From 3QD, a little background on how scientists look for new planets.

My editor often has to remind me that the general public is usually more interested in what a finding is than in the technical details behind a finding. Most of the time, my editor is right. In this case, however, I think the techniques employed by planet-hunters are pretty cool so the following is a brief primer on how the techniques work and the pros and cons of each:

[Link]