A space-telescope able to see the planets and even the satellites around the nearest stars

Details A space-telescope able to see the planets and even the satellites around the nearest stars A space-telescope able to see the planets and even the satellites around the nearest stars

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983buda.iafcq....m&link_type=abstract

International Astronautical Federation, International Astronautical Congress, 34th, Budapest, Hungary, Oct. 10-15, 1983. 8 p.

Physics

Optics

Coronagraphs, Extrasolar Planets, Hubble Space Telescope, Diffraction Limited Cameras, Gratings (Spectra), Space Commercialization

Scientific paper

The possibility that a coronograph on the Space Telescope when it is launched into a 500 km orbit in 1986 could aid in locating planets in other star systems is examined. Attention is given to the view of the solar system from Alpha Centauri; it is shown that even Jupiter would be a 21.9 magnitude object at that distance. However, the optics of the Space Telescope will only permit objects down to 17th magnitude to be viewed near a bright object such as a star. Consideration is given to the efficiency of a coronograph, which increases with the distance from the image. The diffraction of a light beam passing through a hole is analyzed and shown to be complementary to the effect of a screen in the same place if it is the same shape. The analyses are used to study methods for selectively viewing different wavelengths emitted from a star system through a star-shaped screen in order to discern outer planets. The technique is valid only if the Space Telescope is placed in an orbit of several millions of miles around the sun.

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