depends on what you call a space, in interplanet space it's kinda true, but it's not earth air it's just some elements and molecules in space, in interstellar space there is almost nothing(1 atom per cm^3 for comparison earth atmosphere has around 10 million trillion atoms per cm^3), in intergalactic space you can say there is nothing, 1 atom per m^3(1 million times less than interstellar)Â
depends on what you call a space, in interplanet space it's kinda true, but it's not earth air it's just some elements and molecules in space, in interstellar space there is almost nothing(1 atom per cm^3 for comparison earth atmosphere has around 10 million trillion atoms per cm^3), in intergalactic space you can say there is nothing, 1 atom per m^3(1 million times less than interstellar)Â