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"The anomaly originated at the main oxygen valve on one of the BE-4 engines."

After months of speculation, the companies formally announced the massive project will happen just north of Houston.

Here’s when some of this year’s most anticipated astronomical events will happen and the best way to observe them.

Builder Journal · Mars Environmental Dynamics Analyzer (MEDA) Virtual Sensor Recovery Ten times in a row I predicted what my next submission would score before I uploaded it. The worst miss was 0.0025 on a number around nineteen. I took that as confirmation that the physics underneath was correct. It was confirmation that I can do arithmetic. Two days before this competition closed I pointed a review at my own endgame, expecting notes about the code. It came back with three errors and none of them were in the code. All three were in my reasoning, and all three had the same shape: I had run something that felt like a measurement and was not one. This is the fourth entry in this series and the one I would keep if I had to burn the other three. The models are competition-specific. This part is not. The competition in one breath Perseverance carries an environmental station called MEDA. Some of its surface pressure readings are missing, and the competition is to reconstruct them. Scored on mean squared error. The wrinkle is the split. Training covers sols 1 through 100, when pressure is climbing toward its seasonal peak. Test covers sols 201 through 300, when it is falling hard toward the aphelion minimum. Sols 101 through 200 do not exist in either file. Every prediction is outside the range the model was fit on. The first entry covers the first submission, which contained no machine learning at all and took the top of the board at 61.04. Six weeks and seven versions later the public score was 18.99. Almost everything in between was selected by one signal. Not cross-validation. Cross-validation here can only hold out sols from the rising limb, so it is structurally blind to the regime I am scored on. The leaderboard was the only thing that could see the falling limb, so the leaderboard picked every scalar that mattered: the residual shrink, the blend weight, a constant seasonal offset, a diurnal scaling. Hold onto that. It becomes the joke about four hundred words from

Although no one captured a direct image of the impact, scientists have detected signals confirming the rocket hit the lunar surface. Orbiters could provide the first images of the crash site in the coming days.

SpaceX won't build large cell towers but plans small base stations across US.

Once, I had some questions about why SpaceX, Elon Musk's healthiest company, acquired xAI, his sickliest one. Now I have some questions about why we're calling the whole thing SpaceX. Look, what we have here, by revenue, is primarily a telecom company and a company that rents compute, according to SpaceX's first quarterly earnings statement […]

Shares slide in pre-market trading even as group says its quarterly revenues nearly doubled.

At the end of August, NASA is set to launch the Nancy Grace Roman Space Telescope from Kennedy Space Center in Florida. Its quest is to help us better understand how the universe works, from the glue-like dark matter that keeps galaxies together to the elusive dark energy that drives the expansion of the cosmos.…

SpaceX is preparing to build a terrestrial mobile network to "acquire quite a few" of the customers now subscribed to T-Mobile, AT&T, and Verizon. The message to compete head-to-head with the US carriers was delivered by SpaceX president Gwynne Shotwell and CEO Elon Musk during the Q&A section of the company's first earnings call. "The […]

Musk kept inflating the already-big promises being made by SpaceX CFO Bret Johnsen and Gwynne Shotwell on the company's first call.

The purchase illustrates just how interconnected Elon Musk's universe of companies are.

SpaceX's AI revenue grew more than three times to $2.6 billion from the year before, mostly because of deals that the company made to provide compute to other AI companies, according to SpaceX's quarterly earnings. The AI division, which the company said in its documents to go public was the source of most of its […]

SpaceX doubled its revenue compared to last year, according to its first quarterly earnings since going public in June.

Endeavour Optical Networks is planning to launch the fastest space laser communications system yet built.

The risk of more debris hitting the moon is on the rise as the space race heats up.

The orbiting observatory in minifigure scale.

A Louisiana launch site would offer several significant advantages.

If you want the best view of the 2026 solar eclipse, you'll need to travel to Spain or Iceland.

From how galaxies form to the beginnings of the universe, the images from the space telescope are giving cosmologists new data to explore—and theories to build out.