AST1002 EXAM 1 FINAL PAPER PRACTICE
SOLUTION TESTED QUESTIONS WITH
COMPLETE ANSWERS
●● c = 3 x 10^5; the moon is 400,000km away. How long would it take
a radar signal from Earth to reach the moon?
Answer: 1.3 seconds (distance/speed)
●● 35,000 in scientific notation
Answer: 3.5 x 10^4
●● Divide 8 x10^80 by 2 x 10^40
Answer: 4 x 10^40
●● What does angular size of an object depend on?
Answer: True physical size divided by distance
●● Suppose you measure the angular size of an object that you think is
10 feet in width and located 100 feet away from you. You later discover
that the object is actually 20 feet in width and that it was located 200 feet
away from you. How should you modify your conclusion about its
angular size, based on this information?
Answer: Both situations result in the same angular size
, ●● What do we mean by the ZENITH?
Answer: The direction directly above you.
●● At the Earth's equator, you could see:
Answer: All of the Earth's sky at some point during the year.
●● You are kidnapped, drugged, and flown somewhere. After an
indefinite time in a dark cell, you escape and try to determine from the
sky where you are and what time of year it is. What could you say about
your location on Earth if you find the North Pole Star Polaris and
estimate its altitude to be 70 degrees above the north horizon.
Answer: You are 70 degrees north of the equator.
●● The celestial equator refers to what?
Answer: The great circle on the sky that would result from extending the
plane of the Earth's equator out to the celestial sphere.
●● Consider an observer at the equator. The Sun will be at its highest
point above the horizon at noon on what day?
Answer: On either equinox.
●● When does the Sun reach its maximum altitude in the sky for an
observer south of latitude 23.5 degrees south?
SOLUTION TESTED QUESTIONS WITH
COMPLETE ANSWERS
●● c = 3 x 10^5; the moon is 400,000km away. How long would it take
a radar signal from Earth to reach the moon?
Answer: 1.3 seconds (distance/speed)
●● 35,000 in scientific notation
Answer: 3.5 x 10^4
●● Divide 8 x10^80 by 2 x 10^40
Answer: 4 x 10^40
●● What does angular size of an object depend on?
Answer: True physical size divided by distance
●● Suppose you measure the angular size of an object that you think is
10 feet in width and located 100 feet away from you. You later discover
that the object is actually 20 feet in width and that it was located 200 feet
away from you. How should you modify your conclusion about its
angular size, based on this information?
Answer: Both situations result in the same angular size
, ●● What do we mean by the ZENITH?
Answer: The direction directly above you.
●● At the Earth's equator, you could see:
Answer: All of the Earth's sky at some point during the year.
●● You are kidnapped, drugged, and flown somewhere. After an
indefinite time in a dark cell, you escape and try to determine from the
sky where you are and what time of year it is. What could you say about
your location on Earth if you find the North Pole Star Polaris and
estimate its altitude to be 70 degrees above the north horizon.
Answer: You are 70 degrees north of the equator.
●● The celestial equator refers to what?
Answer: The great circle on the sky that would result from extending the
plane of the Earth's equator out to the celestial sphere.
●● Consider an observer at the equator. The Sun will be at its highest
point above the horizon at noon on what day?
Answer: On either equinox.
●● When does the Sun reach its maximum altitude in the sky for an
observer south of latitude 23.5 degrees south?
