ASTA02H3 Lecture Notes - Gravitational Redshift, Horizontal Branch, White Dwarf
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Astronomy - Tutorial #8.
every main-sequence star
fuses Hydrogen to make Helium to sustain it
until it collapses
mass divided by luminosity
determines how long the star will last
note that any equality for the purpose of this course can be viewed as a proportionality
is a constant
cross out the constant for
two more lifetime relationships
note that and are constants of proportionality
and it becomes
(luminosity of the star is )
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answer is 0.21
equations that will not be provided on the exam
distance of the Sun to the center of the galaxy is 800kpc
have H-shell burning
He core burning
of its gravitational energy to heat
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