Planetary Society All-Stars Review 2020 Space Milestones

Episode Summary

Executive Summary: Planetary Radio’s year-end roundtable reviewed 2020’s biggest space milestones and looked ahead to 2021. The team highlighted SpaceX’s crewed Dragon flights, LightSail 2’s continued success, rapid progress in planetary defense, landmark sample-return missions, Artemis/Gateway international cooperation, Mars mission arrivals, and the imminent James Webb launch—while emphasizing advocacy, public engagement, and continued support for innovation.

Main Topics: Crewed commercial spaceflight (Priority: 5/5): SpaceX’s Crew Dragon mission to the ISS was framed as the year’s standout public-space milestone, proving the commercial crew model and reducing U.S. reliance on Soyuz. LightSail 2 and solar sailing (Priority: 5/5): The team discussed LightSail 2’s ongoing operations, its legacy for future missions like NEA Scout and Solar Cruiser, and its status as a member-funded success story in space technology. Planetary defense and asteroid preparedness (Priority: 5/5): Speakers linked COVID-19 response lessons to asteroid risk planning, stressing the need for NEO Surveyor, deflection technology, public awareness, and global coordination. Mars exploration and sample return (Priority: 5/5): They reviewed the July 2020 Mars launch window, Perseverance’s science and sampling role, China’s Tianwen-1 and Zhurong ambitions, and the historic push toward Mars sample return. Artemis, Gateway, and lunar return (Priority: 4/5): The conversation covered SLS/Orion progress, Gateway’s international partnerships, the Human Landing System budget shortfall, and Canada’s role via Canadarm and astronaut seats. Sample-return achievements beyond Mars (Priority: 4/5): Hayabusa2, OSIRIS-REx, Chang’e 5, and PlanetVac illustrated that sample return is becoming central to planetary science and technology development. Advocacy, funding, and public engagement (Priority: 4/5): The Day of Action, budget wins, and upcoming virtual events like PlanetFest showed how Planetary Society advocacy translated into concrete NASA funding outcomes.

Key Arguments: Commercial crew succeeded both technically and politically, validating a decade of investment and creating more resilient access to the ISS. LightSail 2 proves solar sailing can work for small spacecraft and has directly influenced NASA follow-on missions. Planetary defense needs dedicated infrastructure: space-based surveys, ground-based follow-up, and deflection readiness, not just general awareness. COVID-19 is a useful analogy for asteroid risk: high-impact, low-probability threats require preparation before a crisis hits. Mars sample return has become a long-term international program, no longer a speculative goal, and now has real funding and ESA participation. Gateway may endure politically because international partners have already invested in it through formal agreements and astronaut commitments. Sample-return missions are scientifically essential because Earth labs can do analyses and dating impossible to carry out on spacecraft. Planetary Society advocacy produced measurable budget results, including support for Mars missions, Roman, NEO Surveyor, and sample-return work.

Data Points: Crewed Dragon mission: First crewed orbital spaceflight and first commercial flight to the ISS on Dragon - SpaceX mission with Bob Behnken and Doug Hurley in 2020 Crew Dragon astronauts: 2 astronauts - Launch and return of the first NASA-SpaceX crewed mission Second crewed launch complement: 4 astronauts including 1 Japanese participant - Operational Crew Dragon flight mentioned by Casey LightSail 2 supporters: Over 50,000 people - Kickstarter and additional support for the mission LightSail 2 backers countries: Over 100 countries - Global membership support for the solar sailing project Shoemaker NEO grants: About 60 grants - Program history over 23 years Shoemaker NEO grant funding total: About half a million dollars - Total distributed through the grant program Shoemaker grant wins in 2020: 6 grant winners - Current year’s awards Day of Action attendees: 115 people - Planetary Society members traveled to Washington, D.C. Day of Action states represented: 28 states - Participants came from across the United States Day of Action congressional meetings: 168 offices - Advocacy meetings held during the 2020 Day of Action Mars sample return funding: $263 million - NASA budget money for first phase A of Mars Sample Return Human Landing System request: $3.5 billion - NASA’s 2021 budget request under the Trump administration Human Landing System appropriated: $850 million - Congressional funding level for 2021 Canada Artemis astronaut seats: 2 missions - Canadian contribution in exchange for Gateway/Artemis role Canadarm contribution: 1 new Canadarm for Gateway - Canadian Space Agency agreement with NASA Chang’e 5 returned samples: 1.7 kilograms - Lunar material returned to Earth Hellas Planitia depth: About 6 kilometers below surrounding surface - Discussed in trivia and Mars topography context Mars relief difference: Nearly 30 kilometers - Difference between Olympus Mons and lowest point on Mars Earth relief difference: A little less than 20 kilometers - Comparison between Everest and Mariana Trench Time Since Launch prize duration: 2,738 years - Device starts counting when a pin is removed Apophis size: Roughly 300 meters - Asteroid discussed as a public-awareness opportunity Solar Cruiser sail area: 1,700 square meters - Upcoming NASA solar sail mission slated for 2025 NEA Scout sail size: Bigger than LightSail 2; spacecraft about double the size - Technology demonstration to fly on SLS mission James Webb launch target: October 31, 2021 - Planned launch date mentioned in the conversation Quadrantids peak time: January 3 at 14:30 UTC - Meteor shower viewing guidance

Pivotal Quotes: "2020 wasn't so bad once you got off the surface of our world." — Matt Kaplan: Opening framing line for the year-end reflection on space achievements "This was the apotheosis of that gamble or that effort was to send people into space using this new way of doing business." — Casey Dreyer: On commercial crew as the payoff of NASA’s decision to rely on private partners "luck is not a plan." — Bruce Betts: On the need for systematic planetary defense rather than hoping Earth avoids impacts

Implications: The episode signals a maturing space sector: commercial crew, international lunar/Mars cooperation, and sample-return science are becoming normal. It also underscores that public advocacy and funding can directly shape mission outcomes and future exploration priorities.