Yahoo Web Search

  1. About 1,400,000 search results
  1. People also ask

    How many people understand general relativity?

    What are the prerequisites to studying general relativity?

    Is general relativity the best theory to explain gravity?

    How to understand general relativity?

  2. General Relativity explained like you've never seen before Sound On For 100 years, the general theory of relativity has been a pillar of modern physics. The basic idea is so elegant that you don’t...

  3. Jun 09, 2021 · Proposed in 1916, Einstein’s general theory of relativity explained that gravity was a special force that existed because of the curvature of space-time itself. Space-time, according to this theory, is not flat. Thus, orbiting bodies travel in geodesics—the shortest distance between two points. This is the nearest thing to a straight line.

  4. General relativity is a metric theory of gravitation. At its core are Einstein's equations, which describe the relation between the geometry of a four-dimensional pseudo-Riemannian manifold representing spacetime, and the energy–momentum contained in that spacetime. [44]

  5. The general theory of relativity (or general relativity for short) is a major building block of modern physics. It explains gravity based on the way space can 'curve', or, to put it more accurately, it associates the force of gravity with the changing geometry of space-time. History of general relativity

    • How Does General Relativity Work?
    • Gravitational Lensing
    • Changes in Mercury's Orbit
    • Frame-Dragging of Space-Time Around Rotating Bodies
    • Gravitational Redshift
    • Gravitational Waves
    • Observing Neutron Stars
    • Additional Resources

    To understand general relativity, first, let's start with gravity, the force of attraction that two objects exert on one another. Sir Isaac Newton quantified gravity in the same text in which he formulated his three laws of motion, the "Principia." The gravitational force tugging between two bodies depends on how massive each one is and how far apa...

    Light bends around a massive object, such as a black hole, causing it to act as a lensfor the things that lie behind it. Astronomers routinely use this method to study stars and galaxies behind massive objects. The Einstein Cross, a quasar in the Pegasus constellation, according to the European Space Agency(opens in new tab) (ESA), and is an excell...

    The orbit of Mercury is shifting very gradually over time due to the curvature of space-time around the massive sun, according to NASA(opens in new tab). As the closest planet to the sun, Mercury’s perihelion (the point along its orbit that it’s closest to the sun) is predicted to follow a slightly different direction over time. Under Newton’s pred...

    The spin of a heavy object, such as Earth, should twist and distort the space-time around it. In 2004, NASA launched the Gravity Probe B (GP-B). The axes of the satellite's precisely calibrated gyroscopes drifted very slightly over time, according to NASA(opens in new tab), a result that matched Einstein's theory. "Imagine the Earth as if it were i...

    The electromagnetic radiation of an object is stretched out slightly inside a gravitational field. Think of the sound waves that emanate from a siren on an emergency vehicle; as the vehicle moves toward an observer, sound waves are compressed, but as it moves away, they are stretched out, or redshifted. Known as the Doppler Effect, the same phenome...

    Einstein predicted that violent events, such as the collision of two black holes, create ripples in space-time known as gravitational waves. And in 2016, the Laser Interferometer Gravitational Wave Observatory (LIGO) announced that it had detected such a signal for the first time. That detection came on Sept. 14, 2015. LIGO, made up of twin facilit...

    In 2021 research published in the journal Physical Review X(opens in new tab), challenged several of Einstein's predictions by observing a double-pulsar system around 2,400 light-years from Earth. Each of the seven predictions of general relativity was confirmed by the study. Pulsarsare a type of neutron star that appears to pulse due to beams of e...

    Relativity: The Special and the General Theory - 100th Anniversary Edition(opens in new tab)
    The Nature of Space and Time (Isaac Newton Institute Series of Lectures, 3) (opens in new tab)
    The Physics Book: Big Ideas Simply Explained(opens in new tab)
    • 2 min
    • Nola Taylor Tillman
  1. People also search for