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from:   1999 ApJ, 525C, p.735
title:  GALACTIC STRUCTURE AND THE STELLAR LUMINOSITY FUNCTION
author: MAARTEN SCHMIDT


....(略)

McCuskey's study was to be the last largescale survey based on star counts
in the galactic plane carried out in this century.

Almost all subsequent work on star counts was directed at intermediate or
high galactic latitudes to avoid the strong interstellar absorption in the
galactic plane.

....(略)


想請教，

 1. McCuskey的研究被指為上世紀末最後的大尺度恆星計數，在1947～1956年間，
    那之後的研究或觀測(Hipparcos..等)不算是大尺度的恆星計數？

 2. "to avoid the strong interstellar absorption" 這句話是什麼意思呢？




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