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Exoplanet Exploration Program

In January 2013, the NASA Astrophysics Division initiated the formation of two Science and Technology Definition Teams (STDTs) to study probe-scale (cost less than $1B) mission concepts for the direct detection of extrasolar planets orbiting nearby stars. The STDTs were supported by a Design Team staffed by the Exoplanet Exploration Program. One STDT studied a concept based on a telescope with an internal coronagraph capable of generating the ultra-high contrast images needed for planet detection. This concept borrowed a great deal from the sub $1B Kepler design to control cost. The second study looked at two concepts using a pair of spacecraft flying in formation - a telescope and an external occulter (starshade). The first concept contained a complete end-to-end, two-spacecraft concept using commercial busses and a commercial telescope, at a cost slightly above the $1B target. The second starshade concept launched only the starshade spacecraft as an add-on to an existing space telescope mission. This second concept was significantly under the probe-class cost target. These studies are now complete and are summarized in their Final Reports, now available through the links below on this page.



STDT Final Reports



NASA Advisory Council’s Astrophysics Subcommittee (APS) Presentations - March 17-18

Presentation to the APS (Exo-S)

Presentation to the APS (Exo-C)


Committee on Astronomy and Astrophysics (CAA) Meeting - March 3-5, 2014

Presentation of Interim Report to the CAA (Exo-S)» video 1 » video 2

Presentation of Interim Report to the CAA (Exo-C)






Dear Colleague Letter -1/4/2013

External Occulter STDT Membership5/2/2013 - Chair: Sara Seager (MIT)

Internal Coronagraph STDT Membership - 5/2/2013 - Chair: Karl Stapelfeldt (GSFC)

STDT Charter6/27/2013



STDT Meetings
  • First joint meeting: July 1-2, 2013 at Goddard Space Flight Center, Greenbelt, MD
  • Second joint meeting: September 11-12, 2013 at MIT, Cambridge, MA
  • Third joint meeting: November 13-15 2013 at JPL, Pasadena, CA
  • Fourth Meeting (Exo-S): January 28-29, 2014, Washington DC
  • Fourth Meeting (Exo-C): February 3-5, 2014, JPL, Pasadena CA
  • Fifth Meeting (Exo-S): June 10-11, 2014, Chicago, IL
  • Fifth Meeting (Exo-C): June 17-19, 2014, NASA Ames, Mountain View, CA
  • Sixth Meeting (Exo-S): August 14-15, 2014, JPL
  • Sixth Meeting (Exo-C): September 15-16, 2014, GSFC
  • Seventh Meeting (Exo-C): November 3-5, 2014, JPL
  • Seventh Meeting (Exo-S): November 4-5, 2014, New York City