Nuclear waste is extremely dense and therefore extremely heavy. It would cost an incredible amount of money to launch it into space, let alone the sun. The co

Nuclear waste is extremely dense and therefore extremely heavy. It would cost an incredible amount of money to launch it into space, let alone the sun. The corollary is it's also really valuable since it still contains an incredible amount of energy, our current reactors only burn 5% of it where as future reactors will be able to burn all of it. An analogy I often use is we're burning just the kindling and our 'waste' is the hard oak that's harder to burn.