The hottest Aerospace Substack posts right now

And their main takeaways
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Top Technology Topics

Technology can cut plane contrails by two-thirds. Getting airlines to use it isn't so easy

Sustainability by numbers • 246 implied HN points • 23 Mar 26
🕹 Technology Aerospace
  1. AI plus satellite-based route planning can sharply cut contrail formation when crews follow the plan — flights that flew avoidance routes saw about a 63% reduction in contrails.
  2. The main barrier is human and operational: dispatchers chose the avoidance plan rarely and pilots only partly executed it, so overall contrail reductions were only around 12%.
  3. Scaling this up will require better tools (like vertical route profiles), automation or incentives to make avoidance routes the default, and regulatory or financial support; early data suggest little extra fuel burn but more study is needed.

The Sea Geeks Are Ready for World War III

Common Sense with Bari Weiss • 737 implied HN points • 12 Mar 26
🕹 Technology Aerospace
  1. The oceans are turning into active battlefields, with ship attacks, underwater mines, and even submarine engagements becoming more common.
  2. The U.S. doesn’t have enough modern ships and the big defense contractors’ bureaucracy is making it hard to quickly rebuild maritime strength, despite political calls to restore dominance.
  3. A new wave of startups is building seaplanes, unmanned cargo aircraft, and underwater drones that can ferry supplies, do surveillance, and counter mines, offering fast, flexible alternatives to the traditional defense industry.

Four theories about the SpaceX - xAI merger

Marcus on AI • 9129 implied HN points • 03 Feb 26
🕹 Technology Aerospace
  1. The official synergy story — that combining tweets, AI models, and rockets creates a game-changing integrated company — is probably overstated and unlikely to deliver real technical or business advantages.
  2. Other popular explanations, like Musk using the deal to consolidate control over social-media and space infrastructure or that AI compute will soon move to space, also have big practical and economic gaps.
  3. A more plausible reading is that the merger is effectively a bailout for xAI, which is burning cash, lacks clear users or differentiation, and makes the valuation and equity swap look like an overpayment.

Reading List 12/06/2025

Construction Physics • 7307 implied HN points • 06 Dec 25
🕹 Technology Aerospace
  1. 3D printing is becoming a game changer in manufacturing, with companies like Lego now able to mass-produce 3D-printed parts, improving design options.
  2. The average age of first-time homebuyers is often reported to be rising, but some data suggests it might actually be declining, highlighting issues with survey methods.
  3. Old technologies, like the filings coherer used in early radios, were simple to implement but led to better designs as the technology advanced over time.

SpaceX Magic

Chris’s Substack • 239 implied HN points • 18 Oct 24
🕹 Technology Aerospace
  1. SpaceX successfully launched Starship and caught its returning booster mid-air using a unique chopsticks method. This makes the booster reusable, saving fuel for future launches.
  2. With plans for future flights, SpaceX is addressing small issues found in the last flight to ensure their next mission goes smoothly and demonstrates reliable reentry.
  3. Starship is being designed for missions to the Moon and Mars, and with improved technology, SpaceX aims to make space travel affordable and accessible for many in the future.
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SpaceX Evolution (Appendix C: Why SpaceX Not NASA)

Chris’s Substack • 79 implied HN points • 25 Oct 24
🕹 Technology Aerospace
  1. NASA has become more inefficient over time, losing its ability to innovate and push space technology as its bureaucracy has grown.
  2. In contrast, SpaceX is agile and focused, quickly developing new technology without the red tape that hampers NASA's progress.
  3. NASA's current projects may be less ambitious than what SpaceX could achieve, highlighting SpaceX's crucial role in future space exploration.

N-1 Block A

Soviet Space Substack • 178 implied HN points • 12 Oct 24
🕹 Technology Aerospace
  1. The N1-3L rocket has a complex engine system, with different engines numbered for clarity. Understanding these details is crucial for analyzing the rocket's design and performance.
  2. Grid fins are an important feature of the N1 rocket, providing enhanced control during high-speed flights. Their design has evolved over time to improve stability and effectiveness.
  3. There were various design changes made to the Block A of the N1 rocket to improve its function and control. These updates were likely based on lessons learned from previous flight tests.

A Positive Sign for Flying in the Future...

Breaking the News • 1244 implied HN points • 27 Dec 25
🕹 Technology Aerospace
  1. An automated Autoland system successfully landed a Beechcraft King Air after pilot incapacitation, showing that flight automation can handle real emergencies and improve safety for single-pilot general aviation.
  2. This successful deployment is a major technological step but won’t quickly replace two-pilot rules or passenger comfort with pilotless airliners; it is instead a forward-looking advance toward more autonomous point-to-point transport.
  3. Separately, recent close calls where US military aircraft went dark or interfered with civilian flight paths reveal an urgent, avoidable safety problem in current airspace operations.

Will the China Cycle Come for Airbus and Boeing?

Construction Physics • 33196 implied HN points • 23 Oct 24
💼 Business Aerospace
  1. China has been trying to develop its own commercial aircraft industry for decades but faces many challenges. From technology theft concerns to complex manufacturing processes, it hasn't succeeded like in other industries.
  2. The C919 jet is China's latest attempt to compete with Boeing and Airbus. While it's secured a good number of orders, issues with performance and certification limits its appeal in the global market.
  3. Airbus has been more successful in China due to establishing local assembly lines. This made them more competitive compared to Boeing, which hesitated to set up operations in China.

🌕 Occupy Luna: Elon Musk's gravity arbitrage

Faster, Please! • 365 implied HN points • 11 Feb 26
🕹 Technology Aerospace
  1. SpaceX’s new Moon focus shows private companies can lead human expansion off Earth and open commercial opportunities on the Moon.
  2. Promoting lunar colonization as public policy is being argued as a practical way to spur economic growth, technological progress, and long-term prosperity.
  3. The Moon push signals a convergence between entrepreneurial space ventures and pro-growth, capitalist ideas about humanity’s future in space.

Containerized Missile Systems Without Cranes

Tapa’s Substack • 4 HN points • 05 Oct 24
🕹 Technology Aerospace
  1. Containerized missile systems aim to fit missiles into shipping containers for easy transport. This could help with quick deployment and keeping them hidden.
  2. Most missiles are too tall for standard shipping containers, requiring them to be laid down horizontally. This makes launching them more complicated.
  3. A new idea suggests using a small jump jet to lift and angle the missile for firing, making it faster and potentially cheaper than using a crane system.

Reading List 12/28/24

Construction Physics • 11065 implied HN points • 28 Dec 24
🕹 Technology Aerospace
  1. China is planning to build the world's largest hydroelectric dam, which could produce a huge amount of electricity and help meet its environmental goals.
  2. Chinese manufacturing is becoming very competitive not just in cars, but also in pharmaceuticals, with Chinese companies now creating many new drugs.
  3. In manufacturing, new startups often struggle financially at first, facing a tough phase called the 'valley of death' before they start making profits.

Reading List 12/21/2024

Construction Physics • 10230 implied HN points • 21 Dec 24
🕹 Technology Aerospace
  1. Commercial fusion energy is making progress with a new reactor that could generate power for many homes and create jobs.
  2. Boom Technology secured $100 million to develop a supersonic airliner, but its future remains uncertain due to challenges in airplane engine development.
  3. There's growing interest in using airships for cargo transport, as they can be more efficient than ships and planes for certain distances.

Reading List 12/07/24

Construction Physics • 9395 implied HN points • 07 Dec 24
🕹 Technology Aerospace
  1. Many of the biggest cities in the U.S. are seeing strong economic growth post-COVID, with Austin being the fastest at 30%. This shows how some areas are bouncing back well after the pandemic.
  2. There are many bans on wind and solar energy projects in certain U.S. counties. This could slow down the growth of clean energy despite its importance for fighting climate change.
  3. SpaceX is breaking records with its rocket launches, planning to launch as many rockets in a year as NASA's Space Shuttle did in its entire history. This shows how quickly the space industry is advancing.

Brainstorming Solutions for Aerospace Sector Challenges

Space Ambition • 259 implied HN points • 02 Aug 24
🕹 Technology Aerospace
  1. An online brainstorming session is being organized to find solutions for challenges in the aerospace industry. Everyone is welcome to join, regardless of their experience level.
  2. The discussions will be moderated by someone with a strong background in aerospace and venture capital. This helps ensure the session is productive and insightful.
  3. There are two scheduled sessions on August 10 to accommodate different time zones, making it easier for people around the world to participate.

Yes, Blowing Things Up Is How We Build Things

Common Sense with Bari Weiss • 547 implied HN points • 07 Dec 25
🕹 Technology Aerospace
  1. Deliberately testing hardware to destruction is a normal, necessary way to find weaknesses and build stronger weapons, and it’s better to fail on the range than on the battlefield.
  2. Calling routine destructive tests mere 'failures' misframes and can unfairly damage companies doing risky but essential national-defense work.
  3. There was a time when the press accepted and even supported testing-to-failure because it sped weapon development, and recent negative coverage represents a shift from that practical mindset.

Weekly Dose of Optimism

Not Boring by Packy McCormick • 117 implied HN points • 23 Jan 26
🕹 Technology Aerospace
  1. Personalized, data-driven cancer care can work: one determined patient used intensive diagnostics, bespoke therapies, and a coordinated team to reach remission, pointing to a future where tailored oncology is more widely available.
  2. mRNA cancer vaccines look promising when combined with immunotherapy — a Moderna/Merck trial cut the risk of death or recurrence by about half in melanoma, suggesting vaccines will become an important part of cancer treatment.
  3. Big engineering projects are scaling to solve huge problems — drone delivery (Zipline) is expanding life-saving logistics, The Ocean Cleanup is intercepting a growing share of plastic pollution, and space-based networks like TeraWave aim to provide high-capacity global connectivity for enterprises.

Will New Glenn and Neutron Beat Starship?

Erik Explores • 245 implied HN points • 25 Dec 25
🕹 Technology Aerospace
  1. New Glenn’s successful booster landing showed that SpaceX isn’t the only game in town and that other companies can catch up, breaking the sense of inevitable SpaceX dominance.
  2. Starship failing to meet Elon Musk’s original full-reuse goals wouldn’t be a total failure because a non-reusable or redesigned second stage could be much lighter and cheaper while still outperforming SLS and Falcon Heavy.
  3. A realistic outcome is that SpaceX might achieve full reuse but with a lower payload (~45 t), while also offering expendable variants that can deliver roughly 100–130 t to LEO, keeping the system competitive and flexible.

How to Build a Satellite: A Comprehensive Guide

Space Ambition • 179 implied HN points • 24 May 24
🕹 Technology Aerospace
  1. Building satellites is getting easier, which is why there are so many more in space now. A lot of companies are able to provide satellite services without even owning a satellite.
  2. Planning is really important when developing a satellite. You need to decide its goals, select the right orbit, and choose if you will build or buy your satellite components.
  3. Testing is a crucial step in satellite assembly. After building, you have to run various tests to make sure everything works properly before sending it to space.

What I read this week...

Chamath Palihapitiya • 943 implied HN points • 23 Sep 23
💼 Business Aerospace
  1. Chamath Palihapitiya shared articles on TikTok, Starship, and Coach Prime
  2. Germany's economy declined, raising questions about its performance
  3. Various articles covered topics like tech relationships, education, and religious projections

🚀💥 Time to worry about SpaceX and Starship?

Faster, Please! • 548 implied HN points • 20 Jun 25
🕹 Technology Aerospace
  1. There are concerns that frequent explosions during SpaceX launches could delay their plans to reach the Moon and Mars. This might affect the timeline for these ambitious projects.
  2. Elon Musk aims to make space travel accessible to more people, moving beyond just government use. His vision includes transporting settlers to Mars and making intercontinental travel faster.
  3. If Musk's plans succeed, SpaceX could become one of the most significant companies ever, helping humanity expand across the Solar System.

Gateways to the Cosmos: From Gigantic Spaceports to Unconventional Methods of Reaching Space

Space Ambition • 419 implied HN points • 01 Sep 23
🕹 Technology Aerospace
  1. There are many active launch sites around the world, with a total of 66 launch sites identified, including 46 currently operational. These sites are crucial for space exploration and are usually equipped with necessary facilities.
  2. The rise of private companies is changing how rockets are launched. Smaller rockets and satellite launches are becoming more common, leading to the creation of smaller spaceports tailored to these needs.
  3. Some countries are considering building spaceports far from home due to advantageous geography or legal reasons. Launching rockets closer to the equator, for example, can make the process more efficient.

The Ill-Defined Space Global Orbital Launch Summary: 2025

Ill-Defined Space • 28 implied HN points • 01 Jan 26
🕹 Technology Aerospace
  1. 2025 was a record year with 315 successful orbital launches and over 4,500 spacecraft deployed, driven mainly by the U.S. and China which together made up about 90% of launches.
  2. The U.S. led the world with 192 launches—SpaceX flew 165 of them—and reusable rockets plus busy Florida spaceports concentrated activity, creating strong capability but reliance on a few major providers.
  3. China sharply increased launches to 90 with a diverse roster of rockets and growing commercial, mostly domestic, customers, while Russia’s launch activity stayed low (17) and leaned on older Soyuz systems.

Weekly Dose of Optimism #151

Not Boring by Packy McCormick • 189 implied HN points • 04 Jul 25
🕹 Technology Aerospace
  1. Hermeus is making waves in aviation by speeding up aircraft development, aiming to make travel faster and improve social and economic growth in America. They're pushing for supersonic travel to bring the excitement back to flying.
  2. The FAETON-I fusion device from Fuse Energy is a big step toward making fusion energy a reality, with some impressive outcomes that could change the future of energy production. This could lead to safer world and more available energy for everyone.
  3. Chai Discovery's new AI model, Chai-2, is revolutionizing how antibodies are designed, making the process faster and more efficient. This advancement could lead to better treatments for diseases much quicker than before.

Space Ambition 1st Anniversary: We Got a Bit Closer to the Stars

Space Ambition • 279 implied HN points • 15 Sep 23
🔬 Science Aerospace
  1. Space Ambition attracted over 8,000 readers and completed more than 50 research projects in its first year. It's great to see such a big community focused on space and technology!
  2. The team believes that space technology can solve many of Earth's problems and aims to make it more understandable and accessible for everyone. They want to connect space with everyday life.
  3. Readers have shared inspiring stories about how the blog has influenced their careers, which shows the positive impact of their work in the space sector. It's awesome to see people motivated to pursue their dreams!

Italy: A Rising Star with Significant Contributions to the Space Industry

Space Ambition • 259 implied HN points • 22 Sep 23
🕹 Technology Aerospace
  1. Italy has a strong aerospace industry, especially in Turin, which is a major global hub with over 160 companies and thousands of workers. It plays a key role in space projects, including working on the International Space Station.
  2. Italy is an important player in the European Space Agency, contributing significant funding and securing contracts for projects like Earth observation satellites and lunar studies. This shows Italy's growing influence in the space sector.
  3. The Italian space community is supported by a mix of government, academic institutions, and private companies. This collaboration helps foster innovation and growth among startups in the space industry.

Wings Over India: Manufacturing Our Aviation Future

Tigerfeathers! • 37 implied HN points • 21 Nov 25
💼 Business Aerospace
  1. India has a rich history and potential in aviation, but has mostly imported planes instead of building its own. It needs to revive its aviation manufacturing to not just operate, but also create aircraft.
  2. Building aircraft can boost India’s engineering talent and confidence, making the country more self-reliant. This is key for both economic growth and national security, especially when it comes to defense.
  3. Investing in aircraft manufacturing can bring economic benefits, reduce travel costs, and inspire future generations to dream bigger. India has the talent, but it needs to take bold steps to realize its aeronautical ambitions.

Demystifying ArianeGroup

Europe in Space • 216 implied HN points • 06 Mar 23
🕹 Technology Aerospace
  1. ArianeGroup and Arianespace are not the same - there's a difference.
  2. ArianeGroup's history and subsidiaries show a complex web of operations beyond just rockets.
  3. Concerns about the lack of success and strategic planning at ArianeGroup.

Spotlight: John Bucknell – CEO of Virtus Solis

Space Ambition • 199 implied HN points • 04 Aug 23
🕹 Technology Aerospace
  1. Virtus Solis is working on space-based solar power satellites. These can provide continuous energy, unlike traditional solar panels that depend on sunlight.
  2. The technology aims to solve global energy challenges by making clean energy accessible and affordable for everyone, reducing reliance on fossil fuels.
  3. John Bucknell, the CEO, suggests that starting a business early in your career can make it easier, but experience also helps in understanding how to manage teams and solve problems.

Jet Propulsion: Evolution of Technology & the Future of Interplanetary Travel. Part 1.

Space Ambition • 319 implied HN points • 14 Apr 23
🕹 Technology Aerospace
  1. Jet propulsion is a key technology for space travel. It works by pushing gas out one way to move in the opposite direction, based on Newton's third law.
  2. There are two main types of engines: high-thrust engines for fast launches and low-thrust engines for long, efficient journeys in space. Each type has its own use depending on the mission.
  3. The market for propulsion systems is growing rapidly, with innovations like 3D printing helping to make production cheaper and more efficient. This growth is driven by increasing satellite launches and the need for better space technology.

Spotlight: Noemie Alliel – Managing Director @ Starburst

Space Ambition • 219 implied HN points • 30 Jun 23
🕹 Technology Aerospace
  1. Starburst Aerospace runs accelerator programs to help startups connect with large companies and secure funding. These programs provide valuable services and expertise to entrepreneurs without requiring direct investment.
  2. Successful startups often need a strong team and a well-researched idea, along with the ability to communicate their vision clearly. Investors look for uniqueness, innovation, and a solid understanding of the market.
  3. Emerging trends in the space industry include remote sensing, in-space manufacturing, and food production in space. These areas hold potential for significant growth and investment opportunities.

Spotlight: Adrien Michaud – Rocket Lab Space Ambassador

Space Ambition • 319 implied HN points • 03 Mar 23
🕹 Technology Aerospace
  1. Space tech isn't just for engineers; there are many paths into the industry. You can find roles in areas like HR or business development even if you don’t have a traditional aerospace background.
  2. The future of space tech may resemble civil aviation or the car industry, with either a few big players or many smaller companies. This means a lot of new ideas and technologies may emerge, but they also need solid ways to make money.
  3. Watching inspiring films like Apollo 13 can ignite passion for space and problem-solving. Many people find their calling early and choose careers that let them work on real-world challenges in space tech.

Weekly Dose of Optimism #146

Not Boring by Packy McCormick • 97 implied HN points • 30 May 25
🕹 Technology Aerospace
  1. A startup called Orchid helps parents select embryos with lower disease risks using genetic testing. This raises both hope for healthier babies and ethical questions about how much we should design our kids.
  2. Doctors successfully transplanted a gene-edited pig kidney into a man, helping him avoid dialysis. This could change the future of organ transplants, as pig organs might be a solution to the shortage of human donors.
  3. Radiant, a nuclear startup, raised $165 million to develop a small reactor that can power remote areas and possibly aid in future Mars colonization. This shows growth in clean energy innovations.

Space Launch technology: are we stuck?

Space Ambition • 399 implied HN points • 21 Oct 22
🕹 Technology Aerospace
  1. Many companies in the space launch industry are not innovating much. They are mostly making small changes to old ideas instead of developing new technologies.
  2. The space launch market is complex and requires a lot of money and time to create viable products. This makes it hard for new businesses to compete with big players like SpaceX.
  3. There are new ideas in space launch technology that may change how we send things into space. Some companies are exploring different methods, like using external energy sources, which could make launches more efficient.

Balloon Trials

Wars Of Future Past • 137 implied HN points • 24 Feb 23
🕹 Technology Aerospace
  1. Spy balloons have a long history of surveilling humans dating back to 1794.
  2. Biden addressed the recent surge in UFO sightings and balloon shoot-downs.
  3. The increased frequency of sightings and shoot-downs raises questions about object detection capabilities.

Chinese Commercial Aircraft Reading List

Construction Physics • 208 implied HN points • 23 Oct 24
🕹 Technology Aerospace
  1. Learning about China's aircraft industry can be challenging, but there are valuable resources available. These include government reports, media articles, and books that cover the topic.
  2. RAND reports are particularly useful for understanding the progress of Chinese aerospace. They provide in-depth analysis on various aspects of commercial aircraft manufacturing in China.
  3. If you're interested in this field, starting with reputable reports can give you a solid foundation, even if they are not easily readable like a typical book.

South Bay LA is Ground Zero for the Hard Tech Wave and Here's Why

Nathan’s Substack • 79 implied HN points • 15 Dec 23
🕹 Technology Aerospace
  1. South Bay LA, including areas like Redondo Beach, El Segundo, and Torrance, is experiencing a boom in hard tech innovation. The region is home to a growing number of young founders and engineers leveraging decades of experience and innovative tools from companies like SpaceX.
  2. The concentration of talent in South Bay is reminiscent of Richard Florida's theory on talent clusters, where talent attracts more talent, leading to a cycle of innovation and success. The region's history in aerospace has also played a significant role in shaping this talent pool.
  3. The alumni networks of SpaceX and Tesla have significantly contributed to the entrepreneurial spirit in South Bay, with many new hard tech companies emerging from these connections. The presence of these networks has made South Bay a hub for hard tech innovation and collaboration.

News from Space Ambition

Space Ambition • 79 implied HN points • 01 Dec 23
🕹 Technology Aerospace
  1. Space Ambition hosted a successful pitch session with 11 startups and over 25 investors from around the world. It was a great opportunity for entrepreneurs to showcase their innovative ideas.
  2. A spacetech internship for high school students in Singapore gave them hands-on experience in venture capital and inspired them to consider careers in the aerospace sector. Learning directly from experienced professionals can really spark interest in young minds.
  3. The recent Spacetech meet-up connected people online and offline in six countries, focusing on important aerospace topics. Events like these help build a community and keep passion for space exploration alive.