Isp 205 exam - Study guides, Class notes & Summaries

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Describe the major patterns we find among objects orbiting the Sun. Ans- -Terrestrial planets: rocky planets -Jovian Planets: gaseous planets -Asteroid belt between Mars and Jupiter -Kuiper belt past Neptune full of ice balls and comets -Dwarf planets orbit past Neptune -All rotate counterclockwise Predict how the temperature of an opaque gas cloud will change as the cloud shrinks Ans- As it shrinks its temperature will increase (conservation of energy) Explain how the nebular theory ...

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he Andromeda Galaxy is faintly visible to the naked eye in the constellation Andromeda. Suppose instead it were located in the same direction in space as the center of the Milky Way Galaxy (but still at its current distance). How would it appear to the eye in that case? a) It would be much brighter because it would be illuminated by the many stars in the center of our galaxy. b)It would look about the same, but it would be harder to pick out because its cloud-like appearance would ma...

The Andromeda Galaxy is faintly visible to the naked eye in the constellation Andromeda. Suppose instead it were located in the same direction in space as the center of the Milky Way Galaxy (but still at its current distance). How would it appear to the eye in that case? a) It would be much brighter because it would be illuminated by the many stars in the center of our galaxy. b)It would look about the same, but it would be harder to pick out because its cloud-like appearance would m...

Which two factors primarily determine the characteristics of a star? Ans- its mass and its stage of life Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore... Ans- both stars have the same luminosity, but the apparent brightness of Star B is four times that of Star A Which of the following statements about spectral types of stars is not generally true? Ans- The spectral type of a star can be used to determine its distance. Sirius is a star ...

Explain why we see objects at great distances as they were in the distant past Ans- -The universe is constantly expanding -an observer in any galaxy sees more distant galaxies moving away faster -Distances and speeds help determine the universe is expanding Summarize the major cosmic events that prepared the way for life on Earth Ans- -Big Bang created matter -Gravity pulled that matter together to form galaxies -Galaxies created stars alongside nuclear fusion -Stars created elements nec...

How does the hypothesis of inflation account for the existence of the "seeds" of density from which galaxies and other large structures formed? Ans- Inflation would have caused random, microscopic quantum fluctuations to grow so large in size that they became the seeds of structure. Why do virtually all the galaxies in the universe appear to be moving away from our own? Ans- Expansion causes all galaxies to move away from nearly all others. Suppose we observe a Cepheid variable in a ...

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