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Related Concept Videos

Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
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Kepler's Second Law of Planetary Motion

In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
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Kepler's Third Law of Planetary Motion01:18

Kepler's Third Law of Planetary Motion

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Bringing the Visible Universe into Focus with Robo-AO
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Pulsars in binary systems: probing binary stellar evolution and general relativity.

Ingrid H Stairs1

  • 1Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada. stairs@astro.ubc.ca

Science (New York, N.Y.)
|April 24, 2004
PubMed
Summary
This summary is machine-generated.

Millisecond radio pulsars in binary systems are precise cosmic clocks. Studying them reveals insights into binary evolution, neutron star masses, and tests theories of gravity.

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Area of Science:

  • * Astrophysics
  • * Gravitational Physics

Background:

  • * Millisecond radio pulsars in binary orbits exhibit rapid spin periods due to mass transfer.
  • * These pulsars serve as exceptionally stable and precise moving clocks.
  • * Binary pulsar timing data offers unique insights into astrophysical phenomena.

Purpose of the Study:

  • * To leverage binary pulsar timing for investigating astrophysical problems.
  • * To constrain models of binary evolution and neutron star populations.
  • * To test fundamental theories of gravity, including general relativity.

Main Methods:

  • * High-precision timing of radio pulsars in binary systems.
  • * Analysis of orbital parameters derived from pulsar timing data.
  • * Conducting surveys for new pulsars to discover novel binary systems.

Main Results:

  • * Orbital parameters provide constraints on binary evolution and pulsar populations.
  • * Neutron star masses are determined for systems with varied mass-transfer histories.
  • * Strong limits are placed on deviations from general relativity.
  • * Discovery of new binary systems, including highly relativistic double-pulsar systems.

Conclusions:

  • * Binary pulsars are invaluable tools for astrophysical research and fundamental physics.
  • * Continued surveys enhance our understanding of binary systems and their implications.
  • * The study of these systems can unveil new frontiers in physics.