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Radio Astronomy

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Author Topic: Radio Astronomy  (Read 91 times)
Jennie McGrath
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« Reply #15 on: August 16, 2007, 11:13:19 pm »

Astronomical sources

Radio astronomy has led to substantial increases in astronomical knowledge, particularly with the discovery of several classes of new objects, including pulsars, quasars and radio galaxies. This is because radio astronomy allows us to see things that are not detectable in optical astronomy. Such objects represent some of the most extreme and energetic physical processes in the universe.

Radio astronomy is also partly responsible for the idea that dark matter is an important component of our universe; radio measurements of the rotation of galaxies suggest that there is much more mass in galaxies than has been directly observed. The cosmic microwave background radiation was also first detected using radio telescopes. However, radio telescopes have also been used to investigate objects much closer to home, including observations of the Sun and solar activity, and radar mapping of the planets.

Other sources include:

Active galactic nuclei and pulsars have jets of charged particles which emit synchrotron radiation
Merging galaxy clusters often show diffuse radio emission
Supernova remnants can also show diffuse radio emission
The Cosmic microwave background is blackbody radio emissio
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