Astronomy 205 - 30 Multiple Choice Questions

1. What happens when the gravity of a massive star is able to overcome neutron degeneracy pressure? a) The core contracts and becoms a white dwarf. b) Gravity is not able to over come neutron degeneracy pressure. c) The core contracts and becomes a black hole. d) The star explodes violently, leaving nothing behind. e) The core contracts and becomes a ball of neutrons. 30. According to Hubble's Law, if a galaxy shows us twice another's red shift... a) it must be twice as bright as the other galaxy. b) its rotation is twice as fast, so the Tully-Fisher mass is twice as great. c) the first galaxy is twice as far away as the second. d) the first galaxy is half as far away as the seco... click for more

earth center hyposthesis/sun center hypothesis

How can planet retrograde motion be explained by the Earth center hypothesis? By the Sun-center hypothesis? (In about 75 words)

Earth's Roation; Mass at the Equator vs. Mass at the Pole; Temperature in Altitude

1.If the earth's rotation continues to slow at its present rate, how long will it take for the day to lengthen by 1 hour? 2.If a person weighed 200 pounds at the South Pole, what would he or she weigh at the equator? How would the person's mass at the equator compare to his or her mass at the Pole? 3.How much colder is it likely to be at the top of a 6000 meter mountain than it is at the bottom?

wave length of a radio wave; estimate the temperature of the planet

1. Use figure 6.5 to find the wave length of a radio wave with a frequency of 106 Hz 2. Suppose there were a planet between Mars and Jupiter at a distance of 4 AU from the Sun. Use Figure 7.8 to estimate the temperature of the planet.

Astronomy

1.What are two advantages of using CCD's as opposed to photography?