Reading Review Chapter 15

Reading Review Chapter 15 - Reading Review Chapter 15 Basic...

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Reading Review Chapter 15 Basic Skills/ Definitions Quiz A: Based on the number of gravities visible in the Hubble Deep Field, the number of galaxies in our observable universe is estimated to be somewhere around: 100 billion. B: Which of the following is NOT one of the three major categories of galaxies? Globular galaxies C: A standard candle is: Light source of known luminosity D: What is main-sequence fitting? A method for determining the distance to a star cluster by assuming that its main sequence should line up with the main sequence on a standard H-R diagram. E. What is a Cepheid variable? A type of very luminous star that makes an excellent standard candle. F: What two properties of a Cepheid variable are directly related to one another? The period between its peaks of brightness and its luminosity G: What does Hubble’s law tell us? The more distant a galaxy, the faster it is moving away from us. H:
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This note was uploaded on 04/03/2008 for the course ISP 205 taught by Professor Donahue during the Fall '08 term at Michigan State University.

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Reading Review Chapter 15 - Reading Review Chapter 15 Basic...

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