A star of spectral type B with a mass of 10 times the mass of the ...

[Collmarie]

A star of spectral type B with a mass of 10 times the mass of the Sun lives approximately how long on the main sequence?
 
  A) 10 billion years
  B) 10 million years
  C) 1,000 years
  D) 10,000 years
  E) 1 billion years

Question 2

How do many of the jovian-type extrasolar planets seem to defy portions of the solar nebula theory? How can this perhaps be reconciled?
 
  What will be an ideal response?

[meganmoser117]

Answer to Question 1

B

Answer to Question 2

The solar nebula theory predicts the Sun's heat would drive light gases far out, making the jovian planets form far out, and letting denser terrestrials form closer in. But most of the jovians yet discovered are quite close to their home stars, perhaps due to tidal interactions causing these planets to spiral inward after they formed farther out.

[Collmarie]

Excellent

[Sarahjh]

TYSM