Question

if a star which is 100 light year away explodes today then when it will be visible to us?​

Answer 1

Answer: So if a star which is 100 light years away from the earth explodes this very moment we would see the explosion exactly 1oo years from now provided we live that long which won't be true in most cases. We will be long dead before the light reaches us. our children might be fortunate to witness this event.