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ai6yr, to cycling

Took my recycling for a ride in the countryside! (Excess cardboard and a lot of broken plastic bins). #BikeTooter

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@ai6yr A while back; I biked a load of branches to the local compost pile in a trailer.

I thought this was unusual until someone else showed up with a trailer loaded with a very large empty compost bin and a shovel.

mekkaokereke, to random
@mekkaokereke@hachyderm.io avatar

4 years to the day after George Floyd was murdered, here's where we are:

  • Racist people are just as racist as the day before George Floyd was murdered.

  • Black people are still asking for the exact same things.

  • "Liberal" and "Centrist" white Americans are more racist, and less supportive of DEI than they were the day before George Floyd.

  • Police budgets have grown faster than they did the day before George Floyd.

  • Biden has undone any of the gains made during the protests.

1/N

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@bryan @mekkaokereke I have encountered a few people expressing nonsense like that since I moved back to Minnesota.

A group from the suburbs who wanted to pretend "Minneapolis burned to the ground" as a pretext for "support the cops" were particularly outrageous.

They would apparently rather deny the landscape in front of them than acknowledge ongoing racist violence by MPD (and by Saint Paul PD and other departments).

sundogplanets, to random
@sundogplanets@mastodon.social avatar

I am talking o a reporter about this in a couple hours: https://regina.ctvnews.ca/from-outer-space-sask-farmers-baffled-after-discovering-strange-wreckage-in-field-1.6880353

This is about an hour away from my farm, so this'll be a fun conversation, and yet another great opportunity to tell a lot of people about what a huge problem we have with unregulated commercialization of orbit. (Also I just redid my slides for my public talk next week, this is going in!)

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@WTL @sundogplanets By the time debris from spacecraft reaches the ground; it has cooled off from re-entry.

The risk from SpaceX's littering is meter-wide chunks of metal and carbon fiber coming down at terminal velocity.

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@EricFielding @WTL @sundogplanets At least the Crew Dragon trunk sections do not contain large tanks.

Let no one repeat what happened downrange from Xichang.

nyrath, to random
@nyrath@spacey.space avatar
michael_w_busch,
@michael_w_busch@mastodon.online avatar

@Benhm3 @nyrath We do have the variation where we make the orbiter very much more massive with a sack full of rocks.

The gravity tractor had not yet been invented at the time of Jay Melosh's 1994 review, thought.

firefly, to random
@firefly@m.ai6yr.org avatar
michael_w_busch,
@michael_w_busch@mastodon.online avatar

@firefly @ai6yr Attention @sundogplanets (Addendum: Naturally, she has already been notified.)

Perhaps also @sarahtaber , for the potential North Carolina connection. If this was spacecraft debris, there's farmland nearby that should be checked for more.

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@firefly @ai6yr @sundogplanets @sarahtaber We have identification from Jonathan McDowell ( @planet4589 ):

"This definitely looks consistent with being a bit of the Crew-7 Dragon's trunk which reentered on a path right over this location on Tuesday" - https://twitter.com/planet4589/status/1794047212332208453

Someone should check the fields along a line from west to north of Asheville.

And SpaceX really is littering a lot.

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@amyedge @sundogplanets @firefly @ai6yr @sarahtaber This was not a targeted re-entry: SpaceX just let the Crew Dragon trunk section fall out of the sky somewhere between Mississippi and Pennsylvania.

I note that the predicted ground track happened to pass very close to the Green Bank Telescope in West Virginia - although the spacecraft did not get that far.

(The prediction was over the line in Tennessee, but Asheville is close enough to be within the cross-track uncertainty).

michael_w_busch, to random
@michael_w_busch@mastodon.online avatar

Article: "This paper is about water management for human habitats on the Moon."

Me: Okay.

Article: Ignores things like the mixture of volatiles at the lunar poles; but spends a page insisting human lunar missions must be military.

Me: Nope.

And the arXiv does not need to host everything submitted to it...

michael_w_busch,
@michael_w_busch@mastodon.online avatar

If you should be interested in some actual discussion relevant to the possibility of using lunar water to supply human habitats:

Landis et al. 2022, "Spatial Distribution and Thermal Diversity of Surface Volatile Cold Traps at the Lunar Poles" - https://iopscience.iop.org/article/10.3847/PSJ/ac4585/meta

Discussing which lunar polar cold traps may have different amounts of things like mercury, hydrogen sulfide, and cyanide mixed in with the water.

(There might be some arsenic too.)

JohnBarentine, to til
@JohnBarentine@astrodon.social avatar

that fortunately someone has already invented a term that was on my mind but for which no word seemed to already exist.

Thank you, Urban Dictionary: https://www.urbandictionary.com/define.php?term=Spacewashing

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@dfrancis That is not what @JohnBarentine is talking about.

"spacewashing" is things like Lockheed Martin, Boeing, Raytheon, and SpaceX promoting their roles in supplying NASA missions while they make huge amounts of money out of weapons contracts.

e.g. Lockheed Martin alone makes several times NASA's entire budget from its DoD contracts.

johncarlosbaez, to random
@johncarlosbaez@mathstodon.xyz avatar

I want to read this book: A Darwinian Survival Guide. Sounds like a realistic view of what we need to do now. You can read an interview with one author, the biologist Daniel Brooks. A quote:

...

Daniel Brooks: What can we begin doing now that will increase the chances that those elements of technologically-dependent humanity will survive a general collapse, if that happens as a result of our unwillingness to begin to do anything effective with respect to climate change and human existence?

Peter Watts: So to be clear, you’re not talking about forestalling the collapse —

Daniel Brooks: No.

Peter Watts: — you’re talking about passing through that bottleneck and coming out the other side with some semblance of what we value intact.

Daniel Brooks: Yeah, that’s right. It is conceivable that if all of humanity suddenly decided to change its behavior, right now, we would emerge after 2050 with most everything intact, and we would be “OK.” We don’t think that’s realistic. It is a possibility, but we don’t think that’s a realistic possibility. We think that, in fact, most of humanity is committed to business as usual, and that’s what we’re really talking about: What can we begin doing now to try to shorten the period of time after the collapse, before we “recover”? In other words — and this is in analogy with Asimov’s Foundation trilogy — if we do nothing, there’s going to be a collapse and it’ll take 30,000 years for the galaxy to recover. But if we start doing things now, then it maybe only takes 1,000 years to recover. So using that analogy, what can some human beings start to do now that would shorten the period of time necessary to recover?

https://thereader.mitpress.mit.edu/the-collapse-is-coming-will-humanity-adapt/

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@johncarlosbaez I do not appreciate the parts of that interview where Daniel Brooks appears to treat the large majority of humans as disposable.

Quite possibly including himself: His imagined "prepper" small town would likely not be able to provide the appendectomy he once needed.

(Peter Watts does make a relevant point there; regarding Brooks' book being co-opted.)

One can work for the needed immediate systemic changes to maintain vital infrastructure without suggesting abandoning people.

ai6yr, to random
michael_w_busch,
@michael_w_busch@mastodon.online avatar

@evilotto @ai6yr I submit that going "no true Christian" or pointing out the contradictions between Samuel Alito's claimed beliefs and his actions is not that helpful.

Authoritarians do not care about hypocrisy.

Similarly; there is a contingent of American atheists who are willing to work with Christian nationalists because they value being able to engage in racist, sexist & otherwise bigoted forms of social control than they value having a secular government.

setiinstitute, to space
@setiinstitute@mastodon.social avatar

: This stunning photo was taken by the High Resolution Stereo Camera (HRSC) onboard the ESA's Mars Express spacecraft. Phobos is the larger and closer of Mars's two moons, the other being Deimos. One hypothesis of their origin involves the possible capture of primitive asteroids. Unfortunately, Phobos is being pulled apart and closer by Mars's tidal forces and gravity. Credit: ESA/DLR/FUBerlin/ @andrealuck CC BY (https://www.flickr.com/photos/192271236@N03/53635851891/)

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@Nic @setiinstitute It is not true-color, but that is a real image from the Mars Express spacecraft.

There is an artifact from how it was taken: The spacecraft was tracking Phobos, so Mars appears with a wobbly blur to it.

18+ ai6yr, (edited ) to random

movie review: Star Wars Rogue One: how to film a movie and ensure you don't accidentally create a new star or any uppity actor/actress demands, by making sure to kill every single one of them them all off by the end of the movie. (Update: apparently they re-used the characters in a prequel TV series called Andor, LOL... haven't seen that many characters slaughtered in a movie ever)

18+ michael_w_busch,
@michael_w_busch@mastodon.online avatar

@ai6yr There is the entire "Andor" series, though?

CelloMomOnCars, to solar
@CelloMomOnCars@mastodon.social avatar

Smelting Without Fossil Fuels: Power Shatters the 1,000°C Barrier for Industrial Heating

"Swiss researchers have developed a solar energy method using synthetic quartz to achieve temperatures above 1,000°C for industrial processes, potentially replacing fossil fuels in the production of materials like steel and cement."

https://scitechdaily.com/smelting-steel-without-fossil-fuels-solar-power-shatters-the-1000c-barrier-for-industrial-heating/

Caveat: this is a lab result, albeit a promising one.

michael_w_busch,
@michael_w_busch@mastodon.online avatar

@CelloMomOnCars @ai6yr It is not obvious to me that this solar thermal furnace is either useful or necessary for decarbonizing steel production.

A large fraction of steel smelting is already done in electric arc furnaces; which can be powered by any non-fossil-fuel generator, albeit at potentially lower efficiency?

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