf  a "failed star" is the fact that they do not retain a stable luminosity by thermonuclear fusion of hydrogen. Both Stars and Brown Dwarfs start off with their cores contracting and fusing hydrogen, achieving higher temperature. The difference comes later on when The Brown Dwarf ceases to contract due to their cores being dense enough to pause things with electron degeneracy pressure. For Brown Dwarfs the size above 60 Jupiters, will come to stabilize and fusion of hydrogen will halt.
The Name Brown Dwarf 
Brown Dwarfs, despite their name, are not the color brown. Brown Dwarfs are actually a deep red or magenta color. Once Upon A Time, Brown Dwarf were titled Black Dwarfs, but it was later changed to Brown Dwarf, since it's actually color was reddish, but the title Red Dwarf was already taken, so Brown Dwarf became its new name. 
Afterlife of Brown Dwarf
Brown Dwarf don't really die like other stars do, Brown Dwarfs simply remain Brown Dwarfs eventually cooling down more & more over time.
Conclusion
Some things in life never begin, sometimes they begin well and then never come into being. Either by chance or by lack of effort doth this occur. Brown Dwarfs being failed stars represents this well. If you do not get up and work at something, thou shalt suffer the same fate as a Brown Dwarf. Do not be stagnant in life, but move and improve thyself and thou can reach the stars!