Astronomy or space to simply reminded sky above my head and the sky world called heaven, rich atmosphere bastutprithiver. So the world is forever outside the Earth's atmosphere the sky in the background. This very small density of akashsimay object exists. In other words, empty space is not empty completely. Mainly, it is a small amount of hydrogen plasma, radiation, magnetic field and taritchumbiya in the neutrino. Theoretically, black body and krishnashkti. Space there is a lot that people still could not imagine.