What is the transit method of finding extrasolar planets? A) ...

[jwb375]

What is the transit method of finding extrasolar planets?
 
  A) measuring the spectrum of the star for a periodic variation in its Doppler shift
  B) monitoring a star to detect periodic dips in its brightness from the planet passing behind the star
  C) monitoring a star to detect periodic dips in its brightness from the planet passing in front of the star
  D) observing a star during the rare occasion of another star passing directly in front of it; slight changes in how the light is bent by gravity can indicate the presence of planets around the closer star

Question 2

The total number of stars in the observable universe is about ________.
 
  A) the same as the number of grains of sand on all the beaches on Earth
  B) the same as the number of grains of sand in a school sandbox
  C) 100 billion
  D) the same as the number of atoms that make up the Earth

[Melissahxx]

Answer to Question 1

C

Answer to Question 2

A

[jwb375]

Thanks for the timely response, appreciate it

[ryhom]

Excellent