Astronomical Instrumentation
Current approaches to achieving either high resolution or high
contrast in astronomical observations typically depend on making
the telescope your looking with bigger. The bigger the telescope,
the finer the detail one can resolve, and the greater one's
ability to study dim sources near bright ones. Starkman and Copi
have developed a new approach -- steerable occulting satellites --
where one interposes a large opaque mask between the source and
the telescope. Contrast is obtained by blocking bright sources to
study dim ones. Resolution is improved by slowly moving the
occulter across the field -- the amount of light one collects as a
function of time can then be interpreted in terms of the spatial
structure of the source.
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The future Constellation-X, an array of satellites
for x-ray astronomy that is due to be lauched in 2011.
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