Author Question: The brightest stars of a young open cluster will be: A) Cepheid variables. B) massive blue main ... (Read 64 times)

jCorn1234 · **on:** Jul 27, 2018

The brightest stars of a young open cluster will be:

A) Cepheid variables.
B) massive blue main sequence stars.
C) red giants.
D) yellow main sequence stars like the Sun.
E) T Tauri variables.

Question 2

How does the data from ALMA provide direct evidence for nebular theory?

A) It shows concentric gaps in the disk which are almost certainly regions being cleared as planets form.
B) We can see large planets forming.
C) The amount of energy being radiated by the star system indicates there must be planets present.
D) Data from ALMA does not support nebular theory, instead it is causing scientists to revise the theory.