Factnomenal shows excellent Bizarre Space Discoveries That Left Astronomers Worried. These amazing space discoveries will make you wonder what is really out there in outer space. See interesting space discoveries, space facts, and interesting facts about space in general.
Outer space is certainly the expanse that exists beyond Earth and between celestial bodies. Outer space is not completely empty (it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium). It also contains electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays. The baseline temperature of outer space, as set by the background radiation from the Big Bang, is 2.7 kelvins (−270.45 °C; −454.81 °F).
Scientific observations suggest that the majority of the mass-energy in the observable universe is dark energy, a type of vacuum energy that seems to be poorly understood. Intergalactic space takes up most of the volume of the universe, but even galaxies and star systems consist almost entirely of empty space, it seems.