General relativityTheory of gravitation as curved spacetime Slow motion computer simulation of the black hole binary system GW150914, during 0.33 s of its final inspiral, merge, and ringdown. The star field behind the black holes is being heavily distorted and appears to rotate and move, due to extreme gravitational lensing, as spacetime itself is distorted and dragged around by the rotating black holes.
Special relativityTheory of interwoven space and time by Albert EinsteinAlbert Einstein around 1905, the year his paper on special relativity was publishedIn physics, the special theory of relativity, or simply special relativity, is a scientific theory of the relationship between space and time.
Relativity of simultaneityIn physics, the relativity of simultaneity is the concept that distant – whether two spatially separated events occur at the same time – is not absolute, but depends on the observer's reference frame. This possibility was raised by mathematician Henri Poincaré in 1900, and thereafter became a central idea in the special theory of relativity.
Age of the universeIn Big Bang models of physical cosmology, the age of the universe is the cosmological time back to the point when the scale factor of the universe extrapolates to zero. Using the latest models and the data from the Planck project, the age of the universe is 13.8 billion years. Astronomers have two different approaches to determine the age of the universe.
Minkowski spacetimeMathematical description of spacetime used in relativityHermann Minkowski (1864–1909) found that the theory of special relativity could be best understood as a four-dimensional space, since known as the Minkowski spacetime.In physics, Minkowski spacetime (or Minkowski space; ) is the main mathematical description of spacetime in the absence of gravitation. It combines inertialspace and timemanifolds into a four-dimensional model.
Physical cosmologyBranch of physics that studies mathematical models of the universeArtist conception of the Big Bang cosmological model, the most widely accepted out of all in physical cosmology (neither time nor size to scale)
Albert EinsteinPersonalHousePolitical viewsReligious viewsFamilyBrainBlackboardRefrigeratorOppenheimer relationshipPhysicsGeneral relativityMass–energy equivalenceBrownian motionPhotoelectric effectWorksArchivesScientific publicationsAnnus Mirabilis papers (1905)"Investigations on the Theory ofBrownian Movement" (1905)Relativity: The Special andthe General Theory (1916)The World as I See It (1934)"Why Socialism?"
Big BangThe Big Bang is a physical theory that describes how the universe expanded from an early state of high density and temperature. Various cosmological models based on the Big Bang concept explain a broad range of phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, the redshift of galaxies and the large-scale structure of the universe.
Hermann WeylHermann Klaus Hugo Weyl ( ; German:; 9 November 1885 – 8 December 1955) was a German mathematician, theoretical physicist, logician and philosopher. Although much of his working life was spent in Zürich, Switzerland, and then Princeton, New Jersey, he is associated with the University of Göttingen tradition of mathematics, represented by Carl Friedrich Gauss, David Hilbert and Hermann Minkowski.
Coordinate systemIn geometry, a coordinate system is a system that uses one or more numbers, or coordinates, to uniquely determine and standardize the position of the points or other geometric elements on a manifold such as Euclidean space. The coordinates are not interchangeable; they are commonly distinguished by their position in an ordered tuple, or by a label, such as in "the x-coordinate".
TimeContinuous progression from past to futureNot to be confused with Thyme.Time is the continuous progression of existence that occurs in an apparently irreversible succession from the past, through the present, and into the future.
GeodesicIn geometry, a geodesic () is a curve representing in some sense the locally shortest path (arc) between two points in a surface, or more generally in a Riemannian manifold. The term also has meaning in any differentiable manifold with a connection. It is a generalization of the notion of a "straight line".*As an Amazon Associate I earn from qualifying purchases.