In an Oct. 9 letter to the FAA and Congress seen by SpaceNews, SpaceX principal engineer David Goldstein said the report relied on “deeply flawed analysis” based on assumptions, guesswork, and outdated studies.

The article contains details.

In 2021, the FAA commissioned the Aerospace Corp., a federally funded nonprofit focused on space, to provide a technical assessment of the rise of LEO constellations and the risks posed to aviation and people on the ground by unplanned and controlled reentries of these satellites and the upper stages that launch them.

Someone from Aerospace mentioned the difficulties in such an estimate, and Goldstein's letter points out more problems.

Good analysis, from all I've heard.

Anyone who keeps track of Elon Musk knows the world's richest man has a penchant for setting aspirational schedules for his companies....So, if you have an opportunity to interview him, why spend time asking Musk to prognosticate when one of his companies will do something years in the future?

and

SpaceX's brilliant engineers certainly have creative ideas and novel plans to get Starship to the Red Planet, so why not ask Musk about them when you have him for a rare hourlong one-on-one conversation? It's the how that is most interesting now, not the when or why, especially for an audience interested enough to tune in at the IAC.

and

But Mowry's questions missed the mark at a time when the Starship program is at a critical point, and he didn't probe with follow-up questions to tease out more insightful answers.

The whole article is worth a read, really.

Starlink @starlink Sep 23, 2023 · 9:29 PM UTC:

Starlink is available on all 7 continents, in over 60 countries and many more markets, connecting 2M+ active customers and counting with high-speed internet!

Thank you to all of our customers around the world 🛰️🌎❤️ → stories.starlink.com

The significance is as u/Obvious_Parsley3238 pointed out: "250k last march, 1 mil last december, 1.5 mil in may, 2 mil now".

I love this video.

I don't have a transcription to hand and shouldn't take the time to do it myself. The image alone:

https://nitter.net/pic/orig/media%2FF6VfGnVWYAAB5tv.jpg

The FAA asked the Fish and Wildlife Service for "re-initiation of Endangered Species Act consultation" due to the booster bidet. FWS has 135 days to give a final biological opinion.

SpaceX's social media people are really outdoing themselves lately. This video is, I think, the second one showing recent Starlink deployment. The mirrored surface reflected the second stage so well is stunning.

I saw this somewhere on Xitter or The Other Place. I hadn't heard that there had been any sort of re-evaluation or more documents. The first document is dated 14 April 2023, so just before the first test, IFT-1:

WRITTEN RE‐EVALUATION OF THE 2022 FINAL PROGRAMMATIC ENVIRONMENTAL ASSESSMENT FOR THE SPACEX STARSHIP/SUPER HEAVY LAUNCH VEHICLE PROGRAM AT THE BOCA CHICA LAUNCH SITE IN CAMERON COUNTY, TEXAS

Starship/Super Heavy Vehicle Ocean Landings and Launch Pad Detonation Suppression System

and following letters and documents are below it, dated as early as October 2022. 122 pages, oy vey, but a lot of repetition. I don't know enough to know whether there was anything significant, unless the FAA saying (paraphrasing) "these are some changes and considerations, but they don't have significant impact". There were changes expanding the landing zones, and more biological details, and lots more math about sound effects.

The first image, of Super Heavy + Starship at night reflecting the launch tower -- is astonishing. Image 1

Image 2: stack against a partly cloudy sky near sunrise

Image 3: towards the top of the stack near sunset

It's an interview with Brian Fuchs, a climatologist with the National Drought Mitigation Center, which publishes the Drought Monitor map. He talks about the center itself, He talks about how they determine drought, considering lots of different factors and their impacts. There's a distinction between short-term and long-term drought. He compares the current situation with 2011, which was actually the peak of a long drought that lasted until 2015 or so.

Article by Jacek Krywko, 13 September 2023. No intro here, but a much older article says "a science and technology writer based in Warsaw, Poland. He covers space exploration and artificial intelligence research, and he has previously written for Ars about facial-recognition screening, teaching AI-assistants new languages, and AI in space.".

WOW! I have no knowledge of the field, but it looks informative. As articles go, it's fairly long.

It's about efforts to get "bioregenerative life-support systems", living life-support systems as needed for long space journeys and bases over yonder.

The first efforts its lists were plant-based, BIOS (Soviet) and CELSS (US).

BIOS-3 experiments showed how much labor it took to operate this system. Results were bleak. Astronauts basically worked like full-time farmers just to keep it going.... There was very little control over what exactly the biological component was doing.

Then MELiSSA was proposed and implemented. It is bacteria-based. The great advantage is that each bacteria species does about one thing, and responds immediately to conditions, so humans can have much much more control. But it was a huge project:

The project quickly grew into a gargantuan effort backed by 14 countries and over 50 institutes, universities, and companies.

Then

In 2017, NASA founded the Center for Utilization of Biological Engineering in Space (CUBES), a conglomerate of federal agencies, industry, and academia, with the goal of building a demonstration biosystem for a future Mars colony....

While MELiSSA was focused on fine-tuning the hardware and software and left biology intact, CUBES involves engineering all three to make them work seamlessly together.

So bacteria-based, but now with genetic engineering. Also looking at producing more, like plastics or papers or more.

It talks about one drawback of that approach: "The problem is that life, when pushed, sometimes fights back." The changes for more productions of nitrites or fatty acids or whatever are not adaptive for the organism, so it has an incentive to mutate back towards its original if that can breed faster.

There's also discussion of multiple stages with more and more capability.

And also discussion of funding. MELiSSA has continuing funding and is looking for a human prototype. CUBES has had some design work, "with, like, $15 million USD in five years".

Anyway, well worth considering, and the comments are more valuable than in many comment sections. I did see fuzzyfuzzyfungus noting his own lay experience in existing bioreactors (amplifying a point above), specifically "the occasions when very, very unhappy science types announce that we'll be shutting down production because some undesired strain that's a lot less useful but a lot better at survival than the desired strain had snuck in and it was time to bleach out the tanks and sterilize everything to hell and back were just a thing that happened on occasion".

Edit: other items mentioned in the comments:

A City on Mars: Can we settle space, should we settle space, and have we really thought this through?: upcoming book from the Weinersmiths.

Thriving in Space: Ensuring the Future of Biological and Physical Sciences Research: A Decadal Survey for 2023-2032

Curiosity Finds Fairly Benign Radiation Environment on Mars

Covid on Mars: SF essay by Charlie Stross

This is related to @navi@lemmy.tespia.org's post about SpaceX no longer taking losses to produce Starlink satellite antennas. The article below refers to that one.

ArsTechnica, in "SpaceX projected 20 million Starlink users by 2022—it ended up with 1 million".

It's based on a Wall Street Journal article, which seems like a bit of a hit piece. The headline claim is absurd, as some comments pointed out: the projection was in 2015! It also points out that skeptics had always said that Starlink would not do well in cities, which would be a more valid criticism if Musk and Starlink didn't point it out first.

But there was this reported number:

Actual Starlink revenue for 2022 was $1.4 billion, up from $222 million in 2021, according to the report. The documents apparently didn't specify whether Starlink is profitable.

It mentions numbers that Shotwell had previous provided and that may have been reported here. I'll add them to have more data in one place:

SpaceX President and COO Gwynne Shotwell said in February that Starlink is expected to turn a profit this year. While Starlink's specific profit or loss is unknown, the WSJ previously reported that SpaceX overall "eke[d] out a small profit in the first three months of [2023] after two annual losses." SpaceX's Q1 2023 numbers reportedly included a $55 million profit on $1.5 billion in revenue.

The CNBC article had this, partially quoted in this ArsTechnica article,

The company last provided an update on its global Starlink user base in May, when it said it had about 1.5 million customers. Hofeller did not specify what that total is now but said Starlink is "well over" that 1.5 million mark. The figure includes both consumer and enterprise customers around the world ...