RR Lyrae stars pulsate, but with shorter periods and lower luminosities than Cepheids.
Indicate whether the statement is true or false
Question 2Suppose you point your telescope at a distant object. Which of the following is not an advantage of taking a photograph of the object through the telescope as compared to just looking at the object through the telescope?
A) The photograph will have far better angular resolution than you can see with your eye.
B) By using a long exposure time, the photograph can allow you to see objects that would be too dim to see with your eye.
C) If taken with a camera with a sensitive detector such as a CCD, the photograph can capture a much larger percentage of the incoming photons than can your eye.
D) The photograph provides a more reliable record of what is seen through the telescope than can a drawing made by eye.
Question 3The Doppler radial velocity technique works best for
A) planets whose orbits are along are line of sight.
B) planets whose orbits are perpendicular to our line of sight.
C) planets whose orbits are nearly circular.
D) planets whose orbits are very eccentric.
Question 4Following a series of experiments in which you are flung against walls to test the resiliency of the human body, you are ejected from the ship and find yourself in a maelstrom.
Whipped by winds gusting at 10,000 km/hr, rising and falling in convective currents, you are not having a good time. On the rare occasions when you can assess your surroundings, you notice a horizon that seems to go on forever (or, at least, much farther than the horizon on Earth), and no solid surface anywhere. You get a glimpse of several large moons. The Sun races through your sky, requiring only about 5 hours to rise nearly due east, cross the meridian at an altitude of about 55 in the north, and then set due west.
Question 5When was the first confirmed exoplanet discovered?
A) Shortly after the invention of the telescope, in the early 1600s
B) In prehistoric times
C) Around 350 BC, by the Ancient Greeks
D) Early in the 21st century
E) Near the end of the 20th century