Author Question: The most abundant molecule in molecular clouds is A) H2. B) He2. C) CO. D) H2O. E) ... (Read 30 times)

ss2343 · **on:** Jul 27, 2018

The most abundant molecule in molecular clouds is

A) H2.
B) He2.
C) CO.
D) H2O.
E) HHe.

Question 2

Detailed study of stellar spectra in 1897, which enabled the development of the H-R diagram, was performed by:

A) E.C. Pickering.
B) Harlow Shapley.
C) James Lick.
D) John Herschel.
E) Antonia Maury.