Why are white dwarf supernovae more useful than massive star ...

[yoooooman]

Why are white dwarf supernovae more useful than massive star supernovae for measuring cosmic distances?
 
  A) White dwarf supernovae all have roughly the same true peak luminosity, while massive supernovae come in a wide range of peak luminosities.
  B) White dwarf supernovae are much more common than massive star supernovae.
  C) White dwarf supernovae follow a period-luminosity relation, while massive supernovae do not.
  D) We can see only white dwarf supernovae in distant galaxies, not massive star supernovae.

Question 2

In the cosmological principle, we can easily test cosmic homogeneity with the redshift surveys, but isotropy cannot be so tested.
 
  Indicate whether the statement is true or false

[katara]

Answer to Question 1

A

Answer to Question 2

FALSE

[yoooooman]

Wow, this really help

[parshano]

Great answer, keep it coming