Main Engine Cut Off

Anthony Colangelo
  • 4.9 (284)
  • NATURAL SCIENCES
  • UPDATED BIWEEKLY

MECO is opinion and analysis of spaceflight, exploration, policy, and strategy, by Anthony Colangelo.

  1. T+319: Headlines, December 22, 2025

    1D AGO

    T+319: Headlines, December 22, 2025

    A holiday special! Enjoy this week’s episode of Headlines free. It’s an absolute monster episode—way longer than usual Headlines episodes, I promise—but it’s a great example of what you get when you support the show over at mainenginecutoff.com/support. NASA finally—and we really do mean it this time—has a full-time leader - Ars TechnicaAgencywide Town Hall with NASA Administrator Jared Isaacman, Friday, Dec. 19, 2025 - YouTubeTrump commits to Moon landing by 2028, followed by a lunar outpost two years later - Ars TechnicaNASA Teams Work MAVEN Spacecraft Signal Loss - NASA ScienceNASA Continues MAVEN Spacecraft Recontact Efforts - NASA ScienceSpaceX Sets $800 Billion Valuation, Confirms 2026 IPO Plans - BloombergSpaceX $1.5 Trillion Value Target Hinges on Starlink — And Elon - BloombergSpaceX Said to Notify Employees of Quiet Period Ahead of IPO - BloombergIn a surprise announcement, Tory Bruno is out as CEO of United Launch Alliance - Ars TechnicaSpace Development Agency awards $3.5 billion in contracts for missile-tracking satellites - SpaceNewsChinese astronauts inspect debris-damaged Shenzhou-20 spacecraft during spacewalk - SpaceNewsSpace Station – Off The Earth, For The EarthNASA Astronaut Jonny Kim, Crewmates Return from Space Station - NASAAfter key Russian launch site is damaged, NASA accelerates Dragon supply missions - Ars TechnicaR-7 ICBM/Soyuz rocket launch facilities in BaikonurLaunch Roundup: China, Russia, Rocket Lab, ULA join SpaceX in flying this week - NASASpaceFlight.comLaunch Previews: Ariane 6, Falcon 9, Atlas V, and Electron launches highlight busy week - NASASpaceFlight.comLaunch Roundup: International launches fill manifest during last full week of 2025 - NASASpaceFlight.comChina launches 4 times in 4 days, boosting megaconstellation and surveillance assets - SpaceNewsChina launches new TJS satellite, commercial Kinetica-1 lofts 9 spacecraft - SpaceNewsMichael Nicolls on X: “When satellite operators do not share ephemeris for their satellites, dangerously close approaches can occur in space.   A few days ago, 9 satellites were deployed from a launch from the Jiuquan Satellite Launch Center in Northwestern China. As far as we know, no coordination or…”China launches experimental cargo spacecraft, opaque tech demo mission and remote sensing satellite - SpaceNewsAndrew Jones on X: “Turns out there were two male mice launched on the DEAR-5 cargo spacecraft for neuroscience research. Spacecraft is planned to operate in orbit for one year and is not rated for reentry, so it's game over at some point for the rodents. Video is prelaunch.”Rocket Lab launches JAXA tech demo satellite - SpaceNewsAriane 6 launches Galileo navigation satellites - SpaceNewsThese are the flying discs the government wants you to know about - Ars TechnicaBlue Origin flies first wheelchair user to space - SpaceNewsRocket Lab wraps up record launch year - SpaceNewsJapan’s H3 suffers second-stage anomaly, QZS-5 satellite lost - SpaceNewsAndrew Jones on XChina launches new Guowang satellites, Long March 12A launch and landing attempt date set - SpaceNewsKeep an eye on upcoming launches with rocketlaunch.live.

    49 min
  2. T+318: General Chance Saltzman, Chief of Space Operations, United States Space Force

    DEC 17

    T+318: General Chance Saltzman, Chief of Space Operations, United States Space Force

    Yesterday, I had the chance to visit the Pentagon and sit down with General Chance Saltzman, Chief of Space Operations—the head of the United States Space Force. We talk about the service 6 years into its existence, the state of acquisitions, the threats and space environment today, and what the future may hold for the Space Force when it comes to human spaceflight. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Russell, Natasha Tsakos, Will and Lars from Agile, Theo and Violet, David, Matt, Better Every Day Studios, Warren, The Astrogators at SEE, Josh from Impulse, Stealth Julian, Joakim, Frank, Pat, Joel, Donald, Ryan, Tim Dodd (the Everyday Astronaut!), Joonas, Jan, Steve, Fred, Lee, Kris, Heiko, and four anonymous—and hundreds of supporters. Topics United States Space ForceB. Chance Saltzman > United States Space Force > DisplaySpace Force roadmap set to define what the service needs and why - SpaceNewsUS intel officials “concerned” China will soon master reusable launch - Ars TechnicaAsked why we need Golden Dome, the man in charge points to a Hollywood film - Ars TechnicaSpace Force rolls out new naming scheme for satellites and space weapons - SpaceNewsAndrew Jones on X: “Outrageous images of China's Shijian-26, an apparent new-gen Earth observation satellite, from Maxar. SSD of 1.9 cm.”Andrew Jones on X: “China's CGST has returned the favour, using its Jilin-1 sats to image a Maxar Worldview Legion 2 satellite.”Scott Tilley 🇺🇦 🇨🇦 (@coastal8049) / XThe Show Like the show? Support the show on Patreon or Substack!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOFollow @meco@spacey.space on MastodonListen to MECO HeadlinesListen to Off-NominalJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterArtwork photo by Blue OriginWork with me and my design and development agency: Pine Works

    49 min
  3. T+317: Isaacman Renomination Hearing, Starliner Flights Cut, Starship at SLC-37, Zhuque-3 Almost Sticks the Landing, and More (with Stephen Clark)

    DEC 8

    T+317: Isaacman Renomination Hearing, Starliner Flights Cut, Starship at SLC-37, Zhuque-3 Almost Sticks the Landing, and More (with Stephen Clark)

    Stephen Clark of Ars Technica joins me to talk about a ton of stories in the news—Jared Isaacman was back in front of Congress, a few Starliner flights have been cut from the ISS manifest, Starship received environmental approval to proceed at SLC-37, Zhuque-3 almost stuck its first landing attempt, the Soyuz launch pad fell apart at Baikonur, and the Space Force has a new mission naming scheme. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Matt, Fred, Kris, Natasha Tsakos, Josh from Impulse, Better Every Day Studios, Joakim, Joel, Ryan, The Astrogators at SEE, Tim Dodd (the Everyday Astronaut!), Heiko, Jan, Theo and Violet, Donald, Pat, Will and Lars from Agile, Lee, Russell, Joonas, Warren, Steve, Frank, Stealth Julian, David, and four anonymous—and hundreds of supporters. Topics Author: Stephen Clark - Ars TechnicaNASA nominee appears before Congress, defends plans to revamp space agency - Ars TechnicaCongress warned that NASA’s current plan for Artemis “cannot work” - Ars TechnicaNASA seeks a “warm backup” option as key decision on lunar rover nears - Ars TechnicaIt’s official: Boeing’s next flight of Starliner will be allowed to carry cargo only - Ars TechnicaA spectacular explosion shows China is close to obtaining reusable rockets - Ars TechnicaBefore a Soyuz launch Thursday someone forgot to secure a 20-ton service platform - Ars TechnicaRivals object to SpaceX’s Starship plans in Florida—who’s interfering with whom? - Ars TechnicaSpaceX on X: “We’ve received approval to develop Space Launch Complex-37 for Starship operations at Cape Canaveral Space Force Station. Construction has started. With three launch pads in Florida, Starship will be ready to support America’s national security and Artemis goals as the world’s…”Attack, defend, pursue—the Space Force’s new naming scheme foretells new era - Ars TechnicaThe Show Like the show? Support the show on Patreon or Substack!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOFollow @meco@spacey.space on MastodonListen to MECO HeadlinesListen to Off-NominalJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterArtwork photo by Blue OriginWork with me and my design and development agency: Pine Works

    1 hr
  4. T+316: New Glenn’s Second Launch, First Landing, and Upgrade Roadmap

    NOV 26

    T+316: New Glenn’s Second Launch, First Landing, and Upgrade Roadmap

    Blue Origin is fresh off an incredible few weeks—a successful second launch and first landing of New Glenn, followed by an exciting unveil of upgrades to the vehicle, including an enormous new version, New Glenn 9x4. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Lee, Natasha Tsakos, Fred, Will and Lars from Agile, Ryan, Stealth Julian, Pat, Heiko, Kris, Jan, Better Every Day Studios, Theo and Violet, Matt, Josh from Impulse, Russell, Joel, Warren, Joonas, Joakim, Tim Dodd (the Everyday Astronaut!), Donald, David, Frank, Steve, The Astrogators at SEE, and four anonymous—and hundreds of supporters. Topics Blue Origin’s New Glenn rocket came back home after taking aim at Mars - Ars TechnicaJeff Bezos on X: “Good overview of the landing. We nominally target a few hundred feet away from Jacklyn to avoid a severe impact if engines fail to start or start slowly. We’ll incrementally reduce that conservatism over time. We are all excited and grateful for yesterday…”New Glenn Update | Blue OriginBooster 18 suffers anomaly during proof testing - NASASpaceFlight.comSenate Commerce Committee schedules hearing on Isaacman renomination - SpaceNewsLawmakers writing NASA’s budget want a cheaper upper stage for the SLS rocket - Ars TechnicaThe Show Like the show? Support the show on Patreon or Substack!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOFollow @meco@spacey.space on MastodonListen to MECO HeadlinesListen to Off-NominalJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterArtwork photo by JAXAWork with me and my design and development agency: Pine Works

    30 min
  5. T+315: Autonomy in Space (with Simone D’Amico, DJ Bush, and Al Tadros)

    NOV 11

    T+315: Autonomy in Space (with Simone D’Amico, DJ Bush, and Al Tadros)

    Simone D’Amico of Stanford and EraDrive, DJ Bush of NVIDIA, and Al Tadros of Redwire join me to talk about autonomy in space, to get into the specific details of what they’re working on and how it comes together, and what it may do for the industry in the next few years. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Joonas, Russell, Donald, Stealth Julian, Pat, Fred, David, Lee, Frank, Josh from Impulse, Steve, Joel, Joakim, Matt, Natasha Tsakos, Tim Dodd (the Everyday Astronaut!), Kris, Theo and Violet, Heiko, Will and Lars from Agile, Jan, Warren, The Astrogators at SEE, Ryan, Better Every Day Studios, and four anonymous—and hundreds of supporters. Topics Episode T+315: Autonomy in Space (with Simone D’Amico, DJ Bush, and Al Tadros) - YouTubeSimone D'Amico | LinkedInCenter for AEroSpace Autonomy Research (CAESAR)Stanford spinoff EraDrive claims $1 million NASA contract - SpaceNewsDJ Bush | LinkedInHow Starcloud Is Bringing Data Centers to Outer Space | NVIDIA BlogAl Tadros | LinkedInRedwire Space | Heritage + InnovationNASA Starling - Autonomous Tip and Cue in OrbitNASA Starling - Distributed Optical NavigationNASA Starling - Autonomous Space Domain AwarenessVISORS - Precise Formation-FlyingAutonomous Spacecraft 3D Model ReconstructionThe Show Like the show? Support the show on Patreon or Substack!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOFollow @meco@spacey.space on MastodonListen to MECO HeadlinesListen to Off-NominalJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterArtwork photo by JAXAWork with me and my design and development agency: Pine Works

    1h 3m
  6. T+314: Jockeying for the Artemis 3 Lander, and the NASA Administrator Position

    OCT 31

    T+314: Jockeying for the Artemis 3 Lander, and the NASA Administrator Position

    Thinking through the chaos that has ensued over the NASA Administrator role, the Artemis 3 lander acceleration movement, the SpaceX Starship HLS update, and a bit on how we actually got here. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Donald, Stealth Julian, Jan, Theo and Violet, The Astrogators at SEE, Joakim, Steve, Matt, Fred, Lee, Joel, Kris, Ryan, David, Josh from Impulse, Warren, Heiko, Pat, Russell, Tim Dodd (the Everyday Astronaut!), Joonas, Better Every Day Studios, Will and Lars from Agile, Natasha Tsakos, Frank, and four anonymous—and hundreds of supporters. Topics SpaceX - UpdatesSpaceX teases simplified Starship as alarms sound over Moon landing delays - Ars TechnicaWhy did NASA’s chief just shake up the agency’s plans to land on the Moon? - Ars TechnicaElon Musk just declared war on NASA’s acting administrator, apparently - Ars TechnicaHow America fell behind China in the lunar space race—and how it can catch back up - Ars TechnicaChina completes landing and takeoff test for crewed moon lander - SpaceNewsChina completes second hot-fire test for new moon rocket, including engine restarts - SpaceNewsTrump pulls Isaacman nomination for space. Source: “NASA is f***ed.” - Ars TechnicaThe Show Like the show? Support the show on Patreon or Substack!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOFollow @meco@spacey.space on MastodonListen to MECO HeadlinesListen to Off-NominalJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterArtwork photo by NASAWork with me and my design and development agency: Pine Works

    35 min
  7. T+313: Starlink, Kuiper, Project Bromo, and More (with Caleb Henry)

    OCT 30

    T+313: Starlink, Kuiper, Project Bromo, and More (with Caleb Henry)

    Caleb Henry, Director of Research at Quilty Space, joins me (in studio!) to talk about Starlink V3, Starlink satellite relay, Kuiper’s rollout, the Airbus-Thales-Leonardo merger, and the future of Iridium. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Heiko, Joonas, Joel, The Astrogators at SEE, Russell, Joakim, Tim Dodd (the Everyday Astronaut!), Natasha Tsakos, David, Steve, Josh from Impulse, Will and Lars from Agile, Better Every Day Studios, Jan, Fred, Warren, Kris, Pat, Donald, Matt, Frank, Stealth Julian, Ryan, Theo and Violet, Lee, and four anonymous—and hundreds of supporters. Topics Caleb Henry (@ChenrySpace) / XThe OneWeb Book | Caleb Henry | SubstackQuilty SpaceSatellite operators will soon join airlines in using Starlink in-flight Wi-Fi - Ars TechnicaStarlink mini lasers to link Muon Space satellites for near real-time connectivity - SpaceNewsProject Kuiper plots broadband services in five countries by end of March - SpaceNewsAirbus, Leonardo and Thales agree to combine space businesses - SpaceNewsProject Bromo: An Escape Hatch, Not a FortressIridium pulls $1 billion 2030 service revenue goal amid SpaceX’s D2D push - SpaceNewsThe Show Like the show? Support the show on Patreon or Substack!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOFollow @meco@spacey.space on MastodonListen to MECO HeadlinesListen to Off-NominalJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterArtwork photo by NASAWork with me and my design and development agency: Pine Works

    33 min
  8. T+312: Starship Flight 11, Space Policy, and Priorities (with Miles O’Brien)

    OCT 17

    T+312: Starship Flight 11, Space Policy, and Priorities (with Miles O’Brien)

    Miles O’Brien, science correspondent for PBS News and CNN space analyst, joins me to talk about Starship Flight 11, the current space policy landscape including the ongoing government shutdown, the possible return of Jared Isaacman, and what to do about all the competing budget priorities at NASA. This episode of Main Engine Cut Off is brought to you by 32 executive producers—Joakim, David, Heiko, Ryan, Jan, Kris, Frank, Josh from Impulse, Steve, Russell, Joonas, Joel, Matt, Will and Lars from Agile, Natasha Tsakos, Donald, Lee, Better Every Day Studios, Warren, Theo and Violet, Pat, Fred, The Astrogators at SEE, Tim Dodd (the Everyday Astronaut!), Stealth Julian, and four anonymous—and hundreds of supporters. Topics Miles O'Brien Productions - Miles O'BrienMiles Ahead | Miles O'Brien | SubstackSpaceX finally got exactly what it needed from Starship V2 - Ars TechnicaMore layoffs at JPL - SpaceNewsTrump, Billionaire Isaacman Said to Meet About Top NASA Job - BloombergFormer NASA nominee Jared Isaacman in talks to become agency's chief | ReutersThe Show Like the show? Support the show on Patreon or Substack!Email your thoughts, comments, and questions to anthony@mainenginecutoff.comFollow @WeHaveMECOFollow @meco@spacey.space on MastodonListen to MECO HeadlinesListen to Off-NominalJoin the Off-Nominal DiscordSubscribe on Apple Podcasts, Overcast, Pocket Casts, Spotify, Google Play, Stitcher, TuneIn or elsewhereSubscribe to the Main Engine Cut Off NewsletterArtwork photo by NASAWork with me and my design and development agency: Pine Works

    44 min
See All (320)

Hosts & Guests

4.9
out of 5
284 Ratings

About

MECO is opinion and analysis of spaceflight, exploration, policy, and strategy, by Anthony Colangelo.

Information

  • Creator
    Anthony Colangelo
  • Years Active
    2016 - 2025
  • Episodes
    320
  • Rating
    Clean
  • Copyright
    © 2016–2026 Colangelo Studios, LLC
  • Show Website
    Main Engine Cut Off

You Might Also Like