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  2. Gravitational lens - Wikipedia

    en.wikipedia.org/wiki/Gravitational_lens

    A light source passes behind a gravitational lens (invisible point mass placed in the center of the image). The aqua circle is the light source as it would be seen if there were no lens, while white spots are the multiple images of the source (see Einstein ring).

  3. Speed of gravity - Wikipedia

    en.wikipedia.org/wiki/Speed_of_gravity

    Two gravitoelectrically interacting particle ensembles, e.g., two planets or stars moving at constant velocity with respect to each other, each feel a force toward the instantaneous position of the other body without a speed-of-light delay because Lorentz invariance demands that what a moving body in a static field sees and what a moving body ...

  4. Introduction to general relativity - Wikipedia

    en.wikipedia.org/wiki/Introduction_to_general...

    The equivalence between gravitational and inertial effects does not constitute a complete theory of gravity. When it comes to explaining gravity near our own location on the Earth's surface, noting that our reference frame is not in free fall, so that fictitious forces are to be expected, provides a suitable explanation. But a freely falling ...

  5. Gravitoelectromagnetism - Wikipedia

    en.wikipedia.org/wiki/Gravitoelectromagnetism

    Diagram regarding the confirmation of gravitomagnetism by Gravity Probe B. Gravitoelectromagnetism, abbreviated GEM, refers to a set of formal analogies between the equations for electromagnetism and relativistic gravitation; specifically: between Maxwell's field equations and an approximation, valid under certain conditions, to the Einstein field equations for general relativity.

  6. This Is Extraordinary: Gravity Can Create Light, All on Its Own

    www.aol.com/lifestyle/extraordinary-gravity...

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  7. Gravitational redshift - Wikipedia

    en.wikipedia.org/wiki/Gravitational_redshift

    The gravitational weakening of light from high-gravity stars was predicted by John Michell in 1783 and Pierre-Simon Laplace in 1796, using Isaac Newton's concept of light corpuscles (see: emission theory) and who predicted that some stars would have a gravity so strong that light would not be able to escape.

  8. Radiation pressure - Wikipedia

    en.wikipedia.org/wiki/Radiation_pressure

    Therefore, the absorption of this radiation leads to a force with a component against the direction of movement. (The angle of aberration is tiny, since the radiation is moving at the speed of light, while the dust grain is moving many orders of magnitude slower than that.) The result is a gradual spiral of dust grains into the Sun.

  9. Why is wet bulb globe temperature more useful than heat ... - AOL

    www.aol.com/why-wet-bulb-globe-temperature...

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