Space Telescopes and Astronomy Physics 113 Goderya Chapter(s): 6 Learning Outcomes:

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Presentation transcript:

Space Telescopes and Astronomy Physics 113 Goderya Chapter(s): 6 Learning Outcomes:

Space Astronomy

The Hubble Space Telescope Avoids turbulence in the Earth’s atmosphere Extends imaging and spectroscopy to (invisible) infrared and ultraviolet Launched in 1990; maintained and upgraded by several space shuttle service missions throughout the 1990s and early 2000’s

NASA’s Space Infrared Telescope Facility (SIRTF)

Infrared Astronomy However, from high mountain tops or high- flying air planes, some infrared radiation can still be observed. NASA infrared telescope on Mauna Kea, Hawaii Most infrared radiation is absorbed in the lower atmosphere.

Ultraviolet Astronomy Ultraviolet radiation with < 290 nm is completely absorbed in the ozone layer of the atmosphere. Ultraviolet astronomy has to be done from satellites. Several successful ultraviolet astronomy satellites: IRAS, IUE, EUVE, FUSE Ultraviolet radiation traces hot (tens of thousands of degrees), moderately ionized gas in the Universe.

X-Ray Astronomy X-rays are completely absorbed in the atmosphere. X-ray astronomy has to be done from satellites. NASA’s Chandra X-ray Observatory X-rays trace hot (million degrees), highly ionized gas in the Universe.

Gamma-Ray Astronomy Gamma-rays: most energetic electromagnetic radiation; traces the most violent processes in the Universe The Compton Gamma-Ray Observatory