List of string theory topics. List of cosmologists. This is a list of people who have made noteworthy contributions to cosmology (the study of the history and large-scale structure of the universe) and their cosmological achievements. A[edit] Tom Abel (1970–) studied primordial star formationRoberto Abraham (1965–) studied the shapes of early galaxiesHannes Alfvén (1908–1995) theorized that galactic magnetic fields could be generated by plasma currentsRalph A. Alpher (1921–2007) argued that observed proportions of hydrogen and helium in the universe could be explained by the big bang model, predicted cosmic background radiationAristarchus of Samos (310–230 BC) was an early proponent of heliocentrismAristotle (circa 384–322 BC) posited a geocentric cosmology that was widely accepted for many centuriesAryabhata (476–550) described a geocentric model with slow and fast epicycles B[edit] Ja'far ibn Muhammad Abu Ma'shar al-Balkhi (787–886) conveyed Aristotle's theories from Persia to EuropeJames M.
C[edit] Bernard J. D[edit] E[edit] F[edit] G[edit] Physical cosmology. Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its formation, evolution, and ultimate fate.[1] For most of human history, it was a branch of metaphysics and religion. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws. Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the Universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding.
Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. With. Infinite divisibility. In philosophy[edit] Zeno questioned how an arrow can move if at one moment it is here and motionless and at a later moment be somewhere else and motionless, like a motion picture. Zeno's reasoning, however, is fallacious, when he says that if everything when it occupies an equal space is at rest, and if that which is in locomotion is always occupying such a space at any moment, the flying arrow is therefore motionless. This is false, for time is not composed of indivisible moments any more than any other magnitude is composed of indivisibles.[1] In reference to Zeno's paradox of the arrow in flight, Alfred North Whitehead writes that "an infinite number of acts of becoming may take place in a finite time if each subsequent act is smaller in a convergent series":[2] In physics[edit] Until the discovery of quantum mechanics, no distinction was made between the question of whether matter is infinitely divisible and the question of whether matter can be cut into smaller parts ad infinitum.
Through the Wormhole / Season 1.