Main Engine Cut Off

Phil McAlister, former Director of NASA’s Commercial Space Division, joins me to talk about the Commercial LEO Destinations program, the budgetary issues facing NASA and its human spaceflight programs, and to share his perspective on the last (and next) few years in these areas. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Joel, Pat, Will and Lars from Agile, Joa...

NASA selected Blue Origin to (maybe) deliver the once-cancelled VIPER rover, modified Sierra Space’s ISS resupply contract which likely puts the nail in the coffin of Dream Chaser, and released the draft of its new commercial space station strategy. All different stories with one message: prove it. But maybe not in a good way. This episode of Main Engine Cut Off is brought to you by 34 executive p...

Caleb Henry, Director of Research at Quilty Space, joins me to talk about EchoStar’s spectrum sales and constellation cancellation, SpaceX’s spectrum purchase, and the financials of Starlink. This episode of Main Engine Cut Off is brought to you by 34 executive producers—Bob, Heiko, Creative Taxi, Josh from Impulse, Russell, Donald, Will and Lars from Agile, Matt, Steve, Lee, Joel, Tim Dodd (the E...

Casey Handmer, Founder of Terraform Industries, joins me to talk about the state of NASA in 2025, talent acquisition and retention, productivity, and so much more. This episode of Main Engine Cut Off is brought to you by 34 executive producers—Kris, Joakim (Jo-Kim), Creative Taxi, Heiko, Joel, Frank, Josh from Impulse, The Astrogators at SEE, David, Jan, Tim Dodd (the Everyday Astronaut!), Theo an...

Tom Marotta of The Spaceport Company joins me to talk about the executive order this week focused on commercial space regulatory reform, what problems it seeks to solve, his experience on both sides of those issues, and how we should understand the positioning of the order. This episode of Main Engine Cut Off is brought to you by 34 executive producers—Frank, David, Jan, Josh from Impulse, Steve,...

Michael Moreno, VP of Strategy at Lunar Outpost, joins me to talk about what they’ve been up to at the company, the NASA Lunar Terrain Vehicle Services contract, the idea of services as a business on the Moon, and more. This episode of Main Engine Cut Off is brought to you by 35 executive producers—Lee, Russell, Fred, The Astrogators at SEE, David, Matt, Theo and Violet, Warren, Josh from Impulse,...

A special simulcast of this week’s Off-Nominal—the other show I do, if you somehow haven’t heard of it!—because it’s exactly the topic list with exactly the guest I had up next on my list. I’m joined by Adrian Beil of NASASpaceflight to talk about the recent mayhem at Starbase, and to kick around European space policy topics in the run up to the ESA Ministerial later this year. This episode of Mai...

Lori Garver , former NASA Deputy Administrator, joins me to talk about the chaos of the last week: the withdraw of Jared Isaacman’s nomination for NASA Administrator, Starship Flight 9, and of course, the wild public breakup of Elon Musk and President Trump. This episode of Main Engine Cut Off is brought to you by 33 executive producers—David, Donald, Matt, Frank, Better Every Day Studios, Warren,...

Mark Albrecht joins me to talk about his time on the Trump 2024 Transition Team, the thinking behind some of the policy decisions we’re starting to see in the space and national security spheres, and more. This episode of Main Engine Cut Off is brought to you by 33 executive producers—Joonas, The Astrogators at SEE, Will and Lars from Agile, Theo and Violet, Frank, Russell, Kris, Bob, Lee, Pat, Ry...

We take a tour of Marotta Controls in Montville, New Jersey, to see how they work, how they develop, produce, and test products at rate, and we learn about the most feared topic in space—valves! This episode of Main Engine Cut Off is brought to you by 33 executive producers—Joonas, Josh from Impulse, Heiko, Donald, Stealth Julian, Warren, Kris, Frank, Steve, Bob, Better Every Day Studios, The Astr...

Caleb Henry, Director of Research at Quilty Space, joins me to talk megaconstellations, the hypersonics industry, and more. This episode of Main Engine Cut Off is brought to you by 33 executive producers—Joonas, Josh from Impulse, Heiko, Donald, Stealth Julian, Warren, Kris, Frank, Steve, Bob, Better Every Day Studios, The Astrogators at SEE, Joakim (Jo-Kim), Fred, Matt, Pat from KC, Natasha Tsako...

Jared Isaacman was in Congress for a confirmation hearing for his nomination as NASA Administrator, which was followed up by reports of huge proposed budget cuts at NASA and NOAA. And as expected, SpaceX, ULA, and Blue Origin all received awards for NSSL Phase 3 Lane 2. This episode of Main Engine Cut Off is brought to you by 33 executive producers—nt, Frank, Joonas, Will and Lars from Agile, Pat...

Eric Berger of Ars Technica joins me to talk about his recent interviews with Butch and Suni in the aftermath of their flight, the update NASA put out about Starliner, and how it all lands from where we are now. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Ryan, David, Theo and Violet, Fred, Steve, Warren, The Astrogators at SEE, Matt, Pat, Tim Dodd (the Everyday...

Eric Schmidt has taken a majority stake in Relativity and will serve as its CEO, so this is a good time to check in on their plans. Rocket Lab is planning to acquire Mynaric, and I have a theory I felt like I needed to float. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Matt, Donald, Frank, David, Lee, Will and Lars from Agile, Kris, Pat from KC, Joel, Bob, The A...

Josh Dinner of Space.com joins me to talk about a wild week in space—Firefly’s Blue Ghost 1, Intuitive Machines’ IM-2, SpaceX’s Starship Flight 8, Rocket Lab announcements, and more. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Stealth Julian, Kris, Heiko, Pat, Jan, Warren, Josh from Impulse, Ryan, Lee, Joel, David, Tim Dodd (the Everyday Astronaut!), Matt, Pat f...

Former Congressman and NASA Administrator Jim Bridenstine joins me to talk space policy, then and now: CLPS, Commercial Space Stations, Artemis, international partnerships, and more. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Stealth Julian, Kris, Heiko, Pat, Jan, Warren, Josh from Impulse, Ryan, Lee, Joel, David, Tim Dodd (the Everyday Astronaut!), Matt, Pat f...

Matthew Weinzierl and Brendan Rosseau join me to talk about their new book, Space to Grow: Unlocking the Final Economic Frontier . We talk about the economics driving the space industry today, how traditional economic theories apply—or not!—to the industry, and how to use economics as a lens to shape your business and policy approach to the future. This episode of Main Engine Cut Off is brought to...

Eric Berger of Ars Technica joins me to talk about Elon Musk and the whirlwind start of the second Trump administration, and what the future may hold for SLS. This episode of Main Engine Cut Off is brought to you by 31 executive producers—Will and Lars from Agile, Fred, The Astrogators at SEE, Ryan, Stealth Julian, Warren, Joakim (Jo-Kim), Tim Dodd (the Everyday Astronaut!), David, Frank, Lee, Joo...

Jonathan McDowell—astrophysicist at Harvard-Smithsonian Center for Astrophysics and the namesake of the McDowell Line at 80 kilometers—joins me to talk about his fundraiser to move his epic space library to a new, permanent home. Let’s help him out! This episode of Main Engine Cut Off is brought to you by 32 executive producers—Frank, Lee, Joel, Theo and Violet, Harrison, Josh from Impulse, Matt,...

Blue Origin flew New Glenn successfully for the first time, and SpaceX flew Starship for the seventh time. Both featured failures at different points of the flight, with the impacts on Starship being significantly bigger than those on New Glenn. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Frank, Lee, Joel, Theo and Violet, Harrison, Josh from Impulse, Matt, Warr...

Axiom Space announced changes to their station build out plan, bringing free-flying capability forward in their timeline and switching to a berthing port at the ISS to avoid the US Deorbit Vehicle. Firefly won another CLPS task order, this time for a lander with a rover, and for quite a bit more money than the last few. This episode of Main Engine Cut Off is brought to you by 32 executive producer...

Jared Isaacman, the man with a private space program, has been nominated NASA Administrator, to run the nation’s space program. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Frank, Lee, Joel, Theo and Violet, Harrison, Josh from Impulse, Matt, Warren, Will and Lars from Agile, Donald, Russell, Kris, Fred, Better Every Day Studios, Pat from KC, Joakim, Steve, Tim D...

A special preview of MECO Headlines, covering Starship Flight 6, ABL’s pivot to missile defense, and much more. Subscribe today to get Headlines regularly! This episode of Main Engine Cut Off is brought to you by 31 executive producers—Jan, Matt, Fred, Harrison, The Astrogators at SEE, Pat from KC, Will and Lars from Agile, Warren, Steve, Joel, Pat, Better Every Day Studios, Donald, Lee, David, Kr...

Donald Trump has been reelected President of the United States, and the main character of spaceflight, Elon Musk, is one of his top advisors. Some thoughts on where things may go from here, and a bit of my wishlist. This episode of Main Engine Cut Off is brought to you by 31 executive producers—Lee, Russell, The Astrogators at SEE, Theo and Violet, David, Fred, Donald, Stealth Julian, Josh from Im...

Jared Isaacman of the Polaris Program joins me to talk about the Polaris Dawn mission, his EVA experience, the Hubble Space Telescope situation, how the Polaris Program and SpaceX approach tech development and flight planning, and the Philadelphia Eagles. This episode of Main Engine Cut Off is brought to you by 31 executive producers—Jan, Matt, Fred, Harrison, The Astrogators at SEE, Pat from KC,...