How Our Galaxy Was Discovered


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question 1 of 3

Variable stars with a period of pulsation of 12 to 24 hours are called:

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1. Who proved that the sun is not at the center of the Milky Way Galaxy?

2. This is a region of the H-R diagram where pulsating variable stars are located, such as Cepheid variable and RR Lyrae stars

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About This Quiz & Worksheet

While it might seem strange now, for most of human history nobody knew that we live in a giant galaxy that we call the Milky Way. You can learn more about how our galaxy was discovered with this quiz/worksheet combo. At the end of the lesson, you'll be tested on things such as the different types of stars and important figures in the discovery of the galaxy.

Quiz & Worksheet Goals

In this quiz and worksheet you'll be tested on:

  • Variable stars with a period of pulsation of 12 to 24 hours
  • Discoverer of the sun's relationship to the Milky Way Galaxy
  • Location of pulsating variable stars in the H-R diagram
  • Variable star with pulsation between 1 and 60 days
  • Relationship between a variable star's period of pulsation and its brightness

Skills Practiced

  • Information recall - access the knowledge you've gained on how our galaxy was discovered
  • Reading comprehension - make sure you can understand important moments in the discovery of our galaxy, and the scientific principles that allowed it to happen
  • Knowledge application - Apply your understanding of the qualities of different types of stars to questions about how scientists used these qualities to understand our galaxy

Additional Learning

To learn more about how the Milky Way was discovered, review the corresponding lesson on How Our Galaxy Was Discovered. This lesson covers the following topics:

  • The early concepts of the Universe
  • Important discoveries
  • Modern observations
  • Variable Stars and their periods of pulsation