The structure of most galaxies is most apparent using near-infrared images that show the locations of ____.
a. dense molecular clouds
b. spiral tracers
c. atomic hydrogen clouds
d. cool, low-luminosity stars
e. hot, high-luminosity stars
Question 2Which power of a telescope reveals fine details within an image?
a. light gathering power
b. resolving power
c. magnifying power
d. focusing power
e. defining power
Question 3NASA's Hubble Deep Field images and GOODS program observations have shown that ____.
a. there are large patchy regions of the sky covered with galaxies separated by empty areas
b. the entire sky is thickly covered with galaxies
c. galaxies can be found in all directions, but are relatively rare
d. galaxies are densely concentrated in a disk structure, which contains the Milky Way
e. galaxies are concentrated in two opposite directions on the sky, with very few in between
Question 4If telescope A is 160 cm in diameter, and telescope B is 32 cm in diameter, how much more light does telescope A gather than telescope B?
a. 5 times
b. 10 times
c. 20 times
d. 25 times
e. 100 times
Question 5Which types of galaxies would contain very little gas and dust?
a. elliptical galaxies only
b. elliptical and spiral galaxies
c. spiral galaxies only
d. elliptical and irregular galaxies
e. spiral and irregular galaxies
Quick Reply
