The Atlas is a floating translucent diamond which plays a large part in the story of No Man's Sky. It is stated by Sean Murray in IGN's 18 Minute Gameplay video that Atlas is a central computer system where all data is stored. Not much is known about the Atlas, which is part of the larger Atlas Discovery Network.
The Atlas is a mysterious object which features in the advertisements and logo for No Man's Sky. The developers have described it as challenging "Explorers attempting the journey to centre of the Galaxy." Despite this seemingly aggressive description, the name itself suggests it can be used as some sort of star map or travel catalyst, though specifics and descriptions have yet to be released. Korvax worship the atlas.