Start Date

4-1981 8:00 AM

Description

Atmospheric extinction, seeing, and "light pollution" £re the most significant factors affecting the quality of observations obtained from ground-based optical telescopes, degrading resolution and limiting reach. In addition, the earth's atmosphere is opaque to radiation shorter than 0.3 microns preventing the ultraviolet from being observed in detail from the ground. The solution to these problems has been to move astronomical telescopes into earth orbit. Initially these orbiting observatories carried instruments sensitive to ultraviolet and higher energy radiation since it was otherwise unobservable. The success of the first series of these orbiting observatories, the Orbiting Astronomical Observatories (OAO), established these satellites as one of a new generation of tools for exploring the universe. Another orbiting observatory, the International Ultraviolet Explorer (IUE), is unique among the current orbiting observatories in that it is in a geosynchronous orbit and provides a guest observer facility serving the international community. IUE has had a significant impact on observational astronomy. Nearly 10 percent of all observational papers published JLi the Astrophysical Journal in 1980 reported or used observations made by IUE. The figure for all astronomical satellites is about 3 times higher and continues to rise. With the orbiting of the Space Telescope in the mid 1980s by the Space Shuttle, observational astronomy will enter a new era. For the first time, astronomers will have access to a large (2.4 meter) high-resolution telescope unhindered by the earth f s atmosphere. With the potential such an instrument offers, there is little doubt that the near future will see a large fraction of observational astronomy performed from orbiting observatories,

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Apr 1st, 8:00 AM

Optical Astronomy from Orbiting Observatories

Atmospheric extinction, seeing, and "light pollution" £re the most significant factors affecting the quality of observations obtained from ground-based optical telescopes, degrading resolution and limiting reach. In addition, the earth's atmosphere is opaque to radiation shorter than 0.3 microns preventing the ultraviolet from being observed in detail from the ground. The solution to these problems has been to move astronomical telescopes into earth orbit. Initially these orbiting observatories carried instruments sensitive to ultraviolet and higher energy radiation since it was otherwise unobservable. The success of the first series of these orbiting observatories, the Orbiting Astronomical Observatories (OAO), established these satellites as one of a new generation of tools for exploring the universe. Another orbiting observatory, the International Ultraviolet Explorer (IUE), is unique among the current orbiting observatories in that it is in a geosynchronous orbit and provides a guest observer facility serving the international community. IUE has had a significant impact on observational astronomy. Nearly 10 percent of all observational papers published JLi the Astrophysical Journal in 1980 reported or used observations made by IUE. The figure for all astronomical satellites is about 3 times higher and continues to rise. With the orbiting of the Space Telescope in the mid 1980s by the Space Shuttle, observational astronomy will enter a new era. For the first time, astronomers will have access to a large (2.4 meter) high-resolution telescope unhindered by the earth f s atmosphere. With the potential such an instrument offers, there is little doubt that the near future will see a large fraction of observational astronomy performed from orbiting observatories,

 

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