THE METHODS OF PARTICLE MIGRATION ON EARTH AND IN SPACE

Particles of dust or fluids exist both on earth and in space. Indeed, in astronomy, the interstellar medium (or ISM) is the matter that, in a galaxy, occupies the space between the stars and merges into the surrounding intergalactic medium. It is a mixture of gases, cosmic rays and dust. The gas can be in different forms such as ionized, atomic and molecular. For example, hydrogen and helium exist in interstellar gas. Solid particles, called interstellar grains, constitute interstellar dust. Do the methods of migration or transport of these particles differ in the two environments, terrestrial and spatial? The first medium is dense and has a strong attraction of gravity. The second is less dense and the particles float. How do these characteristics influence the movements of particles in gaseous fluids?.