Astronomy 101 Exam 4 questions and Verified
Answers
Stars are formed from cold interstellar gas clouds made of: - ANSWER molecular hydrogen gas
and dust grains
Objects more massive than our Sun form into stars: - ANSWER much faster, over tens of
thousands of years
A star like our sun will spend most of its "shining" lifetime as: - ANSWER a main sequence star
All stars in a stellar cluster have roughly the same: - ANSWER distance
-age and composition are also the same
The event that marks the end of a star's evolutionary life before becoming a white dwarf is: -
ANSWER a planetary nebula
A nova involves: - ANSWER mass transfer onto a white dwarf in a binary star system
Astronomers determine the age of star clusters by observing: - ANSWER luminosity of stars at
the turnoff point
The location of the galactic center was identified using: - ANSWER red giants that were part of
variable globular clusters
Our sun is located in the Milky Way galaxy: - ANSWER about halfway from the center in the
spiral arms
Kepler's Third Law applies to: - ANSWER any gravitational mass
Answers
Stars are formed from cold interstellar gas clouds made of: - ANSWER molecular hydrogen gas
and dust grains
Objects more massive than our Sun form into stars: - ANSWER much faster, over tens of
thousands of years
A star like our sun will spend most of its "shining" lifetime as: - ANSWER a main sequence star
All stars in a stellar cluster have roughly the same: - ANSWER distance
-age and composition are also the same
The event that marks the end of a star's evolutionary life before becoming a white dwarf is: -
ANSWER a planetary nebula
A nova involves: - ANSWER mass transfer onto a white dwarf in a binary star system
Astronomers determine the age of star clusters by observing: - ANSWER luminosity of stars at
the turnoff point
The location of the galactic center was identified using: - ANSWER red giants that were part of
variable globular clusters
Our sun is located in the Milky Way galaxy: - ANSWER about halfway from the center in the
spiral arms
Kepler's Third Law applies to: - ANSWER any gravitational mass
