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As far as I know, Superman has super powers because of Sun in our solar system. In Superman/Batman: Apocalypse he goes out of the solar system to fight Darkseid. I don't know if this happened before.

So, if he gets power from our Sun, how was he able to go outside of solar system?

EDIT:

I am not suggesting that Superman need a direct sun rays on his skin, but just to be "near" our Sun, i.e. in Solar System.

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The short answer : Yes he does

To answer your question properly, we would have to know what Superman you are talking about. See As of 2012, how many different canon versions of the Superman character exist? for more details. If you are talking specifically about that Superman/Batman Apocalypse, then the question should be why does he keep his power, because he obviously does.

Anyway, I'm going to give you a few possibilities as to why Superman does keep his powers outside of our solar system. If you want more details, there are a lot of questions on this site about Superman’s powers.

First possibilities that come to my mind : Superman's powers come from a yellow star. Not particularly our sun, just a yellow one. And the range of a star is pretty good... The more bright is the star, the further its range would be. So even outside our solar system, either it is the Sun or another yellow star that gives him his power, Superman does keep them.

Second possibility : Superman's skin allow him to store energy. His skin stores the Sun's energy when it is exposed to its beams, and this energy can be used later. When there is no more energy, Superman loses his power. This is one of the answers to How did Doomsday killed Superman?

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    Of course, our sun is actually white, it only looks yellow through our atmosphere; assuming Supes only needs a "significant" amount of yellow-wavelength radiation, any class K/G/F star should suffice. Those make up about 25% of the stars in the galaxy. (Note that even "red suns" emit yellow radiation, just relatively little of it.) – KutuluMike May 16 '13 at 12:43
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Superman gets his powers from a "yellow sun" not necessarily our sun (Sol). He absorbs the solar radiation to power his abilities, and stores it for later use. So as long as he's either near a "yellow sun" or doesn't expend his solar reserves he will be able to access his abilities. This is how he retains his abilities indoors, or at night time.

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The only thing I would add to all the above, is that in some earlier stories, he either wasn't near a suitable sun or our sun became red and he used his Supermobile which provided him with all the power he needed.

in the comics it duplicated his powers and in the cartoon it provided him with power IIRC

Here's a link supermobile

  • How canon is that supermobile ? – Kalissar May 16 '13 at 20:09
  • it's from Action Comics #481; so I'd have to say yes it is canon. I'll try to find a citation later... – djm May 16 '13 at 20:54
  • It's quite canon. I remember reading the comic as a kid. It was not a imaginary tale and the Supermobile had a few appearances after that. Yes, it was a goofy story and an even goofier design (why not build a robot type exoskeleton...) but I remember the tale fondly just the same... – Thaddeus Howze Dec 10 '13 at 8:26
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  1. Superman doesn't go out of super powers at night, it means that he doesn't need continuous solar radiation like Nuclear Man to have his super powers.

  2. Superman can consume yellow radiation generated by anything which includes yellow stars other than Sun and even artificial objects.
    In Justice League, once Toyman sent Superman in future when the Sun was red. In that situation, he got his super powers back from an artificial energy generator which was similar to Sun. Such thing has been happened many times in the canon.

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In the Richard Donner film (1978) Jo'rel said the yellow sun's radiation would affect his son's body chemistry giving him his powers once he was exposed- he didn't say he had to be exposed to the sun 24/7.

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