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How is the mass of the Galaxy estimated?
Q1: From the North Pole,<br>A) only stars within
Q30: The Galaxy rotates like a solid disk,like
Q44: Earth's shadow falling on the Moon is
Q56: Stars in the disk of the Galaxy
Q58: A particular reflecting telescope has an objective
Q72: Pairs of jets carrying material and radiation
Q82: At what approximate time will the new
Q88: X-ray bursters are objects in the sky
Q95: In reference to black holes,a singularity is<br>A)
Q96: A barred spiral galaxy has young,hot,blue stars