Starred posts

Jan 16 23:02

uhoh

Dec 31, 2024 11:00

Ars Technica's After 60 years of spaceflight patches, here are some of our favorites; It turns out the US spy satellite agency is the best of the best at patch design. has some "scary" ones :-)

geoffc

Jun 6, 2024 14:18

@fyrepenguin When AWST does its next aerospace awards, they need to create one to give to the flap. :) HOly smokes.

3

rumtscho

Sep 10, 2024 16:40

@uhoh oh wow, the video on the second question, that was mesmerizing!

Erin Anne

Aug 22, 2024 22:46

> The results of a preliminary investigation into what caused an RFA ONE first stage to burst into flames have identified an oxygen fire in one of the turbopumps as the culprit.

XKCD

Aug 21, 2024 17:31

Personally I think mercury is more of a 'wet earth' hybrid element.

TheMatrix Equation-balance

Jul 11, 2024 21:29

@geoffc - With Elon's ambitions, I would not be surprised if he one day moves aggressively into advanced military manufacturing.

fyrepenguin

Feb 24, 2024 02:52

@uhoh time to make a lunar wind farm startup, do an IPO, then run off with the cash

2

Erin Anne

Jun 20, 2024 17:03

I bet there's also some politicking from the astronaut office. "What do you mean you'd leave seats empty on a spaceflight that isn't a test flight?" Something like that.

Erin Anne

Jun 19, 2024 17:10

physics.aps.org/articles/v17/97

Erin Anne

Jan 22, 2024 02:20

@uhoh on the "why didn't they think of that", one of my favorite examples is the Morpheus lander, though it's arguably more obscure than "why didn't they think about the basic torque issues here"

2

Erin Anne

Jan 19, 2024 20:03

CLAP CLAP CLAP CLAP
DEEP IN THE HEART OF TEXAS

2

Erin Anne

Jun 1, 2024 08:15

after like a decade of CCDev I just...Starliner is so sad. Dragon 2's been a media darling and a damn fine vehicle and Starliner is just...sad

fyrepenguin

Jun 1, 2024 07:43

@uhoh hoping that all goes well, but it’s never a good feeling when there’s known issues on human payload missions

Erin Anne

Jun 1, 2024 06:14

@uhoh so I think best case that's an average velocity of around 5.1 km/s. Assume it ramps up and then down linearly and the peak speed is 10.2 km/s at 300 seconds in. 10200 m/s / 300 s = 34 m/s^2, ore more than 3G. Continuously. Eyes in then eyes-out.

Erin Anne

Nov 23, 2023 21:29

"COOL! The spicy article I wrote about satellite pollution is FINALLY published! "Bright satellites are disrupting astronomy research worldwide" in Nature News & Views.

This article required weeks of back-and-forth with the editor, the editor-in-chief, and Nature's lawyers, so I hope that means it's a good one.

During this process, I learned that satellite companies are so powerful and litigious that even giant publishers like Nature are terrified of getting sued. Which is...rather worrying." https://mastodon.social/@sundogplanets/111460537888232133

2

Erin Anne

May 9, 2024 23:56

I don't know what it'd take to get a Space Exploration community going there; I've barely looked at it at all, admittedly. I'm just looking at alternatives, because it seems like the only way not to enrich OpenAI (who I don't like very much for several reasons) is to stop contributing here

Erin Anne

May 9, 2024 23:55

anybody else kind of feel like jumping ship and going to codidact? I haven't tried it yet; I assume, like with the move to Mastodon/the Fediverse over Twitter and Lemmy et al from Reddit, it's one of those things that needs a critical number of people to be worthwhile

Erin Anne

Apr 22, 2024 19:24

wow. Remote retrocomputer support has to be the worst

Erin Anne

Apr 11, 2024 05:53

@uhoh it sounds like the astronomers know and the filmmakers don't

Erin Anne

Feb 23, 2024 05:03

> After troubleshooting communications, flight controllers have confirmed Odysseus is upright and starting to send data.
> Right now, we are working to downlink the first images from the lunar surface.

Erin Anne

Jul 20, 2023 09:53

lol, I got a good laugh out of "deuterium 3"

2

uhoh

Feb 1, 2024 06:06

I don't want to debate geopolitics and the "art of war". I'll only comment on the wistful blogpost and its premises. Give it a good read, and ping me only if you want to talk about that specific article. Don't lecture me on something unrelated.

Rory Alsop

Jan 10, 2024 20:17

@uhoh definitely reassuring that it's a false alarm, but still not great to have alarms like that!

Erin Anne

Jan 9, 2024 23:29

@geoffc to hell with recon, it's an eVTOL. It'll be bigger than Ingenuity so likely less flexible in where it can land, but still be able to go and see things up-close all over if it's instrumented to do so

Erin Anne

May 5, 2023 22:37

I need to stop participating in this before I injure myself from rolling my eyes

2

fyrepenguin

Apr 26, 2023 04:17

In general though I don’t think you can make many inferences about the final vehicle performance based on a test launch with numerous failed and damaged engines

2

geoffc

Apr 25, 2023 14:56

@TheMatrixEquation-balance Avoid destroying the pad. Almost certainly that was the biggest reaosn.

2

PearsonArtPhoto

Apr 25, 2023 13:59

It's the easiest thing in the world to run simulations if one has the proper data, I can pretty much guarantee that SpaceX has run thousands of simulations in software and hundreds using near-flight hardware (Electronic) of various test scenarios.

2

TheMatrix Equation-balance

Dec 27, 2023 01:44

This is something new for NASA: "OSIRIS-REx had a quarter of its fuel left. The team proposed to dispatch it on a bonus mission to asteroid Apophis." phys.org/news/…

Erin Anne

Apr 20, 2023 14:54

check out this LabPadre remote cam. Apparently 1100ft from pad, which (on reflection) is too close twitter.com/LabPadre/status/1649053476276797440?s=20

2

Erin Anne

Dec 9, 2023 07:23

I don't 100% agree with his conclusions, but he's a smart cookie

Rory Alsop

Dec 4, 2023 10:12

@uhoh wow - that's bad

Erin Anne

Nov 23, 2023 04:33

@uhoh you're much more familiar with the Astronomy StackExchange than I am. Is a question about this on topic there? "However, the view of most astronomers is that Swift was simply employing a common argument of the time, that as the inner planets Venus and Mercury had no satellites, Earth had one and Jupiter had four (known at the time), that Mars by analogy must have two. Furthermore, as they had not yet been discovered, it was reasoned that they must be small and close to Mars."

geoffc

Nov 15, 2023 23:18

Launch License acquired!!!! Friday 8-10AM EST launch window. Screw work I guess.

Organic Marble

Feb 8, 2022 22:48

@geoffc I have seen 3 shuttle launches (2 daylight, 1 night) and 1 Atlas launch (New Horizons). I attempted to see 1 other shuttle launch but it got delayed so much I had to give up.

3

Erin Anne

Aug 20, 2023 00:21

@uhoh interesting question. I've also wondered whether or not directed radar pulses are underrepresented in military arenas. Like, if you have an AWACS aircraft (a big aerial radar) getting engaged with a radar-guided missile, I wouldn't be at all surprised if a combination of sensors could get a VERY powerful beam pointed back at the missile seeker and render it totally blind. I wonder what kind of arms race there's been in the engineering there

PearsonArtPhoto

Aug 9, 2023 21:32

0

Q: 10th anniversary of Space.SE!

It turns out we, The Final Frontier, https://thefinalfrontier.stackexchange.com , more commonly known as the Space Exploration Stack Exchange, are turning 10 years old! September 13th we will hit that huge milestone! While we are hitting this milestone, let's take a bit of time to think about som...

discussion

Erin Anne

Aug 8, 2023 06:45

@uhoh looks like it's here prnewswire.com/news-releases/… and other (25cm?) images are at umbra-open-data-catalog.s3-website.us-west-2.amazonaws.com/…

Erin Anne

Aug 8, 2023 03:14

regulation: the reason we can't have nice things*

TheMatrix Equation-balance

Jul 18, 2023 21:55

@uhoh - The mortar launcher set up by Apollo 16 astronauts in 1972. The launcher is in the foreground an other experiments can be seen in the background. (NASA). A mortar was brought to the Moon by both Apollo 14 and 16 to fire rocket-propelled grenades over a kilometers from a seismic station set up by the astronauts. Three of these mortars that ranged between 775-1024 g explosives were launched during the Apollo 16 mission.

geoffc

Jul 11, 2023 14:31

@uhoh I was there in November 2001 and it was very somber walking down to the site, to see what could be seen. I made it to the Observation Deck in the late 90's. Yet to try the new one.... I missed the opening stair climb event though. Would like to get back in shape and do that.

Erin Anne

Jun 23, 2023 18:22

Maybe relevant to somebody else: there's been an effort to open-source an integrator that's matches JPL Horizons. It's called ASSIST github.com/matthewholman/assist and is based on REBOUND rebound.readthedocs.io/en/latest per mastodon.social/@sundogplanets/110594875934148383

Erin Anne

Jun 7, 2023 23:32

and judging by the pattern, it's an excuse to fight about the idea with people. It's trolling.

Rory Alsop

Jun 7, 2023 22:21

@TheMatrixEquation-balance For many of your questions there is no understanding because what you wrote is not based on reality. Many folks have suggested fully reading and learning a space-101 course before writing some of your posts, as you would realise that they should never have been posted

Erin Anne

Jun 7, 2023 04:28

I don't know what course you need to listen to the people you interact with instead of deciding your idea is awesome and people just don't get what you're saying

Erin Anne

Jun 7, 2023 04:27

start with taking a physics 101 course so you know that mass doesn't offset acceleration

Erin Anne

Jun 7, 2023 04:26

but just to expound on their general theme: start writing questions that don't deserve to be closed, and I won't vote to close them

Erin Anne

Jun 7, 2023 04:23

Why don't I leave notes anymore? Because when you get feedback on your questions, you argue with the people who leave feedback

Erin Anne

Jun 7, 2023 04:22

why? Because the title question "What should be the mass of spacecraft going through Earth gravity assist maneuver to compensate for the 30 tons recoil force?" doesn't make any sense, and the body doesn't actually expand on the title question

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