In the fission theory of the Moon's origin a. the Moon broke ...

[EY67]

In the fission theory of the Moon's origin
 
  a. the Moon broke from a rapidly spinning Earth
  b. the Earth and its Moon formed from the same cloud of matter
  c. the Moon formed elsewhere in the solar nebula and was later captured by Earth.
  d. the Moon formed when a very massive planetesimal smashed into the young Earth.

Question 2

Gravitational lensing
 
  a. occurs when light passes near a massive object and is deflected by the object's gravitational field.
  b. can be used to determine the luminosity of a galaxy.
  c. occurs when the mass of a galaxy is greater than expected from the luminosity of the galaxy.
  d. occurs when the mass of a galaxy is less than expected from the luminosity of the galaxy.
  e. can be used to determine the recessional velocity of a galaxy.

[fromAlphatoOmega22]

Answer to Question 1

A

Answer to Question 2

A

[EY67]

Thanks for the timely response, appreciate it

[robbielu01]

Gracias!