Donald trump died and went to the last judgment. Save from hell, it can only be a mission to the coronavirus. There, humanity has a chance, with the help of the us President, to escape from a terrifying...
Since it was first published in 1987, Galactic Dynamics has become the most widely used advanced textbook on the structure and dynamics of galaxies and one of the most cited references in astrophysics. Now, in this extensively revised and updated...