Studies from ________ led to the discovery of dark energy. A) ...

[misspop]

Studies from ________ led to the discovery of dark energy.
 
  A) Type II supernovae in the Large Magellanic Cloud
  B) Cepheid variables in the Virgo Cluster
  C) the COBE microwave ripples
  D) the gravitational lensing by MACHOs
  E) Type I supernovae at very large redshifts

Question 2

What two observations allow us to calculate mass of the portion of the Galaxy within the Sun's orbit?
 
  A) the Sun's composition and luminosity
  B) the Sun's mass and its age
  C) the Sun's age and period of the Galactic Year
  D) the Sun's mass and velocity in orbit of the Galactic Center
  E) the Sun's orbital velocity and its distance from the Galactic Center

[Rilsmarie951]

Answer to Question 1

E

Answer to Question 2

E

[misspop]

Thanks

[Rilsmarie951]

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