This blue hypergiant with the catchy name is one of the brightest stars in the Milky Way and led the list of the largest stars for a while. Unfortunately, it can’t be seen with the naked eye since it is hidden behind interstellar dust. The brighter a star is, the more mass it ejects constantly, and every 20 seconds the Pistol Star radiates as much energy as the Sun does in one year.
Keishinrei 