Compare and contrast longitude and right ascension
What will be an ideal response?
Longitude is measured in degrees both east and west of the Greenwich meridian, but right ascension is measured in units of time as the Earth rotates, and goes only eastward from the vernal equinox.
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Vision Problems: What is the uncorrected near point of a farsighted person who can comfortably read a newspaper held 25 cm from his eyes when he wears +3.33-diopter contact lenses?
A. 1.5 m B. 0.50 m C. 1.9 m D. 0.75 m E. 0.60 m
The best way to use a telescope to look for life on other planets is to
a. search for absorption from nitrogen in their atmospheres. b. search for absorption from oxygen in their atmospheres. c. search for emission lines from water vapor in their atmospheres. d. search for carbon dioxide on their moons.
Which of the following stellar spectral types is cooler than our Sun?
A. K B. F C. O D. G
For what type of object is the period-luminosity relation used for determining distances?
A) RR Lyrae variables B) T Tauri variables C) Cepheids D) Cataclysmic variables E) Planetary nebulae