Transient 'objects' after nuclear tests are quite possibly high energy radiation from the tests themselves. Remember these are on film, and the film is likely removed from its protective housing for some time before, during, and after imaging. (And in many cases protective housing wouldn't help anyway.)
I get the sense that this topic is popular because "aliens y'all". It's much more likely to be radiation. It's possible that atomic tests kick luminous particles into the upper atmosphere. But it's not aliens.
I get the sense that this topic is popular because "aliens y'all". It's much more likely to be radiation. It's possible that atomic tests kick luminous particles into the upper atmosphere. But it's not aliens.