How could the distance measurements based on white dwarf supernovae be independently validated (or invalidated)?
What will be an ideal response?
Question 2
One energy source for brown dwarfs is:
A) hydrogen fusing to helium.
B) helium fusing to carbon.
C) iron core collapse.
D) helium-3 fusing to helium-4.
E) deuterium fusing to helium-3.