Author Question: The first spacecraft to drop a weather probe into Jupiter's atmosphere was: A) Cassini. B) ... (Read 60 times)

sabina · **on:** Jul 27, 2018

The first spacecraft to drop a weather probe into Jupiter's atmosphere was:

A) Cassini.
B) Global Surveyor.
C) Voyager 2.
D) Viking 1.
E) Galileo.

Question 2

You discover a binary star system in which one member is a 15MSun main-sequence star and the other star is a 10MSun giant. Why should you be surprised, at least at first?

A) It doesn't make sense to find a giant in a binary star system.
B) The odds of ever finding two such massive stars in the same binary system are so small as to make it inconceivable that such a system could be discovered.
C) The two stars in a binary system should both be at the same point in stellar evolution; that is, they should either both be main-sequence stars or both be giants.
D) The two stars should be the same age, so the more massive one should have become a giant first.
E) A star with a mass of 15MSun is too big to be a main-sequence star.