The sun generates about 400 billion billion megawatts of power and it has done so for five billion years. Nuclear fusion - combining lighter atoms to make heavier one - is what makes it possible.
Astronomers have been watching a faint comet - Comet Hergenrother - in hopes it would put on a good show. Now it appears the comet is breaking to pieces.
Andromeda will collide with our MIlky Way in 4 billion years. It had a close encounter with another Local Group galaxy long ago. Yeah, Andromeda. You're tough.