Tag: life cycle of stars

Questions Related to life cycle of stars

Who observed galaxies moving away from us?

physics life cycle of stars movement of the earth properties of stars types of galaxies

  1. Georges Lemaitre

  2. Arno Penzias

  3. Edwin Hubble

  4. Robert Wilson

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Correct Option: C
Explanation:

He was the Edwin Hubble in 1929 he identified the relationship between a galaxy distance and speed with which it is moving.

The red shift in the spectral lines of light reaching us from other galaxies implies that these galaxies:

physics life cycle of stars movement of the earth properties of stars types of galaxies

  1. are moving closer to one another

  2. are moving farther apart from one another

  3. consist predominantly of red giant stars

  4. are in rapid rotation

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Correct Option: B
Explanation:

The red shift occurs due to increase due to increase in wavelength that would be due to the increasing distance between two galaxies, Red shift indicate that galaxy are mainly farther apart from one another

Evidence of various kinds suggests that at the center of our galaxy is a:

physics life cycle of stars movement of the earth properties of stars types of galaxies

  1. quasar

  2. pulsar

  3. neutron star

  4. black hole

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Correct Option: D
Explanation:

Evidence of various kinds suggests that at the center of our galaxy is a black hole.