The ____ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective
a. light-gathering power
b. focal length
c. magnifying power
d. resolving power
e. spherical aberration
d
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Why would a value of 500 km/s/Mpc for the Hubble constant contradict theories of stellar evolution?
What will be an ideal response?
Meteor Crater in Arizona is about 1.2 kilometers across. According to the graph, about how big was the object that made this crater? (Note: Be sure to read the axis labels carefully.)
A) 1 meter B) 10 meters C) 100 meters D) 1 kilometer
Which of the following is not a characteristic of the 11-year sunspot cycle?
A) The sunspot cycle is steady, so that each 11-year cycle is nearly identical to every other 11-year cycle. B) The likelihood of seeing solar prominences or solar flares is higher when sunspots are more common and lower when they are less common. C) The Sun's entire magnetic field flip-flops with each cycle, so that the overall magnetic cycle averages 22 years. D) The number of sunspots on the Sun at any one time gradually rises and falls, with an average of 11 years between the times when sunspots are most numerous.
Our Sun is a star of spectral type
A) G. B) F. C) S. D) M.