A binary pulsar is a pulsar with a binary companion, often another pulsar, white dwarf or neutron star. They are one of the few objects which allow physicists to test general relativity in the case of a strong gravitational field. Although the binary companion to the pulsar is usually difficult or impossible to observe, the timing of the pulses from the pulsar can be measured with extraordinary accuracy at radio telescopes. A relatively simple 10-parameter model incorporating information about the pulsar timing, the Keplerian orbits and three post-Keplerian corrections (the rate of periastron advance, a factor for gravitational redshift and a rate of change of the orbital period from gravitational radiation) is sufficient to completely model the pulsar timing. Binary pulsar timing has thus indirectly confirmed the existence of gravitational radiation and verified Einstein's general theory of relativity in a previously unknown regime. Composite Optical/X-ray image of the Crab Nebula pulsar, showing surrounding nebular gases stirred by the pulsars magnetic field and radiation. ... Artists impression of a binary system consisting of a black hole, with an accretion disc around it, and a main sequence star. ... Composite Optical/X-ray image of the Crab Nebula pulsar, showing surrounding nebular gases stirred by the pulsars magnetic field and radiation. ... Image of Sirius A and Sirius B taken by the Hubble Space Telescope. ... A neutron star is one of the few possible endpoints of stellar evolution. ... General relativity (GR) is the geometrical theory of gravitation published by Albert Einstein in 1915. ... The 64 metre radio telescope at Parkes Observatory The Very Large Array, an interferometric array formed from many smaller telescopes, like many larger radio telescopes. ... Johannes Keplers primary contributions to astronomy/ astrophysics were the three laws of planetary motion. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... This article is in need of attention from an expert on the subject. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Einstein redirects here. ...

The first binary pulsar, PSR 1913+16 or the "Hulse-Taylor binary pulsar" was discovered in 1974 at Arecibo by Joseph Hooton Taylor, Jr. and Russell Hulse, for which they won the 1993 Nobel Prize in Physics. Pulses from this system have been tracked, without glitches, to within 15 μs since its discovery. PSR B1913+16 is a pulsar in a binary star system, in orbit with another star around a common center of mass. ... The Arecibo Observatory is located approximately 9 miles south-southwest from Arecibo, Puerto Rico (near the extreme southwestern corner of Arecibo pueblo). ... Joseph H. Taylor, Jr. ... Russell Alan Hulse (born November 28, 1950) is an American physicist and winner of the Nobel Prize in Physics, shared with his thesis advisor Joseph Hooton Taylor Jr. ... Hannes Alfvén (1908–1995) accepting the Nobel Prize for his work on magnetohydrodynamics [1]. List of Nobel Prize laureates in Physics from 1901 to the present day. ... To help compare orders of magnitude of different times this page lists times between 10−6 seconds and 10−5 seconds (1. ...

• D. Lorimer (1998). "Binary and millisecond pulsars". Living Rev. Relativity 1: 10.
• C. Will (2001). "The confrontation between general relativity and experiment". Living Rev. Relativity 4: 4.