Superman's power ups?
I'm not very familiar with Superman, but I've read a few stories, and I was wondering what the various levels of Superman's power have been over the years. It helps to compare him to other characters.
Now, I know it goes from Golden Age Superman through Silver Age to Post-Crisis, but within the Post-Crisis era it can be further split down, because in 1986, Superman could be KO'd by a nuke and couldn't breathe in space. When did the weaker Superman who was killed by Doomsday change? Even coming back from death, he wasn't any stronger straight away.
Currently, Superman can survive supernovas and so on. Also, in the Golden Age he couldn't fly at first, but later on, he could because of the radio shows.
Can anyone give me a list of what and when of the various leaps in power (obviously some happened gradually), such as going from being able to be hurt by artillery shells to surviving in stars?