A solar mass star will evolve off the main sequence when
A) it completely runs out of hydrogen.
B) it expels a planetary nebula to cool off and release radiation.
C) it explodes as a violent nova.
D) it builds up a core of inert helium.
E) it loses all its neutrinos, so fusion must cease.
Question 2
Studies by the Global Oscillations Network Group, along with satellite observations, indicate:
A) that the standard solar model requires substantial modification.
B) that all stars show the same kind of vibrations that our Sun does.
C) that there is an unknown energy transport mechanism in the Sun.
D) that there is less convection in the Sun than predicted by the standard solar model.
E) that the standard solar model accurately models the observed solar vibrations.
Balmer Lines in the Spectrum of a Star
Mass Exchange Between Close Binary Stars
Mass Loss by a Supermassive Star
An “Intermediate-Mass” Black Hole
Sequence of events from DNA to protein.
Tragic events of mass shootings.