The controversial book of this famous person, published in 1543 (the year of his death), suggested that Earth and other planets orbit the Sun
A) Tycho Brahe
B) Copernicus
C) Kepler
D) Galileo
E) Ptolemy
B
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Which of the following is one important reason why most large astronomical telescopes are reflecting telescopes rather than refracting telescopes?
A) Reflecting telescopes have their heaviest component (the mirror) at the bottom rather than the top of the telescope's tube. B) Reflecting telescopes take up less space than refracting telescopes. C) Reflecting telescopes are taller than refracting telescopes. D) For a mirror and lens of the same diameter, a mirror will collect more light.
The sidereal drive of a telescope mounting must turn the telescope
a. southward about the polar axis. b. eastward about the polar axis. c. westward about the polar axis. d. northward about the polar axis. e. none of the above
Sundogs and halos of the Sun and the Moon are caused by:
a. refraction by the atmosphere. b. refraction by water droplets. c. reflection of the object in water. d. scattering by molecules in the air. e. refraction by atmospheric ice crystals.
The luminosity of the red giant during its second trip to the upper right on the H-R diagram is less than before the helium flash expansion
Indicate whether the statement is true or false