Policy is the prime mover of space exploration. It sets in motion government resources, defines regulatory requirements, and releases funds from national treasures. Good policy is therefore critical for success in space.

The Planetary Society participates in the process of developing space policy by providing original analysis, releasing policy recommendations, and generating useful data for public and academic use.

The Search for Life as a Guidepost to Scientific Revolution (PDF)

In this submission to the 2023 - 2032 planetary science decadal survey, The Planetary Society argued for the importance of the search for life, not just as an inspiring goal, but as a means to achieve a scientific revolution within the biology and medicine. Unlike past revolutions, searching for life presents a clear pathway for success: we know how to do it and we know where to look.

Increasing the Scope of Planetary Defense Activities: Programs, Strategies, and Relevance in a Post-COVID-19 World (PDF)

In this submission to the 2023 - 2032 planetary science decadal survey, The Planetary Society argued that, due to COVID-19, the public is very aware of the value of disaster preparation. Combined with the coming Apophis flyby, there is a new immediacy for investments into planetary defense, the ultimate "low probability, high impact" event. We recommended that the scientific community embrace planetary defense and endorse a permanent mission line.

Thinking Big: How Large Aperture Space Telescopes Can Aid the Search for Life in Our Lifetimes (PDF)

In this submission to the Astrophysics decadal survey, The Planetary Society discussed the capabilities needed to conduct the most scientifically compelling endeavor currently facing space science: the search for life elsewhere. It includes context for NASA's search for life beyond the Earth, including the organization's assessment of public support for this effort, and ways for the Astro2020 process to address this goal, including "going big" on large space telescopes to enable statistically-significant detections of biosignatures in the atmospheres of exoplanets.

Mars in Retrograde: A Pathway to Restoring NASA’s Mars Exploration Program (PDF)

NASA's Mars Exploration Program has systematically worked to understand the Red Planet through robotic missions of exploration. It enabled a revolution in humanity’s knowledge of Mars and methodically worked to achieve the top Mars science goal—sample return to Earth. The Planetary Society's analysis, however, found a fundamental contradiction in NASA’s extant Mars plans: there is not much of a program anymore within the Mars Exploration Program. This is a troubling path of decline—and decisions must be made now in order to stop it.

Recommendations for the Trump Administration and NASA

Presented to the Trump transition team prior to taking office in 2017, this report outlined ways in which space science and exploration could be pursued at the U.S. space agency.

Humans Orbiting Mars: A Critical Step Toward the Red Planet (PDF)

The Planetary Society held a workshop on the future of human exploration of Mars in Washington, D.C. in 2015. Nearly 80 participants from various NASA centers, the scientific community, academia, and government attended. The workshop featured the orbit-first concept of Mars exploration as proposed by a team from NASA's Jet Propulsion Laboratory. Orbit-first would send astronauts near the Moon throughout the 2020s, to Mars orbit and Phobos in 2033, and finally to the surface of Mars by 2039 to begin an ongoing program of exploration.


The Planetary Exploration Budget Dataset

The cost per mission, per year, for every robotic planetary exploration effort in NASA's history.

Project Apollo Historical Cost Dataset

A rich data set tracking the costs of Project Apollo, free for public use. Includes unprecedented program-by-program cost breakdowns, facilities construction, salaries, and related programs.

Your Guide to NASA's Budget

How big is NASA's budget right now? What was it like in the past? How does it compare to the rest of government spending? These answers, as well as charts, raw data, and original sourcing, are contained within.

Latest Articles and Analysis

The Cost of Perseverance, in Context

The cost of the Perseverance rover disappears into the noise of U.S. spending and represents a more modest investment than you might think.

Our Submissions to the Planetary Science Decadal Survey

Advocating for space at every step in the process, The Planetary Society submitted two papers to the forthcoming planetary science decadal survey—one on the search for life and one on the importance of planetary defense.

NASA's Commercial Crew Program is a Fantastic Deal

NASA's commercial crew program stands to be the agency's lowest-cost human spacecraft effort in nearly 60 years.

Dive deep into the history of planetary exploration funding

This unique, comprehensive dataset includes the full budget history, by year, of every NASA planetary science mission and related activities.

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Planetary Radio: Space Policy Edition

The Planetary Society's Chief Advocate, Casey Dreier, hosts this monthly podcast that engages the world's experts in space policy and history to share the behind-the-scenes stories of how space exploration actually happens. Available on major podcast providers, learn how to subscribe.

Space Policy Edition: Why the SLS is a National Asset, and Why That Matters

The Coalition for Deep Space Exploration’s Mary Lynne Dittmar talks with Casey Dreier about how and why spacefaring nations prioritize funding for space development and exploration.

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How We Work: Space Policy & Advocacy

Space exploration doesn't just happen—it requires a vigilant and educated public to demand support for this unique program. Be one of them. We'll show you how.