Warning: include_once(analyticstracking.php): Failed to open stream: No such file or directory in /Library/WebServer/Documents/science/lick.php on line 27

Warning: include_once(): Failed opening 'analyticstracking.php' for inclusion (include_path='.:/usr/local/Cellar/php/8.2.12/share/php/pear') in /Library/WebServer/Documents/science/lick.php on line 27
header photo


Yale Astronomy

Lick Planet Search

The Lick Observatory Planet Search (LPS) is the longest running exoplanet survey in the world. The Hamilton Spectrograph is used with either the 3-meter Shane Telescope or the 0.6-meter Coude Auxiliary Telescope (affectionately known as "The CAT") to measure the change in a star's radial velocity over time.

Some noteworthy discoveries credited to the Lick Observatory Planet Search include:

  • confirmation of the first planet found to orbit a sun-like star (51 Peg b),
  • the first multi-planet system (Ups And b, c, d), and
  • the first five-planet system (55 Cnc b, c, d, e, f).

Additionally, major LPS contributions to the field include:

  • the detection of planets around evolved stars,
  • a catalog of over 2,600 stellar chromospheric activity measurements, and
  • the planet-metallicity correlation.

The 25 year project is summarized in a paper by Fischer, Marcy & Spronck 2014, "The Twenty Five Year Lick Planet Search"
ApJS, 210, 5