How far is the closest star to earth?

Answer 1

The closest supernova, or more correctly supernova remnant, is the Vela supernova remnant [See Link] in the constellation Vela. The "guest" star exploded about 11 - 12,000 years ago and is located around 800 light years from Earth.

Answer 2

Supernova are at times missed, because they are sudden, and duration of them is short.

They are the most gigantic nuclear explosions we know of.

One of the stars that my go supernova within the next 100 years or less, is Betelgeuse the right shoulder of Orion.

I do not know of a current supernova, like every object in space, every source of light that we see is in the past. The farther away, the farther in the past.

Answer 3

1.5 light years but since the sun's gravity travels 1.5 light years it is part of our solar system

Answer 4

The closest supernova that ever exploded was 290 light years from earth