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The Outer Planets Assessment Group (OPAG) was established by NASA in late 2004 to identify scientific priorities and pathways for exploration in the outer solar system. The group consists of a 15-person steering committee, which actively solicits input from the scientific community and reports its findings to NASA Headquarters. OPAG provides input to NASA but does not make recommendations.

OPAG Charter

OPAG is NASA's community-based forum designed to provide science input for planning and prioritizing outer planet exploration activities for the next several decades. It is chartered by NASA's Solar System Exploration Division and reports its findings at meetings of the Solar System Exploration Sub-Committee of the NASA Space Science Advisory Committee. Open to all interested scientists, OPAG regularly evaluates outer solar system exploration goals, objectives, investigations and required measurements on the basis of the widest possible community outreach.

Upcoming Meeting

OPAG Summer 2017 Meeting: 

Please join us September 6–7, 2017 in La Jolla, CA, at the Samuel H. Scripps Auditorium, next to the largest ocean in the inner Solar System.

Recent Meetings

February 22–23, 2017
Hosted by Georgia Tech
The Georgian Terrace

August 11–12, 2016
Flagstaff, Arizona
There will also be a ROW meeting on August 10, in Flagstaff.

February 1–2, 2016
Southwest Research Institute (SWRI)
San Antonio, Texas

August 24–26, 2015
Laurel, MD

March 18, 2015 LPSC OPAG Townhall Presentations with notes

OPAG Science Goals Document 2015

Draft for Community Comment

Scientific Goals for Exploration of the Outer Solar System

Outer solar system exploration motivation

Europa Studies

2013 Europa Clipper Update
Robert Pappalardo, Jet Propulsion Laboratory, California Institute of Technology
Brain Cooke, Applied Physics Laboratory, Johns Hopkins University

"Science Potential from a Europa Lander" in Astrobiology
Read the definitive, peer-reviewed version of the Science Definition Team's report on "Science Potential from a Europa Lander" in the journal Astrobiology.

Older Europa Mission Studies

Europa Lander Science Definition Team (SDT)  

Indication of Interest