In the above cartoon of the Orion constellation, the upper red supergiant star is known as Rigel and the lower right supergiant star is known as Betelgeuse
a. True
b. False
B
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A stable cloud colliding with a shock wave can be compressed and disrupted into fragments
Indicate whether the statement is true or false
If you compare two stars,
a. the one with the larger radius will always have the greater luminosity. b. the one with the higher surface temperature will always have the greater luminosity. c. the one with the smaller absolute magnitude will always have the greater luminosity. d. the one with the larger surface area has the greater energy flux from its surface.
A planetary nebula is
a. the expelled outer atmosphere of a medium-mass star. b. produced by a supernova explosion. c. produced by a nova explosion. d. a nebula within which planets are forming. e. a cloud of hot gas surrounding a planet.
The speed of an Earth satellite does NOT depend on its
A) distance from Earth. B) mass. C) but it depends on both D) it depends on neither