Question: What caused Krypton to explode?
Socks1000
24th Jan 2011
Superman (1978)
Chosen answer: An atomic chain-reaction in the planet's core. The explosion also irradiated the fragments of the planet, which is why kryptonite is deadly to Superman.
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Answer: That's the updated comic book version. In the movie and the original origin story their red sun was going super nova and caused Krypton's orbit to shift.
Jor-El's conversation with the Science Council in the movie is all about the planet's core.
Captain Defenestrator
You must be thinking of a different movie. There wasn't any mention of the core and when Jor-El says the planet will explode, the reply is the planet is just shifting orbit. Later, Jor-El tells 18 year old Clark they will enter the realm of the red Krypton sun, the cause of their destruction. The answer about Krypton's sun is correct.
Bishop73
I went and looked up the script and it DOES say orbit. OK, you're right.
Captain Defenestrator