TWiS 157: Space Force! - With Chief Master Sergeant of the Space Force John Bentivegna

04/18/25 • 74 min

We've all heard of it, and some of us have seen the Netflix comedy series, but what exactly is the U.S. Space Force, and what do they do? We invited Chief Master Sergeant of the Space Force John Bentivegna to the podcast to discuss the founding of Space Force, what they are charged with overseeing, their role in continuously monitoring U.S. orbital assets and possible threats to them, and their future role in guarding the space lanes. We also look at the controversy surrounding the recent Blue Origin flight with Katy Perry and other women of note, a recent explosion at a Northrop Grumman facility, and the announcement of a possible detection of life on exoplanet k2-18b!
Headlines:

Possible Life on Exoplanet K2-18b: Scientists have detected potential signs of life in the spectra of exoplanet K2-18b, including dimethyl sulfide, a substance produced by algae and microbes on Earth.
Blue Origin's Glam Flight Controversy: The recent Blue Origin NS-31 flight, intended to promote women in STEM, sparked debate about space tourism and what defines an astronaut.
Northrop Grumman Explosion: A recent explosion at Northrop Grumman's Promontory, Utah, test site destroyed a building, raising questions about the future of solid rocket motor development.

Interview with Chief Master Sergeant John Bentivegna:

His role in the Space Force: Chief Master Sergeant Bentivegna discusses his role as the senior enlisted member, advising on guardian development, strategy, and welfare.
Career Path: Bentivegna recounts his journey from joining the Air Force in 1994 to becoming a key leader in the Space Force, highlighting his experience in space operations.
Space Force Mission: He details the Space Force's core functions: assured space access, global space operations (including GPS management and space domain awareness), and space control to ensure space superiority.
Space Warfighting Framework: The launch of the Space Warfighting Framework, just released this week, is discussed, emphasizing its importance for integrating and planning space operations across the joint force and clarifying the Space Force's capabilities and operational lexicon.
Concerns About Threats in Space: The podcast addresses the threats posed by adversarial actions in space, such as the deployment of ASAT weapons and potential EMP attacks, and the measures the Space Force is developing to protect and defend critical space assets.
Space Force and NASA Collaboration: The ongoing collaboration between the Space Force and NASA is highlighted, including the role of guardians in space exploration, research, and astronaut support.
Future of Space Operations: The episode concludes with a look at the future of space operations, including the potential for a "Space Coast Guard" and the expanding role of the Space Force in lunar and cislunar activities.

Hosts: Rod Pyle and Tariq Malik

Guest: John Bentivegna

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Possible Life on Exoplanet K2-18b: Scientists have detected potential signs of life in the spectra of exoplanet K2-18b, including dimethyl sulfide, a substance produced by algae and microbes on Earth.
Blue Origin's Glam Flight Controversy: The recent Blue Origin NS-31 flight, intended to promote women in STEM, sparked debate about space tourism and what defines an astronaut.
Northrop Grumman Explosion: A recent explosion at Northrop Grumman's Promontory, Utah, test site destroyed a building, raising questions about the future of solid rocket motor development.

Interview with Chief Master Sergeant John Bentivegna:

His role in the Space Force: Chief Master Sergeant Bentivegna discusses his role as the senior enlisted member, advising on guardian development, strategy, and welfare.
Career Path: Bentivegna recounts his journey from joining the Air Force in 1994 to becoming a key leader in the Space Force, highlighting his experience in space operations.
Space Force Mission: He details the Space Force's core functions: assured space access, global space operations (including GPS management and space domain awareness), and space control to ensure space superiority.
Space Warfighting Framework: The launch of the Space Warfighting Framework, just released this week, is discussed, emphasizing its importance for integrating and planning space operations across the joint force and clarifying the Space Force's capabilities and operational lexicon.
Concerns About Threats in Space: The podcast addresses the threats posed by adversarial actions in space, such as the deployment of ASAT weapons and potential EMP attacks, and the measures the Space Force is developing to protect and defend critical space assets.
Space Force and NASA Collaboration: The ongoing collaboration between the Space Force and NASA is highlighted, including the role of guardians in space exploration, research, and astronaut support.
Future of Space Operations: The episode concludes with a look at the future of space operations, including the potential for a "Space Coast Guard" and the expanding role of the Space Force in lunar and cislunar activities.

Hosts: Rod Pyle and Tariq Malik

Guest: John Bentivegna

Download or subscribe to This Week in Space at https://twit.tv/shows/this-week-in-space.

Join Club TWiT for Ad-Free Podcasts!
Support what you love and get ad-free shows, a members-only Discord, and behind-the-scenes access. Join today: https://twit.tv/clubtwit

Previous Episode

TWiS 156: Rocket Blast - With Dr. Phil Metzger

In this episode of This Week in Space, hosts Rod Pyle and Tariq Malik welcome Dr. Phil Metzger from the University of Central Florida to discuss the dangerous realities of rocket plumes when landing spacecraft on the Moon and Mars. Before diving into the main topic, the hosts talk about Jared Isaacman's NASA administrator confirmation hearing, Katy Perry's upcoming Blue Origin spaceflight, and a newly discovered comet.

Headlines:

Jared Isaacman's NASA Administrator Confirmation Hearing - The billionaire Shift4 CEO and astronaut faced intense questioning about his independence from Elon Musk, with senators repeatedly asking if Musk was present during his meeting with Trump. Isaacman confirmed he'll continue with Artemis missions and the ISS through 2030.
Katy Perry's Space Flight - The pop star will join the world's first all-female crew aboard Blue Origin's New Shepard, scheduled for April 14. The crew includes Gayle King and other accomplished women, though the flight has received criticism for being extravagant during tough economic times.
New Comet Discovered - Comet C/2025 F2 Swan was discovered on March 29 by a Ukrainian skywatcher and is currently visible to the naked eye in dark skies, though it will soon only be visible from the Southern Hemisphere.

Main Topic - Rocket Plume Effects with Dr. Phil Metzger:

Rocket Plume Dangers - Dr. Metzger explains how rocket exhaust can propel lunar soil at speeds up to 3 km/second (above lunar escape velocity), potentially damaging equipment far from landing sites and even ejecting material entirely off the Moon.
Apollo 12 Evidence - The Surveyor 3 spacecraft, visited by Apollo 12 astronauts, showed significant sandblasting damage from the lunar module landing 160 meters away, with paint surfaces scoured and peppered with holes from high-velocity particles.
SpaceX Starship Launch Analysis - Dr. Metzger studied the first Starship test launch and found concrete chunks traveling at 90 meters per second, with sand carried 6 miles away in raindrops formed within a rotating cloud of hot exhaust.
Landing Pad Solutions - Various approaches for building lunar landing pads include microwave sintering of lunar soil, bringing polymers from Earth as binders, creating rock beds, and baking pavers in ovens—all requiring robotic construction methods.
Future of Space Industry - Dr. Metzger advocates moving computing and energy production to space to reduce Earth's industrial burden. He estimates it could take 20-30 years to reach a tipping point where space industry becomes self-sustaining, potentially accelerated by billionaire investment or government support.
Lunar Mining Potential - Dr. Metzger discusses surface mining approaches versus underground operations, noting the Moon's surface has been bombarded for billions of years with bedrock lying 10 kilometers deep.
Science Budget Concerns - The hosts and Dr. Metzger express concerns about reported cuts to NASA's science budget, particularly affecting Earth science programs, with Dr. Metzger warning this could harm America's leadership in scientific research.

Hosts: Rod Pyle and Tariq Malik

Guest: Dr. Phil Metzger

Download or subscribe to This Week in Space at https://twit.tv/shows/this-week-in-space.

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Next Episode

TWiS 158: Hubble's 35th Birthday - With "Hubble Hugger" Dr. John Grunsfeld

The Hubble Space Telescope has been one of NASA's most successful flagship missions, recently celebrating 35 years in space. Often referred to as "the gift that keeps giving," the HST has provided not just magnificent science—shared worldwide—but also some of our universe's most significant and stunning images, inspiring wonder and driving countless young people into the sciences and STEM fields in general. And for the general public, Hubble continues to provide a profound sense of the wonders of the universe and our place in it. We are joined this week by Dr. John Grunsfeld, who flew five times on the space shuttle and spent over 50 hours on Hubble servicing missions to keep those incredible images coming. Join us for a fascinating deep dive into this magnificent project.
Headlines

NASA Budget Cuts: The episode starts with a discussion about proposed budget cuts to NASA, including concerns from future NASA administrator Jared Isaacman, who expressed reservations about the cuts.
Hercules-Corona-Borealis Great Wall: The hosts discuss the discovery of the largest structure in the universe, the Hercules-Corona-Borealis Great Wall, and the ongoing efforts to understand its size and implications.
China's Tiangong Space Station: An update on China's Tiangong space station and their successful crew rotation operations, as well as their recent agreement to train astronauts from Pakistan.

Interview with Dr. John Grunsfeld

John Grunsfeld's Background: Grunsfeld shares his early inspirations, including the pioneering Gemini program during the Space Race, and how this influenced his path to becoming an astronaut and physicist.
Hubble's 35th Anniversary: The conversation shifts to the Hubble Space Telescope's 35th anniversary and Grunsfeld's unique perspective as someone who flew on the space shuttle and performed multiple Hubble servicing missions.
Hubble Servicing and EVAs: Grunsfeld details the challenges and complexities of performing extravehicular activities (EVAs) to repair and upgrade Hubble, highlighting the extensive training involved.
Hubble's Scientific Contributions: The discussion covers Hubble's significant scientific achievements, including measuring the age and expansion of the universe and the discovery of dark energy.
NASA's Value and Budget Concerns: Grunsfeld emphasizes NASA's importance in driving innovation, inspiring the public, and its positive impact on the economy, expressing concern over proposed budget cuts.
Future of Space Telescopes: The episode concludes with a look at the future of space telescopes, including the Habitable Worlds Observatory and the potential for robotic servicing to maintain these complex instruments.

Hosts: Rod Pyle and Tariq Malik

Guest: Dr. John Grunsfeld

Download or subscribe to This Week in Space at https://twit.tv/shows/this-week-in-space.

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