Is No Man's Sky scientifically accurate?

No, No Man's Sky isn't scientifically accurate, and it doesn't try to be. It uses real ideas such as star types, black holes, atmospheres and procedural biology as flavor, but scales, distances and physics are compressed so that exploring feels like an adventure rather than a simulation.

Where it departs from real science

• Distances. Planets in a system are a short flight apart, and you can cross a solar system in minutes. Real planets are millions of kilometers apart.
• Planet size and gravity. Planets are tiny compared with real ones, yet gravity feels roughly Earth-like everywhere.
• Orbits. Planets don't orbit their stars in any meaningful way, and day-night cycles are simplified.
• Life. Almost every world has plants or animals. In reality we know of exactly one planet with life.
• Black holes. Flying into one simply moves you toward the galactic center. A real black hole would destroy the ship.
• Sound and atmosphere. Space has sound, and atmospheric entry has little heating or drag.

What it gets roughly right

The game nods to real concepts: stars of different spectral classes, a galaxy with a dense center, planets with toxic, frozen or irradiated environments, and elements named after the periodic table (carbon, sodium, oxygen). The procedural generation is a real technique: the universe is built from math rather than designed by hand.

FAQ

Does No Man's Sky really have 18 quintillion planets?

Yes, about 18 quintillion planets can be generated across its galaxies. They're created on the fly from a seed, not stored, and no player could ever visit more than a tiny fraction.

Can you find Earth in No Man's Sky?

No. There's no Earth in the game, though players sometimes find planets that look Earth-like.

Are there black holes in No Man's Sky?

Yes. They act as shortcuts that jump you closer to the galaxy's center, at the cost of some ship damage.

What is the purpose of No Man's Sky?

There's no single goal. You can follow the story toward the galactic center, build bases, trade, fight or simply explore.