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