Space, Time, and Aliens by Steven J. Dick

Author:Steven J. Dick
Language: eng
Format: epub
ISBN: 9783030416140
Publisher: Springer International Publishing

Even so, the history of astrometry is characterized by several sudden technological breakthroughs, followed by long periods of routine work with more minor modifications. Thus, through innovative instrumentation Tycho Brahe in the sixteenth century improved over the Greeks by more than a factor of ten. At the beginning of the nineteenth century techniques of precision dividing and reading of full circles (as opposed to sextants or quadrants) produced another order of magnitude jump. After that, a combination of painstaking modifications in technique and analysis (such as the moving wire micrometer and screens to dim the brightest stars) brought the errors still lower, until in the 1980s and 1990s the techniques of interferometry and spacecraft produced yet another order of magnitude jump.

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