R136a1 could once have been 320 times as massive as the sun. That's twice as massive as scientists thought a star could be. Perhaps R136a1 is several stars close together, some say.
R136a1, hundreds of times the mass of our sun and millions of times brighter, was spotted in a star-making nebula some 22,000 light-years away.
A homeless star on the outskirts of the Tarantula Nebula is racing across the universe at breakneck speed