Do you think it is possible that a 1-solar-mass horizontal branch star could harbor an advanced ...

Do you think it is possible that a 1-solar-mass horizontal branch star could harbor an advanced civilization? Explain your reasoning.
 
  What will be an ideal response?

Question 2

Which internal energy source produces heat by converting gravitational potential energy into thermal energy?
 
  A) accretion
  B) differentiation
  C) radioactivity
  D) both A and B
  E) all of the above

Question 3

We determine the structure of the Earth's core using
 
  A) deep mine shafts.
  B) satellite imaging.
  C) radar and sonar.
  D) seismic wave data.
  E) magnetic resonance imaging.

Question 4

Having nothing to do with trigonometry, ________ parallaxes use the width of absorption lines to estimate the star's luminosity and size and distance.
 
  A) bolometric
  B) photometric
  C) spectroscopic
  D) holographic
  E) videometric

Question 5

The brightest stars in aging globular clusters will be:
 
  A) core stars of planetary nebulae.
  B) massive blue main sequence stars like Spica.
  C) blue stragglers.
  D) red supergiants like Betelguese and Antares.
  E) blue supergiants like Rigel and Deneb.