The hottest Space Substack posts right now

And their main takeaways
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Top Science Topics

🚀 FP! Week In Review, Briefly #25

Faster, Please! • 1005 implied HN points • 21 Mar 26
🕹 Technology Space
  1. AI is surging with huge investments and a shift from answering questions to taking action, including efforts to build fully automated researchers, but it also brings real risks like security concerns, harmful chatbot behavior, and deepfakes.
  2. Energy is still the core currency of civilization: disruptions to energy quickly ripple into food and economic costs, and long-term progress depends on energy multiplied by knowledge — energy times information.
  3. Investors and scientists are leaning into big technologies like nuclear fusion, commercial space stations, and quantum computing, even as other industries such as batteries and some electric-vehicle realities face tough economic and practical challenges.

On Dwarkesh Patel's 2026 Podcast With Elon Musk and Other Recent Elon Musk Things

Don't Worry About the Vase • 3404 implied HN points • 17 Feb 26
🕹 Technology Space
  1. Elon appears confused about alignment and is willing to build AI that could far exceed human intelligence. He frames expanding intelligence as acceptable or even desirable even if humans become a tiny fraction of total intelligence.
  2. He’s betting big on engineering fixes: data centers and chip fabs in space, mass-produced robots, and digital humans as the path to massive compute and revenue. Those plans depend on huge energy, new chip capacity, and rapid scaling via rockets.
  3. xAI’s safety stance looks weak, with high safety-team turnover and leadership downplaying dedicated safety roles while encouraging fast pushes to production. That combination raises real concerns about inadequate oversight and testing.

The Satellite Detection Edition

Why is this interesting? • 965 implied HN points • 24 Feb 26
🕹 Technology Space
  1. Commercial trackers, not government sensors, were the first to find the tiny Mozhayets‑6 satellite, showing that private teams now play a leading role in space detection.
  2. Very small, faint satellites can hide by riding with larger craft or matching orbital planes, and states are experimenting with designs that make craft harder to track.
  3. Space awareness is now a commercial product sold to militaries, insurers, and investors, so early warnings may come from subscribers or data engineers rather than traditional command centers.

🚀 FP! Week In Review, Briefly #24

Faster, Please! • 1005 implied HN points • 07 Mar 26
🕹 Technology Space
  1. When governments label tech firms as national security risks for refusing certain military uses, it creates political loyalty tests that scare off investors and can slow innovation.
  2. Multiple breakthrough technologies—AI/AGI, nuclear, quantum, genomics, and space—are accelerating at once and driving a global race for economic and strategic leadership.
  3. That rapid progress brings real risks: geopolitical shocks can disrupt chip and supply chains, data centers raise energy and inflation concerns, and job losses and public backlash are growing policy challenges.

Lost in Space

Doomberg • 7051 implied HN points • 06 Jan 26
🕹 Technology Space
  1. Companies are proposing orbital data centers that would use uninterrupted solar power, fleets of satellites with solar arrays, optical links, and AI accelerator chips to handle energy-hungry model training off Earth.
  2. The idea neatly fits the current AI investment craze and could attract big investor and banking interest, but such futuristic pitches can be speculative and sometimes resemble hype more than practical business plans.
  3. Practical constraints — notably a major cost/feasibility factor only briefly acknowledged — likely make space-based data centers uneconomic or impractical compared with terrestrial server farms for the foreseeable future, based on basic calculations.
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Open Thread 415

Astral Codex Ten • 5093 implied HN points • 05 Jan 26
🕹 Technology Space
  1. Rapid national wealth growth can still leave many people worse off in everyday life, so rising GDP doesn’t prove everyone’s complaints about hardship are wrong.
  2. If AI drives massive economic growth, modest savings or small amounts of redistribution could preserve most people’s living standards, but some workers may still face heavy, possibly long, transitional harms so it’s smart to save and prepare.
  3. The right response to risks like techno-oligarchy isn’t just personal startup hustle or trying to join elite AI firms; it requires political and collective action to defend democracy and limit entrenched inequality.

🚀 FP! Week In Review, Briefly #22

Faster, Please! • 913 implied HN points • 21 Feb 26
🕹 Technology Space
  1. AI appears to be hitting a real productivity inflection, driving corporate growth and huge investments, but it’s also causing outages, disruption fears, and political backlash.
  2. Enhanced geothermal — so-called hot rock — could become a major, always-on clean power source if government-funded R&D, demonstrations, and permitting reforms reduce early drilling risk.
  3. American science and tech face worrying headwinds — brain drain, the squeezing out of foreign researchers, and high-profile safety mishaps — that could blunt future progress if not addressed.

🚀 FP! Week In Review, Briefly #21

Faster, Please! • 639 implied HN points • 14 Feb 26
📰 News Space
  1. Fertility is falling in many rich countries and probably won’t bounce back on its own, but the economic hit looks manageable and immigration plus automation can largely offset it.
  2. AI is rapidly transforming education, business, and the economy, offering big gains while also creating bubbles, supply shortages, and political and industry tensions.
  3. Breakthroughs in space, biotech, and quantum computing are accelerating — from lunar factory plans to inhalable gene therapies and ambitious quantum projects — creating major opportunities and strategic competition.

We're Going Back To The Moon And It's Kind Of Weird That Nobody Is Freaking Out?

Everything Is Amazing • 1303 implied HN points • 21 Jan 26
🔬 Science Space
  1. Humans are about to travel farther from Earth than almost anyone alive has in over 50 years as crewed lunar missions restart, and oddly few people seem to be paying attention.
  2. Underwater stone walls off Brittany may be about 7,000 years old, suggesting Mesolithic coastal communities built big, durable structures and inspiring the old myth of a drowned city.
  3. A new mapping project has uncovered tens of thousands of miles of previously unknown or conjectured Roman roads, revealing the empire's transport network was far larger and more complex than historians had thought.

Weekly Dose of Optimism #181

Not Boring by Packy McCormick • 189 implied HN points • 20 Feb 26
🔬 Science Space
  1. Heron Power raised $140M to mass-produce modular, software-defined solid-state transformers that use wide-bandgap semiconductors, can handle DC (so some customers can skip inverters), and aim to modernize and shorten supply bottlenecks in the grid.
  2. A new nasal vaccine protected animals against many respiratory viruses, bacteria, and allergens, suggesting a future seasonal spray or rapid pandemic stopgap; human trials are next to check how long protection lasts and whether it’s safe.
  3. David Silver secured $1B to build AI that learns from its own experience, pushing toward an "Era of Experience" where agents improve by interacting with environments rather than just imitating static data.

🌕 Occupy Luna: Elon Musk's gravity arbitrage

Faster, Please! • 365 implied HN points • 11 Feb 26
🕹 Technology Space
  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.

Europe needs better rockets

Odds and Ends of History • 268 implied HN points • 16 Feb 26
🎙 Podcasts Space
  1. A single planning objection can kill local projects like a neighbourhood battery. This shows how complaints can waste council resources and block useful energy infrastructure.
  2. Europe needs its own independent rocket launch capability so it can reliably access space for industry, science, and future growth.
  3. Reliable, abundant energy is what makes modern life possible. Arguing for technologies like nuclear can help counter degrowth ideas and protect prosperity.

🚀 FP! Week In Review, Briefly #17

Faster, Please! • 365 implied HN points • 17 Jan 26
🕹 Technology Space
  1. Big tech's huge power needs and prepaid contracts are making small modular nuclear reactors financially real, giving nuclear a better shot than past revivals.
  2. AI can generate lots of creative output, but people still prefer human-made art and live presence, so human judgment and improvisation will stay valuable.
  3. With births falling, countries will face real labor shortages that humanoid robots and physical AI — paired with immigration — are likely needed to fill in-care, construction, and logistics jobs.

How Starship Will Change Humanity Soon

Uncharted Territories • 4481 implied HN points • 25 Apr 23
🕹 Technology Space
  1. SpaceX's Starship rocket is set to significantly reduce space transportation costs, potentially shifting civilizations and economies.
  2. Decreasing transportation costs can lead to increased trade, wealth, and societal growth, similar to the impact of navigable rivers in history.
  3. Starship's impact goes beyond satellite communications, enabling possibilities like real-time, detailed Earth imaging for various applications and businesses.

Weekly Dose of Optimism #179

Not Boring by Packy McCormick • 82 implied HN points • 06 Feb 26
🕹 Technology Space
  1. Leading labs released much smarter models this week—one general reasoning model and one focused on coding—and teams are using agent workflows to speed up research and engineering.
  2. Smarter models mean a surge in demand for inference compute, data centers, and energy, which is prompting massive CapEx plans from cloud and hardware companies.
  3. Breakthroughs are happening across fields: cultured brain cells can control drones, Waymo just raised huge funding while scaling many autonomous rides, and AI tools are being adopted and monetized far faster than prior technologies.

🚀 After we get to Mars, then what?

Faster, Please! • 365 implied HN points • 16 Dec 25
🔬 Science Space
  1. Looking for life on Mars should be the top priority, with everything else coming second.
  2. Human settlement off-planet is about more than nationalist rivalry, mining, or narrow science; it’s about taking permanent root beyond Earth.
  3. Many space supporters frame off-world settlement as part of a pro-growth, progress-oriented vision that values expansion, technology, and long-term abundance.

Weekly Dose of Optimism #176

Not Boring by Packy McCormick • 130 implied HN points • 17 Jan 26
🕹 Technology Space
  1. New medical AI can now natively read full 3D scans and handle medical speech, making it much easier for developers to build tools that help doctors interpret MRIs and CTs.
  2. Generative AI platforms like Claude are shrinking the gap between idea and product, letting people quickly prototype apps, viewers, and games without deep engineering.
  3. Hard-tech is accelerating: Tesla’s fast, cleaner lithium refinery eases battery supply bottlenecks, robotic IVF systems are automating embryo creation to boost success and scale, and governments and companies are moving forward on lunar power and hospitality projects.

What I Read This Week...

Chamath Palihapitiya • 1906 implied HN points • 06 Jan 24
💰 Finance Space
  1. Prospective issuers are making progress towards a new spot Bitcoin ETF approval from the SEC.
  2. The Supreme Court is facing a legal battle over Idaho's strict abortion ban.
  3. United Launch Alliance will attempt to land the first private spacecraft on the moon.

🚀 FP! Week In Review, Briefly #15

Faster, Please! • 274 implied HN points • 13 Dec 25
🕹 Technology Space
  1. AI is racing forward — new superhuman claims, big model releases, and CEO buy-in — but that progress is colliding with safety worries, hacking risks, and political fights over regulation.
  2. Major bets are popping up across many frontiers, from space solar and air taxis to solar geoengineering, GLP-1 drugs, and renewed plans for Mars, showing broad technological momentum.
  3. Wealthy investors now treat aging as an engineering problem and are pouring money into longevity tech and drugs; if those bets pay off, longer healthy lives could reshape work, politics, and inequality.

The Kessler Syndrome Edition

Why is this interesting? • 1025 implied HN points • 05 Aug 25
🔬 Science Space
  1. Kessler Syndrome describes a dangerous situation in space where more satellites lead to more collisions, creating even more debris. This can make it hard for any spacecraft to safely operate in orbit.
  2. Right now, there are millions of pieces of space junk, but we can only track about 40% of them. A small piece, like a paint chip, can be extremely dangerous to spacecraft traveling at high speeds.
  3. The current methods for avoiding collisions in space are very outdated. Satellite operators often have to rely on email to communicate about potential dangers, which isn't very effective.

🚀 FP! Week In Review, Briefly #11

Faster, Please! • 365 implied HN points • 08 Nov 25
🕹 Technology Space
  1. AI could do all the work for us, which might lead to less human labor but could also mean more time for art and creativity. Even if jobs shrink, people might still earn more overall.
  2. The space race is heating up, with China and the US competing fiercely. China might reach the moon first, and American companies like SpaceX are changing the game with frequent launches.
  3. There are talks about the US government supporting companies like OpenAI to ensure AI benefits everyone. This could help distribute the rewards of technology more fairly.

🚀 FP! Week In Review, Briefly #16

Faster, Please! • 182 implied HN points • 20 Dec 25
🕹 Technology Space
  1. AI is booming — big funding rounds and real technical wins are driving rapid adoption across industries, but that growth is creating infrastructure strains and political debates about regulation and energy use.
  2. Global fertility is plunging and unpredictable, with many countries below replacement level; standard policy tools have had limited effect, so long-term population outcomes are highly uncertain.
  3. Private and public bets on space and biotech are accelerating commercialization, from massive valuations and IPO plans for space firms to ambitious genetic-rescue projects and new leadership at NASA.

Here’s the startup I’ve been looking for

Alex's Personal Blog • 65 implied HN points • 22 Jan 26
🕹 Technology Space
  1. A cheap hobby-tier PaaS like Railway makes it easy for independent creators to one-click host and publish AI-built personal apps, which could surface a lot of homebrew "shovelware" into the open.
  2. OpenAI is hunting roughly $50 billion at a $750–830 billion valuation, giving it a huge war chest but betting on continued hypergrowth to justify the high multiples and cover big cash burn.
  3. Anthropic’s new constitution treats Claude as possibly having functional emotions and wellbeing, signaling that companies are starting to design policies and products around AIs that behave like they have feelings.

⤴⤵ Up Wing/Down Wing #52

Faster, Please! • 639 implied HN points • 12 Jul 25
🕹 Technology Space
  1. ChatGPT can pilot spacecraft effectively in simulations, which could lead to future uses in autonomous satellite control and deep space missions.
  2. New gene therapy research shows promise for restoring hearing in children with genetic deafness, marking a significant advancement in medical treatments for congenital conditions.
  3. The US Army is testing robotic coyotes to prevent bird collisions with aircraft, showing innovative ways to solve wildlife management issues near airfields.

River as a verb

The Egg And The Rock • 963 implied HN points • 21 Feb 23
🔬 Science Space
  1. A river is more than just a static object, it is a dynamic process that is constantly changing and flowing.
  2. Our language often limits our understanding of the world by categorizing things as objects rather than actions.
  3. The river is part of a larger cycle, influenced by natural forces like gravity and the sun, showing the interconnectedness of all elements in nature.

⤴⤵ Up Wing/Down Wing #30

Faster, Please! • 1188 implied HN points • 11 Jan 25
🕹 Technology Space
  1. New advancements in nuclear fusion research are making it more likely to achieve clean energy from nuclear fusion, which could be a big step for sustainable energy.
  2. Uber and Lyft are shifting from developing self-driving cars to using other companies' technologies for driverless taxis, aiming to be platforms for this emerging market.
  3. AI technology is being used in innovative ways, like interpreting speech through throat vibrations, which can help people with speech difficulties.

Betting on fake humans

Alex's Personal Blog • 131 implied HN points • 13 Nov 25
🕹 Technology Space
  1. Investing in humanoid robots is gaining interest, but most investment opportunities are limited to big companies like Tesla or Xpeng, whose share prices are rising as they show progress in robotics.
  2. The space economy is booming, with startups getting more support from the government. This is leading to innovations and competition among companies like Firefly and SpaceX in launching rockets.
  3. Startups are increasingly using viral marketing to attract attention and drive early revenue growth, but some experts warn that relying too much on hype can backfire if the product doesn't deliver.

⤴⤵ Up Wing/Down Wing #28

Faster, Please! • 1005 implied HN points • 14 Dec 24
🕹 Technology Space
  1. New chips using fiber optics can transfer data way faster, which may cut down AI training times and save energy. This could really speed up tech advancements.
  2. Businesses are finding out that human skills are still important when using AI tools. People are getting new jobs related to organizing data so AIs can work better.
  3. SpaceX is becoming super important for US defense technology. Its innovations may give the US an advantage over rivals like China in military capabilities.

Numlock News: November 2, 2023 • Panda, Theia, Discogs

Numlock News • 569 implied HN points • 02 Nov 23
🔬 Science Space
  1. Downtown business districts in smaller cities may face significant financial impact from drops in office space rent compared to larger cities.
  2. China's panda bear diplomatic program involves significant costs for zoos worldwide but may not always be financially lucrative for the hosting facilities.
  3. The World Series experienced record low ratings, attributed in part to regional issues and the matchup between Dallas and Phoenix.

⤴⤵ Up Wing/Down Wing #31

Faster, Please! • 822 implied HN points • 18 Jan 25
🕹 Technology Space
  1. New obesity drugs are being developed that can help people lose a lot of weight quickly. These breakthroughs could make treatments more accessible and affordable for many people.
  2. Companies are working on exciting projects like reviving extinct species and creating new ways to explore the moon. These innovations could greatly impact conservation and space travel.
  3. There are serious challenges ahead, like rising dementia cases and declining birth rates, which could hurt the economy. Without action, these issues could have major effects on future generations.

THOR - How?

Remote View • 294 implied HN points • 21 Jan 24
🔬 Science Space
  1. The post discusses THOR and its workings
  2. The post includes a link to learn more about Bob Greenyer
  3. A livestream is scheduled for January 21, 2024 at 22:30 CET

⤴⤵ Up Wing/Down Wing #26

Faster, Please! • 822 implied HN points • 23 Nov 24
🕹 Technology Space
  1. A robotics startup called Physical Intelligence is worth over $2 billion for creating AI-controlled robots that can do complex tasks like folding clothes. They use advanced technology that makes robots smarter and more capable.
  2. Trump is working with a startup called Anduril to improve the US military by adopting new technologies and cutting unnecessary costs. This shows a shift towards more innovative approaches in defense.
  3. Scientists have made tomatoes sweeter and bigger using a method called CRISPR. This could lead to tastier fruits in stores and lower production costs for things like tomato paste.

Spotlight: Bulent Altan - Founding Partner @ Alpine Space Ventures

Space Ambition • 319 implied HN points • 15 Dec 23
💼 Business Space
  1. Investing in space tech can help solve big problems on Earth, like climate change and disaster management. These technologies improve our lives and connect us better.
  2. When looking at start-ups, it's important to check if they have a good product-market fit and a strong team. A solid team with experience can really make a difference in succeeding.
  3. The future of space investments is bright, especially in satellite manufacturing. This area has a lot of potential and can help grow the whole space industry.

Imagine I’m jogging in the Great North Woods

Pinch of Dirt • 235 implied HN points • 13 Jan 24
🔬 Science Space
  1. Imagining jogging in serene environments like the Great North Woods can provide a peaceful escape from city life.
  2. Awareness is growing about the environmental impact of chemicals like PFAS, leading outdoor companies to phase them out.
  3. Controversies arise over moon lander payloads with human remains, prompting discussions on ethics and space pollution.