Which stellar spectral type has strong molecular absorption lines ...

[karlynnae]

Which stellar spectral type has strong molecular absorption lines in its optical spectrum?
 
  A) M B) G C) K D) O E) B

Question 2

The Metonic cycle is the
 
  A) 18-year, 11-day period over which the pattern of eclipses repeats.
  B) period between successive Easters.
  C) 12-month period of a lunar calendar.
  D) 19-year period over which the lunar phases occur on about the same dates.
  E) 29 1/2-day period of the lunar cycle.

[ciecieme]

Answer to Question 1

A

Answer to Question 2

D

[karlynnae]

TYSM

[aruss1303]

Gracias!