The second volume explores the content of Newtonianism: themes and areas of study, such as celestial mechanics and gravitational theory
, the role of experiments, and evidences of the Christian religion.
Rovelli, a founder of loop quantum gravitational theory
and a bestselling author, has a gift for making the abstruse intelligible to those of us who are not theoretical physicists, filling his lyrical prose with references to philosophy, art, literature and his very personal reflections on the "brief circle of our existence." Time, as Rovelli explains it, is an illusion, and our perception that it flows is counter to physical reality--and that's only for starters.
The most effective gravitational theory
in the last century is the theory of general relativity (GR).
While most scientists believe that even though we have been unable to detect it just yet, dark matter does exist, and that it is responsible for the (http://theory.uwinnipeg.ca/physics/circ/node7.html) violations of Newtonian gravitational theory
observed in the rotation of galaxies, there are some who have raised doubts over its existence.
His fields of interest include Gravitational theory
, Astrophysics and Cosmology.
I should clarify that this theory does not, contrary to what some people think and say, make Newton's gravitational theory
incorrect; indeed, the latter remains valid wherever gravity is not too strong, and so we continue to teach it to students and apply it in most cases of our world.
"What we have observed from various sources is that we need to either amend gravitational theory
as we know it or hypothesise the existence of new forms of matter and energy -- which we call dark matter and dark energy," said Dr Skordis, who studies cosmology or the study of the universe.