While there are nuclear weapons with megatons, the bomb in Hiroshima had 15 kilotons which is on the same order of TNT equivalents of the propellent of a starship. See my other comment.
While there are nuclear weapons with megatons, the bomb in Hiroshima had 15 kilotons which is on the same order of TNT equivalents of the propellent of a starship. See my other comment.