The largest amount of antineutrinos detected about the Earth is emitted by the natural radioactive decays of Th-232 and U-238 chains isotopes and of K-40. Other flux components are yielded by cosmic rays interactions in the atmosphere or by possible extra-terrestrial sources such as supernovae explosions, gamma ray bursts, GW events and solar flares. This contribution is aimed to summarise the results obtained by the Borexino experiment about antineutrinos from the Earth and from extraterrestrial sources.
