Hello Games' No Man's Sky made an appearance at Gamescom last week, where studio co-founder Sean Murray talked about just how big his new game will be. We knew it would be big, but we had no idea just how vast No Man's Sky is going to be.

Murray explains that in early development the game generated its universe with a 32-bit number, meaning that "with that 32-bit number it would take you four or five thousand years to see every planet if you spent only a second on each one." That's gigantic on its own, but Hello Games apparently wasn't content with that and decided to go even bigger, now using a 64-bit number to generate all of its planets.

How big does that make the game? As IGN reports, the 64-bit number means that the game generates 264 (two to the 64th power) different worlds, which goes into the quadrillions. Should you spend a second on each planet, as per Murray's example, that equates to spending about five billion years inside No Man's Sky in order to see everything -- that's more than how long the Sun has left to burn. If you were doubting the size of this game, doubt no more.

There will be plenty of sky for no man to ever fully explore when the game finally launches in 2015 for Playstation 4, with a PC release coming sometime after.

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