The current count of extrasolar planets (on planetquest.jpl.nasa.gov) stands at 277, none of them Earth-like. Most were detected as a Doppler shift in stellar spectral lines, a method that 'sees ...

Scientists have discovered more than 4,000 alien planets to date. Here's a brief rundown of the main techniques they use to find these far-flung worlds.

David H. Sliski, Cullen H. Blake, Samuel Halverson, A Low-cost Environmental Control System for Precise Radial Velocity Spectrometers, Publications of the Astronomical Society of the Pacific, Vol. 129 ...

The Second Workshop on Extreme Precision Radial Velocities defined circa 2015 the state of the art Doppler precision and identified the critical path challenges for reaching 10 cm s−1 measurement ...