Brown dwarfs are celestial bodies that are too large to be classified as planets but too small to sustain nuclear fusion like stars.
They are often called "wannabe stars."
The first brown dwarf was confirmed in 1995, marking a significant finding in astronomy.
Characteristics:
Brown dwarfs can burn deuterium (a heavier form of hydrogen) but lack the mass needed to burn regular hydrogen, which is the process that powers stars.
They are generally more massive than the largest planets, with some having masses 30-80 times that of Jupiter.
Gliese 229B
Researchers found that the first brown dwarf discovered (Gliese 229B) is actually two brown dwarfs, Gliese 229Ba and Gliese 229Bb, orbiting closely together.
This binary system is unusual for brown dwarfs but common among stars, indicating a gravitational lock between the two.
These brown dwarfs are located 19 light-years away from Earth in the constellation Lepus
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