石亀一郎

@CislunarTech

[Morgan Stanley @MorganStanley]

Today, @SpaceX (Nasdaq: SPCX) makes its public market debut with a $75Bn offering (pre-greenshoe) at $135 per share, marking the largest IPO in history.

Congratulations to the SpaceX team. We are honored to serve as joint lead bookrunner and sole stabilization agent.

[Engineering at Meta @Meta_Engineers]

We’re announcing two new partnerships to bring innovative energy generation and storage to our data centers:

1/ 🛰️ Space Solar: Partnering with Overview Energy to beam up to 1 GW of space solar power from orbit to Earth for around the clock power production.

[SpaceX @SpaceX]

Three years since the first flight of Starship, the next generation is here. New ship. New booster. New engines. New pad and new test site. SpaceX engineers are working to solve one of the most difficult engineering challenges in history: developing a fully, rapidly reusable rocket

[X @X]

To the future of humanity!

https://t.co/oupCYfy2cf

[SpaceX @SpaceX]

SpaceX has acquired xAI, forming one of the most ambitious, vertically integrated innovation engines on (and off) Earth → https://t.co/3ODfcYnqfg

[桒原聡文（Prof. Dr. -Ing. Toshinori Kuwahara）/ "Doc." @Prof_Kuwahara]

この度の 東北大学「スペースクロステック研究センター」の設置に際しまして、プレスリリースをさせて頂きましたので、その旨ご報告させて頂きます。

持続可能な宇宙活動の実現と宇宙経済の更なる発展を目指し、産学共創宇宙研究開発活動に、より一層力を入れて参ります。
https://t.co/Qw1zg1zLgo

[Claude @claudeai]

Introducing Cowork: Claude Code for the rest of your work.

Cowork lets you complete non-technical tasks much like how developers use Claude Code.

[Curiosity @MAstronomers]

It took 9 years and 3 billion miles to get this shot.

Pluto’s icy Mountains.

[NASA Administrator Jared Isaacman @NASAAdmin]

Today, President Trump established the most significant national space policy since the Kennedy era.

@POTUS made a commitment to return to the Moon, establish an enduring presence, invest in the technology of the future and pursue the secrets of the universe.

@NASA, with a relentless focus on the mission, will lead in the peaceful exploration of space and we will NEVER come in second place.

Under this administration, we will continue to lead with the world in space exploration with purpose and ambition.

[石亀一郎 @kzigm]

SpaceX上場へ

[Elon Musk @elonmusk]

@SciGuySpace As usual, Eric is accurate

[戸谷友則 (TOTANI, Tomonori) @tomonoritotani]

https://t.co/dsEJlcY7b5 東大からプレスリリースをさせていただきました。BBC, NBC, Guardian, Newsweek 含め、altmetric のよると世界中の40以上のメディアに取り上げられたようですが、日本のメディアからは華麗にスルーされたので今日はふて寝します

[石亀一郎 @kzigm]

本当に良い試合でした！ありがとう！

[MLB @MLB]

FULL INTERVIEW: Yoshinobu Yamamoto talks after being named the 2025 #WorldSeries MVP 👏

[Patrick Collison @patrickc]

A recent reflection, based on conversations with economists and policy leaders, is that there are two superficially similar but importantly different perspectives one can hold with respect to US manufacturing:

* Affinity for manufacturing and physical production is an anachronistic fetish, embodied by populists with outdated attraction to hard hats and clanging forges. A great deal of manufacturing has departed the US, which is certainly fine and probably even quite good. It's unpleasant labor, and countries ought to each specialize in their respective comparative advantages.

* Manufacturing is the ultimate network effects and economies-of-scale business. As services are substituted by AI, and as datacenter deployment accelerates, the relative importance of manufacturing is likely to grow. To think that one can pick and choose sectors in which one will excel ("let's win in drones but not in dishwashers") is a fallacy. Manufacturing is hence of paramount strategic importance. However, we don't know how to make the US the world's preeminent manufacturing power (given its cost base and given the current center of gravity in China) -- indeed, we don't know whether it's even possible -- and this is a significant strategic problem for the country.

I have zero direct expertise here, but my outside view is closer to #2 than #1: it seems that the ecosystems and supply chains create strong gravity across the board. I also asked @elonmusk, who has clearly done more over the past decade to advance sophisticated US manufacturing than anyone else, and this appears to be his view. Most economists, on the other hand, are much closer to #1, and I don't think that the economics profession considers the absence of good ideas for reviving US manufacturing to be a problem of particular significance. (There are lots of snide epithets about the efficacy of industrial policy.) It seems to me that there's even some amount of backwards reasoning happening, where, because we don't know how to do #2, #1 is subconsciously a much more comfortable position to hold.

Talking about winning particular manufacturing sectors feels to me a bit like talking about winning individual biological research sectors or winning particular software sectors. That is: it seems that the strong default assumption should be that "the place that is best at biology research sector X will also be best at sector Y", and similarly in software, because the skills and inputs needed are so transferable. As such, my guess is that if the US seeks meaningful sovereignty or preeminence in any of drones, robotics, solar, batteries, pharma, etc., we need to bite the bullet, and win at manufacturing across the board.

Overall, I'd love to read more arguments for and against these perspectives, particularly from those with direct expertise.

[Tetsuro Miyatake @tmiyatake1]

Googleがスプレッドシートのセルごとで何をアウトプットさせるのかをGoogle Geminiにお願いできるようになった。

例えば特定のセルに書かれている内容をベースにテキストを生成するように指示ができる。

https://t.co/9fkuOUWfqA

[石亀一郎 @kzigm]

RT @que_music: SPACE NOMAD（Original Soudtrack）
2025.4.2 Release
https://t.co/LKgeG8aWni

[Firefly Aerospace @FireflySpace]

Watch Firefly land on the Moon! After identifying surface hazards and selecting a safe landing site, #BlueGhost landed directly over the target in Mare Crisium. A historic moment on March 2 we'll never forget. We have Moon dust on our boots! #BGM1

[Cislunar Technologies @CislunarTech]

【増床のお知らせ】
この度、組織拡大に伴い本社が入居する東北大学青葉山ユニバース内にて増床を致しました。
https://t.co/uF6PSlBCDn

[Steve Jurvetson @FutureJurvetson]

https://t.co/wO4QyGtcLM “The rumble you feel, the sonic booms of reentry, it's just a visceral feeling that captures so much potential energy, literally and figuratively, the potential in that launch and the potential for humanity to go out and live in space and to explore the frontiers of the unknown.” — my favorite line in today’s movie release by @JaysonJoyRide.
We discuss SpaceX, Planet and a bunch of new New Space startups. Enjoy!

[Polaris @PolarisProgram]

Liftoff of Polaris Dawn!

[Elon Musk @elonmusk]

The first Starships to Mars will launch in 2 years when the next Earth-Mars transfer window opens.

These will be uncrewed to test the reliability of landing intact on Mars. If those landings go well, then the first crewed flights to Mars will be in 4 years.

Flight rate will grow exponentially from there, with the goal of building a self-sustaining city in about 20 years. Being multiplanetary will vastly increase the probable lifespan of consciousness, as we will no longer have all our eggs, literally and metabolically, on one planet.