Kalndenard’s star.

Kalndenard’s is a green ultra-bright star, it has one habitable planet.

Green ultra-bright stars can only be dwarf stars, as they eject mass at an incredible rate. They eject too much to possibly stay average or large. They eject alot so they can contain their brightness. These stars live only 5 million years! since they eject so much, they eventually eject all their mass, with the brightest supernovas. The flash flashes so bright, that if your staring directly at it, you could go blind. It flashes only 1 time and very quickly. And immediately, their planets fall out of orbit, and they disappear as if they never existed.