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Consider the following statements regarding Galactic Halo:
  1. Galactic halo is dominated by invisible dark matter.
  2. Majority of a galaxy’s stellar mass resides in its halo.
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    2 only
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements regarding Galactic Halo: Galactic ha...
Astronomers have recently detected in the stellar halo that represents the Milky Way's outer limits a group of stars more distant from Earth than any known within our own galaxy - almost halfway to a neighboring galaxy. What is a Galactic halo?
  • Galactic halo is a nearly spherical volume of thinly scattered stars, globular clusters of stars, and tenuous gas observed surrounding spiral galaxies, including the Milky Way.
  • Galactic halo is dominated by invisible dark matter, whose presence is only measurable through the gravity that it exerts.
  • Only about 1% of a galaxy’s stellar mass resides in its halo, and due to this low luminosity, the observation of halos in other galaxies is extremely difficult.
Hence only statement 1 is correct.
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Consider the following statements regarding Galactic Halo: Galactic halo is dominated by invisible dark matter. Majority of a galaxy’s stellar mass resides in its halo.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?
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