Space telescopes looking for transiting planets look for small drops in brightness; these drops are:
A) less than 10%.
B) less than 1%.
C) less than 0.01%.
D) less than 0.0001%.
E) any size.

Question

Quizplus · Accepted Answer

Space telescopes looking for transiting planets typically look for decreases in brightness of less than 0.01%. This is because planets that are similar in size to Earth will cause a dip in brightness of around 1%, while smaller planets will cause even smaller drops in brightness. Anything larger than 0.01% could be caused by other factors such as stellar variability or instrumental noise.

Space Telescopes Looking for Transiting Planets Look for Small Drops