It was _ in the Galactic disk that threw Herschel's model of the size and structure of the Galaxy off badly.
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Q96: The radio source is located in a
Q97: What two observations allow us to calculate
Q98: Harvard woman astronomer discovered the period- luminosity
Q99: What use are 21- cm radio waves
Q100: Most of the mass of the Milky
Q102: Virtually the entire disk of the Galaxy
Q103: Variable stars are ones whose changes over
Q104: The presence of planets orbiting it shows
Q105: All globular cluster stars belong to Population
Q106: Optically mapping the Milky Way is made
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