What will happen when Betelgeuse explodes?

Answer 1

If the Sun was replaced by Orion's star Betelgeuse , its size would completely engulf the earth. Also it would extend past the orbit of Jupiter, and most of the planets would be inside the star including Jupiter. Betelgeuse would outshine the Sun like our Sun outshines the Moon. Unfortunately the Earth would have a "Front Row Seat" when the Red SuperGiant blows itself into oblivion. The explosion would be so bright that the star in Orion (constellation) which is 640 Light Years away. Days would still change from day into night, but for a few weeks or so it would appear like there are two Suns in the sky.

this is what would happen when Betelgeuse explodes :)

Answer 2

When Betelgeuse explodes as a supernova, it will release a tremendous amount of energy and light, becoming extremely bright and visible even during the daytime. The explosion will likely result in the formation of a neutron star or a black hole at the core, and the outer layers will be ejected out into space, enriching the surrounding regions with heavy elements.