The Terra Hunting Experiment is a planned 10-year search for
extra-solar planets using a purpose-built high resolution spectrograph modeled after
HARPS, called HARPS3 (aka RoboHARPS), which will be installed
on the Isaac Newton Telescope (INT), which will be (largely?) dedicated to the
survey.
The goal is to observe somewhat Sun-like stars for signs of
Earth-like planets using the radial velocity method, specifically,
for such planets with orbital period's on the order of a year.
The observations will be automated so it can track the radial velocity
of a substantial number of stars for months at a time.
As of 2/2026, the telescope has been prepared
(automation installed) and HARPS3 has been installed
and is currently undergoing commissioning.
Plans are to begin scientific observation in summer 2026.