History of Astronomy and Astrophysics

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	Revision 79 . . December 12, 2001 9:33 am by (logged).46.3.xxx
	Revision 78 . . (edit) December 11, 2001 5:52 am by (logged).30.135.xxx *[spelling]**
	Revision 77 . . (edit) December 10, 2001 4:05 pm by AstroNomer [typo]
	Revision 76 . . (edit) December 1, 2001 10:26 pm by (logged).205.8.xxx
	Revision 75 . . (edit) November 28, 2001 12:53 pm by (logged).12.65.xxx
	Revision 74 . . November 26, 2001 9:08 pm by (logged).152.145.xxx
	Revision 73 . . November 26, 2001 9:06 pm by (logged).152.145.xxx
	Revision 72 . . November 26, 2001 10:57 am by Paul Drye
	Revision 71 . . November 26, 2001 10:56 am by Chenyu *[reverting]**
	Revision 70 . . November 26, 2001 10:34 am by (logged).10.163.xxx
	Revision 69 . . (edit) November 25, 2001 4:16 am by Bryan Derksen
	Revision 68 . . November 25, 2001 3:41 am by (logged).98.151.xxx [LANL is e-Print, not preprint archive]
	Revision 67 . . (edit) November 25, 2001 3:09 am by Wayne Hardman [Just corrected some minor spellings.]
	Revision 66 . . (edit) November 24, 2001 9:22 am by Wayne Hardman
	Revision 65 . . November 23, 2001 1:20 pm by Chenyu
	Revision 64 . . November 21, 2001 12:32 am by Chenyu
	Revision 63 . . November 20, 2001 2:39 pm by Chenyu
	Revision 62 . . November 20, 2001 2:27 pm by Chenyu
	Revision 61 . . November 20, 2001 2:22 pm by Chenyu
	Revision 60 . . (edit) November 14, 2001 6:28 am by AxelBoldt

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Changed: 47,48c47,48

*[Infrared Astronomy]? deals with using infrared light (wavelenghts longer than the red). Again, the most common tool is the telescope, but at longer wavelengths. Space telescopes are also used to eliminate noise from the atmosphere.
*[Radio Astronomy]? uses completely different techniques: to detect radiation of wavelengths of mm to cm, the receivers are similar to those used in radio broadcast transmission (which uses those wavelengths of radiation). See also [Radio Telescope]?s.

*[Infrared Astronomy]? deals with using infrared radiation (wavelengths longer than the red light). Again, the most common tool is the telescope, but at longer wavelengths. Space telescopes are also used to eliminate noise ( electromagnetic interference) from the atmosphere.
*[Radio Astronomy]? uses completely different instruments to detect radiation of wavelengths of mm to cm. The receivers are similar to those used in radio broadcast transmission (which uses those wavelengths of radiation). See also [Radio Telescope]?s.