Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982s%26t....63..334l&link_type=abstract
Sky and Telescope, vol. 63, Apr. 1982, p. 334-338.
Astronomy and Astrophysics
Astronomy
2
Astrometry, Interferometry, Research And Development, Stellar Spectrophotometry, Telescopes, France, Galaxies, Quasars, Rotating Spheres, Star Trackers, Systems Engineering
Scientific paper
Several stellar-interferometry projects are described. Consideration is given to the CERGA two-telescope interferometer (I2T) near Grasse in the Alps of southern France. The I2T consists of a pair of coude telescopes, each with an aperture of only 26 cm, which can be moved in a north-south direction on precision tracks. In addition, attention is given to the concept of a spherical telescope that is 'walked' through its motion on two 'feet'; a sphere rests on a rather simple mechanism that rotates the sphere in various ways to allow any type of stellar tracking. Finally, space interferometry is considered, which could make use of a greatly expanded imaging field, accurately measuring the angular separation of quasars and faint galaxies. The Flute concept, selected by ESA for assessment studies is discussed: Flute is a tube-shaped structure containing two telescopes which can be moved in front of various portholes to vary the baseline.
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