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Science-Related Homework Help Astronomy Topic started by: sunshine938 on Mar 19, 2018



Title: In globular clusters, the brightest stars will be:
Post by: sunshine938 on Mar 19, 2018
In globular clusters, the brightest stars will be:
 
  A) massive blue main sequence stars.
  B) red supergiants.
  C) T Tauri stars.
  D) blue stragglers.
  E) planetary nebulae.

Question 2

Distinguish an Sa from an Sc galaxy.
 
  What will be an ideal response?

Question 3

Which class of stars probably has too small a habitable zone for life to arise?
 
  What will be an ideal response?

Question 4

The lithosphere of a planet is the layer that consists of
 
  A) material above the crust.
  B) material between the crust and the mantle.
  C) the rigid rocky material of the crust and uppermost portion of the mantle.
  D) the softer rocky material of the mantle.
  E) the lava that comes out of volcanoes.


Title: In globular clusters, the brightest stars will be:
Post by: ir_nizam on Mar 19, 2018
Answer to q. 1

B

Answer to q. 2

Sa spirals have more tightly wound spiral arms, and a wider nuclear bulge; Sc are flatter, dustier, and have looser arms.

Answer to q. 3

Class M stars are too cool to generate a large habitable zone.

Answer to q. 4

C


Title: In globular clusters, the brightest stars will be:
Post by: sunshine938 on Mar 19, 2018
Brilliant