Search results
- DictionaryOut·er space/ˌoudər ˈspās/
noun
- 1. the physical universe beyond the earth's atmosphere.
Powered by Oxford Languages
noun
Powered by Oxford Languages
Outer space (or simply space) is the expanse beyond celestial bodies and their atmospheres. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust. The baseline temperature of outer space, as set by the background radiation from the B... Wikipedia