The explosion takes only a few minutes. The remnant can be seen for a billion years or so. Our solar system (including us) exists only because a supernova exploded about 8 billion years ago and created the atoms in us (the iron in our blood, the calcium in our bones, and everything within several billion miles of here).
The explosion takes only a few minutes. The remnant can be seen for a billion years or so. Our solar system (including us) exists only because a supernova exploded about 8 billion years ago and created the atoms in us (the iron in our blood, the calcium in our bones, and everything within several billion miles of here).