A Little Rocket Company Shoots for the Moon

Episode Summary

Executive Summary: Planetary Radio’s 2017 kickoff spans solar-system mission updates, SpaceX’s anticipated Falcon 9 return to flight, and an in-depth profile of Interorbital Systems’ ultra-low-cost, modular rocket strategy. The episode also highlights Cassini’s final year, Mars relay support from MAVEN, OSIRIS-REx and New Horizons milestones, and Bruce Betts’ skywatching/trivia segment.

Main Topics: 2017 planetary mission preview (Priority: 5/5): Emily Lakdawalla outlines major mission milestones: Cassini’s final Saturn year, OSIRIS-REx’s Earth flyby, New Horizons Kuiper belt observations, Juno’s continuing Jupiter science, and MAVEN’s expanded Mars relay role. SpaceX Falcon 9 return to flight and Falcon Heavy implications (Priority: 5/5): Bill Nye discusses the hoped-for Falcon 9 return after its failure, the possible near-term debut of Falcon Heavy, and what that means for LightSail 2 and broader launch confidence. Interorbital Systems’ modular, low-cost launch architecture (Priority: 5/5): Randa Milliron explains how Interorbital builds standardized Common Propulsion Modules, uses pressurization instead of turbopumps, and launches from a mobile ocean platform to reduce cost and increase flexibility. Small satellite access and educational payloads (Priority: 4/5): The interview emphasizes TubeSats, CubeSats, student-built spacecraft, and the company’s effort to make spaceflight accessible to schools, universities, and small organizations worldwide. Deep-space ambitions: lunar, Mars, Venus, and human spaceflight (Priority: 4/5): Milliron describes plans for Google Lunar XPRIZE missions, lunar impact and sample return concepts, and longer-term aspirations for Venus cloud missions and eventual human spaceflight. Bruce Betts’ space trivia and prizes (Priority: 3/5): The closing segment covers skywatching, a historical space question about the earliest-born human in space, and a new contest prize featuring Rick Sternbach’s 'Molten Earth' art.

Key Arguments: Cassini’s final year is scientifically valuable because its new orbit enables unprecedented ring and magnetosphere measurements before the mission ends. MAVEN is becoming important not only for Mars atmospheric science but also as a communications relay for Curiosity and Opportunity as older orbiters age. SpaceX’s rapid recovery matters because Falcon 9’s return would reopen the path for Falcon Heavy and future missions such as LightSail 2. Interorbital’s approach is that radical simplification, standard industrial parts, and bundling identical modules can cut cost and improve robustness. Ocean launch from a mobile platform avoids fixed-spaceport constraints, reduces infrastructure costs, and enables launch-on-demand flexibility. CubeSats and TubeSats are transforming access to space by letting students, nonprofits, and small companies build and fly useful payloads at lower cost. Disaggregated satellite constellations are presented as the future of both commercial space and resilience, replacing single expensive satellites with many smaller ones.

Data Points: Cassini mission end: September 2017 - Emily says Cassini’s “sad but proud” mission concludes this year. OSIRIS-REx Earth flyby: September 2017 - The spacecraft will return for a flyby and instrument checkout at Earth and the Moon. MAVEN relay passes: 2 communications passes every two weeks - MAVEN begins regular relay support for Mars rovers. Curiosity data volume in one pass: 700 megabits - Example of the large relay volume MAVEN can handle. MAVEN mission phase: second Martian year - The spacecraft enters a new mission phase focused on atmospheric science and relay support. Interorbital payloads booked: 135 payloads - Milliron says the company’s manifest has grown to 135 booked payloads. TubeSat academic launch price: $8,000 - Low-cost kit-and-launch offer for educational users. Orbital launch cost target: $500,000 - Milliron says this is the cost for the payload potential of a full rocket. Standard CPM engine thrust: 7,500 pounds - Thrust for Interorbital’s common propulsion module. Enhanced lunar engine thrust: 20,000 pounds - Used for the Neptune 8 Luna Google Lunar XPRIZE vehicle. Polar orbit altitude: 310 kilometers - Target orbit for Interorbital’s planned small-satellite launches. Expected satellite lifetime: 3 weeks to 3 months - Low orbit is intentionally chosen to limit debris and mission duration. Neptune 5 payload mass: 50 kilograms - Milliron describes the five-module orbital rocket’s lift capability. Google Lunar XPRIZE payload mass: about 25 pounds - Approximate payload to the lunar surface for their attempt. Falcon Heavy engines: 27 - Bill Nye corrects the engine count while comparing rocket architectures. Pluto year length: more than 90,000 days - Bruce Betts references this in the random space fact segment. Karman line definition: 100 kilometers - Trivia discussion about the FAI’s space boundary definition.

Pivotal Quotes: "It's going to be a really exciting year on Cassini, and it just comes to a sad but proud, like you say, end in September." — Emily Lakdawalla: Describing Cassini’s final year and its unique orbital science. "One test is worth a thousand expert opinions." — Bill Nye: On the importance of SpaceX testing after the Falcon 9 failure. "We’re looking for really something that we can turn these things out like sausages." — Randa Milliron: Explaining Interorbital’s mass-production philosophy for rockets.

Implications: The episode frames 2017 as a pivotal year for both scientific discovery and launch innovation: aging deep-space missions will still deliver major science, while cheaper, modular launch systems and small satellites may reshape who can access orbit and the Moon.