On the Origin of Great Nebulae

Abstract

The formation of condensation due to gravitational instability is discussed in a uniformly expanding space. It is shown that such condensations cannot be formed at the present stage of the development of the universe but could have been formed in the past when all linear dimensions were 600 times smaller. This corresponds to the stage at which, according to astronomical observations, nebulae have been separated from each other. To get the correct dimensions of nebulae it is necessary to accept that the velocities of particles at the moment of separation were about 140 km/sec. which strongly suggests that these particles were stars and not atoms. The type of expansion necessary for the formation of nebulae indicates that space is infinite and unlimitedly expanding.