Most of the planets discovered around other stars have masses comparable to the terrestrial planets in our own solar system.
Indicate whether the statement is true or false
Question 2
You discover a binary star system in which one member is a 15 solar mass main-sequence star and the other star is a 10 solar mass giant star. Why should you be surprised, at least at first?
A) The two stars should be the same age, so the more massive one should have become a giant first.
B) 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.
C) It doesn't make sense to find a giant in a binary star system.
D) A star with a mass of 15 solar masses is too big to be a main-sequence star.
E) The odds of ever finding two such massive stars in the same binary system are so small as to make it inconceivable.
How Niko Tinbergen discovered the digger wasp's nest-locating behaviour.
The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
Rising and Setting of Stars at Middle North Latitudes
Pre–Main-Sequence Stars
Planets
Evolutionary Stages of Stars