It would be quite a challenge to build a car with a 1000 Km long rigid battery.

One solution would be to mount the battery vertically. It would cause problems with aviation and satellites, and would require abolishing all underpasses and removing overhead cables. It should have a ligthning port a few Km from the ground, for free fast charging during thunderstorms. Balancing this battery so it doesn't tip over would be tricky, but if Segways can be balanced, so should this. It would have to be a cutting edge battery with no wind resistance.

The geometrical problems with mounting such a battery horizontally are formidable. The battery should be curved to the curvature of the earth, otherwise the ends would have a 20 Km altitude difference from the middle. City blocks would need to be at least 1000 Km long, and would fit only one car on each side for street parking. A car could avoid making U-turns by having its cabin rotate 180 degrees, instead of turning the whole car. It could also slide on rails along the length of battery, so as to avoid moving the whole battery for short trips down the street (less than 1000 Km). If we continue thinking along these lines, out of the box, we could embed the batteries in the streets, and have the cars move around freely on top, getting power from the batteries on the fly.

If the batteries are not rigid, then we have a lot of flexibility. A 1000 Km flexible thin battery could be coiled up to fit anywhere.

I'm more interested in how Go went from #7 in July to #15 in April, just above Rust, in the TIOBE index. Go is much easier than Rust to learn and use. Comparing Rust and Go in the charts, the Rust ratings have mostly been going up since 2017, while Go seems to have stayed flat, with the exception of two spikes.

https://www.sciencedirect.com/...

The produced oxygen and other materials can be stored, therefore there is no need to store the energy in batteries.

There is also a solution to providing continuous solar power without batteries, if the base is near a pole. Put solar panels in a circle around the pole, so that at any given time, some of the panels are in sunshine. I read a paper abstract about this that said the panels should be at 87 degrees latitude (about 100 miles from the pole). I don't know why. It seems feasible.

I'm looking at the JSON files downloaded by https://www.nasa.gov/missions/...

I see a bunch of parameters like this:

"Parameter_5016": { "Number": "5016", "Length": "8", "Status": "Good", "Time": "2026:092:20:15:40.398", "Type": "2", "Value": "78029" },

I wish it were a bit more explanatory.

From the NASA website: "Among the tasks is a checkout of the toilet."

I meant searching for the UPC code in the store's own inventory system, not in the general internet. There are other ways of doing it than downloading a separate app for each store. For starters, it could easily be done by a web search on the store's webpage. I would scan the code on any QR code scanning app, and then paste the UPC on a search field in a webpage that I could easily find in the store. It would be easier to implement than dedicated hardware kiosks.

I'm surprised to find out that the Guinness Book of Records serves as a registry of scientific achievements. Here's the entry and a few other scientific records:
Smallest QR Code
Smallest Transistor
Lightest Black Hole
Brightest Star viewed from Earth

Ironically, the name of the university that made the feat, TU Wien, is not mentioned in the slashdot summary, but the Gunness Book of Records is.

The NASA news-release mentions "Skyfall payload of Ingenuityclass helicopters", for Mars. spacenews.com mentioned Moonfall instead. I wonder how they write their articles.

Rust depends on external libraries more than other languages do, because the Rust standard library does not include "core concerns such as async support, HTTP handling, and cryptography", as per the article. Languages like Java, and Go have large standard libraries that do all these things. Rust does not. I believe Rust has a philosophy of not wanting to commit to specific libraries, but instead let programmers pick the best libraries.

When I go to a store, I would like to be able to scan product UPC codes and see the current price for those products. This is also useful if the price tag is missing or if I can't read it, because it is too small, or too far (at the bottom shelf just above the floor), or because my eyesight is not sharp enough. Is this a lot to ask for?

I want to be able to do this this without installing the store's app, but with a 3rd party app (or my own). I also want to be able to scan the receipt and get an itemized price-list of what I bought.

Digital price tags are a convenience for the store. What I'm asking is a similar convenience for the customer.

Artificial light is already used for earth farming in some cases. But, to make use of the summary's "Solar" typo, I wonder if plants could also grow under the 28-day day cycle of the moon. If they could grow on 14 days of continuous light (artificial or not) and 14 days of darkness, then it would be easier to provide light for such a farm, either with natural sunlight, or via PV, without needing batteries or long power transmission cables.

There is a similar, but more informative article about growing Chickpeas on 75% moon soil.

These articles bring up interesting questions about circular farming. What would it take to build a closed ecosystem on the moon that does not require continuously shipping nutrients from earth?

Your computation assumes that you are storing 1 GW produced continuously for 24 hours. Solar power plants produce their nominal power only for a few hours each day. A good rule of thumb is 4 hours of nominal power per day. Therefore you need to divide your computed cost by about 6. If you also consider that a large portion of the power is consumed during the time that it is produced, the storage requirement is even lower. On the other hand, you may want more than overnight storage, for cloudy days. We recently read news about iron oxide batteries with 100 hours charge/discharge cycle, that may be more economical for several days worth of storage.

It says here, that "the spacecraft has used its remaining propellant to keep its solar panels pointed at the Sun and is now out of fuel." Why wasn't it using electric motors instead of propellant to orient the solar panels?