ASTR 1346 - STELLAR EVOLUTION OF SUNLIKE STARS
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+
Why do red dwarfs have long stellar lifetimes? Ans✓✓✓They have low
rates of fusion and low luminosities
The highest mass star known - at an unstable, tremendous 300 solar
masses - is: Ans✓✓✓R136A1
A "low mass" star might have a mass comparable to: Ans✓✓✓1860×
the mass of all of our Solar System's planets combined (2.5× the mass of
the Sun)
Degenerate matter is: Ans✓✓✓High density matter propped up by
pressure exerted by extremely high velocity subatomic particles, like
neutrons or electrons
Proton + Electron = ________ Ans✓✓✓Neutron + photons
A gaseous body has a mass around 45× that of the planet Jupiter
(making it 14,300 times heavier than Earth and around 4.3% the mass of
the Sun). How is this object generating energy? Ans✓✓✓It is a brown
dwarf, so it isn't undergoing any energy generation
Check each star that is likely to leave behind a black hole at the end of
its stellar life: Ans✓✓✓Naos, a 44 M⊙ O4 Main Sequence Star
, What is a supernova (specifically a Type II supernova) ? Ans✓✓✓The
collapse of the core of a huge star and the ensuing explosion that tears
the upper layers apart and blows them off into space at high speeds
A neutron star is likely to originate... Ans✓✓✓From the core collapse of
a 12 M⊙ star
How will a red dwarf's stellar life end? Ans✓✓✓The red dwarf's
convection will keep the star well mixed and eventually it will be
transformed into an all-helium white dwarf
What appears to be the upper mass limit for a black hole at birth?
Ans✓✓✓20 M⊙
Degenerate matter is: Ans✓✓✓High density matter propped up by
pressure exerted by very high speed subatomic particles, like electrons
A neutron star is likely composed of... Ans✓✓✓Neutrons
The most drastic change in the appearance and physical characteristics
of the Sun will occur: Ans✓✓✓Between the ages of 10 billion and 11
billion years
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+
Why do red dwarfs have long stellar lifetimes? Ans✓✓✓They have low
rates of fusion and low luminosities
The highest mass star known - at an unstable, tremendous 300 solar
masses - is: Ans✓✓✓R136A1
A "low mass" star might have a mass comparable to: Ans✓✓✓1860×
the mass of all of our Solar System's planets combined (2.5× the mass of
the Sun)
Degenerate matter is: Ans✓✓✓High density matter propped up by
pressure exerted by extremely high velocity subatomic particles, like
neutrons or electrons
Proton + Electron = ________ Ans✓✓✓Neutron + photons
A gaseous body has a mass around 45× that of the planet Jupiter
(making it 14,300 times heavier than Earth and around 4.3% the mass of
the Sun). How is this object generating energy? Ans✓✓✓It is a brown
dwarf, so it isn't undergoing any energy generation
Check each star that is likely to leave behind a black hole at the end of
its stellar life: Ans✓✓✓Naos, a 44 M⊙ O4 Main Sequence Star
, What is a supernova (specifically a Type II supernova) ? Ans✓✓✓The
collapse of the core of a huge star and the ensuing explosion that tears
the upper layers apart and blows them off into space at high speeds
A neutron star is likely to originate... Ans✓✓✓From the core collapse of
a 12 M⊙ star
How will a red dwarf's stellar life end? Ans✓✓✓The red dwarf's
convection will keep the star well mixed and eventually it will be
transformed into an all-helium white dwarf
What appears to be the upper mass limit for a black hole at birth?
Ans✓✓✓20 M⊙
Degenerate matter is: Ans✓✓✓High density matter propped up by
pressure exerted by very high speed subatomic particles, like electrons
A neutron star is likely composed of... Ans✓✓✓Neutrons
The most drastic change in the appearance and physical characteristics
of the Sun will occur: Ans✓✓✓Between the ages of 10 billion and 11
billion years
