Difference between revisions of "Hubble Space Telescope"

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The spacecraft provides an order of magnitude better resolution than is capable from ground-based telescopes. The objectives of the HST are to:
 
The spacecraft provides an order of magnitude better resolution than is capable from ground-based telescopes. The objectives of the HST are to:
  
1) Investigate the composition, physical characteristics, and dynamics of celestial bodies;  
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# Investigate the composition, physical characteristics, and dynamics of celestial bodies;  
2) Examine the formation, structure, and evolution of stars and galaxies;  
+
# Examine the formation, structure, and evolution of stars and galaxies;  
3) Study the history and evolution of the universe;  
+
# Study the history and evolution of the universe;  
4) Provide a long-term space-based research facility for optical astronomy.  
+
# Provide a long-term space-based research facility for optical astronomy.  
  
 
During initial on-orbit checkout of the Hubble's systems, a flaw in the telescope's main reflective mirror was found that prevented perfect focus of the incoming light.
 
During initial on-orbit checkout of the Hubble's systems, a flaw in the telescope's main reflective mirror was found that prevented perfect focus of the incoming light.
 
This flaw was caused by the incorrect adjustment of a testing device used in building the mirror.
 
This flaw was caused by the incorrect adjustment of a testing device used in building the mirror.
Fortunately, however, Hubble was designed for regular on-orbit maintenance by Shuttle missions. The first servicing mission, STS-61 in December 1993, fully corrected the problem by installing a corrective optics package and upgraded instruments (as well as replacing other satellite components). A second servicing mission, scheduled for March 1997, installed two new instruments in the observatory.
+
Fortunately, however, Hubble was designed for regular on-orbit maintenance by [[Space Shuttle]] missions. The first servicing mission, STS-61 in December 1993, fully corrected the problem by installing a corrective optics package and upgraded instruments (as well as replacing other satellite components). A second servicing mission, scheduled for March 1997, installed two new instruments in the observatory.
  
 
[[Category:Historic Spacecraft]]
 
[[Category:Historic Spacecraft]]

Revision as of 16:13, 3 August 2005

The Hubble Space Telescope is the visible/ultraviolet/near-infrared element of the Great Observatories astronomical program. The spacecraft provides an order of magnitude better resolution than is capable from ground-based telescopes. The objectives of the HST are to:

  1. Investigate the composition, physical characteristics, and dynamics of celestial bodies;
  2. Examine the formation, structure, and evolution of stars and galaxies;
  3. Study the history and evolution of the universe;
  4. Provide a long-term space-based research facility for optical astronomy.

During initial on-orbit checkout of the Hubble's systems, a flaw in the telescope's main reflective mirror was found that prevented perfect focus of the incoming light. This flaw was caused by the incorrect adjustment of a testing device used in building the mirror. Fortunately, however, Hubble was designed for regular on-orbit maintenance by Space Shuttle missions. The first servicing mission, STS-61 in December 1993, fully corrected the problem by installing a corrective optics package and upgraded instruments (as well as replacing other satellite components). A second servicing mission, scheduled for March 1997, installed two new instruments in the observatory.