Very accurate measurements of stellar brightnesses and sudden ...

[Awilson837]

Very accurate measurements of stellar brightnesses and sudden changes are made with a ________.
 
  Fill in the blank(s) with correct word

Question 2

Viewed from afar, the transit of Earth would cause the Sun's brightness to dim by approximately one part in
 
  A) 100.
  B) 1,000.
  C) 10,000.
  D) 100,000.
  E) a million.

[kishoreddi]

Answer to Question 1

photometer.

Answer to Question 2

C

[Awilson837]

TYSM

[bassamabas]

Thanks for the timely response, appreciate it