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Mark Graybill Profile
Mark Graybill

@saundby

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Rocket guy, now cheering from the sidelines. President of The Villages Astronomy Club, with a mission to get closet telescopes out under the sky.

The Villages, Florida
Joined July 2008
Don't wanna be here? Send us removal request.
@saundby
Mark Graybill
3 days
Happy International Cat Day!
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@visualscat
Black cats are not bad luck
3 days
happy international cat day!🐾🐈‍⬛
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@saundby
Mark Graybill
3 days
RT @888goody: うちのみろく&ターラとは、こちらの譲渡会で出逢いました✨.うちの子達は1歳半の成猫でお迎えしましたが、すっかり慣れてくれて可愛いですよ~ 子猫も成猫もそれぞれの良さが有り、結局どちらも可愛い🥰💕.九州在住で猫のお迎えを考え中の方に、オススメします と….
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@grok
Grok
18 hours
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@saundby
Mark Graybill
3 days
And what state was Ariane 6 in when its first payloads were manifested on Feb 10, 2022?. It didn't even have a completed launch site yet.
@DutchSpace
DutchSpace
3 days
Interesting. (Although, I was not aware that doing 9 Starship IFT's with variable success equates to being able to sell "Starship services to Mars" as if it's available today, curious which timeline this agreement has and if this is for a cargo only flight or with crew. )
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@saundby
Mark Graybill
3 days
A substantial peev about @X's interface:. I use it landscape on a 12.2" tablet, the interface runs off the bottom of the screen when I'm posting. I have to unlock rotation, turn my 12 inch tablet vertical like it's a damn phone, just to get access to the Post button. Scrolling
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@saundby
Mark Graybill
3 days
But we've already got 8080 at home.
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@RadioJunkBox
RJB
3 days
8080day…
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@saundby
Mark Graybill
4 days
"Comparison of Solar Photovoltaic and Nuclear Reactor Power Systems for a Human-Tended Lunar Observatory".
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@saundby
Mark Graybill
4 days
And in 1987, we were talking =real= power, and real commitment:. Multimegawatt Nuclear Power System for Lunar Base Applications.
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@saundby
Mark Graybill
4 days
Going back to 1992:.An evolution strategy for lunar nuclear surface power. Nuclear systems offer the best opportunity for evolution in terms of both life and performance.
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@saundby
Mark Graybill
4 days
For anyone wanting some background on NASA thinking about lunar nuclear power plants:."A nuclear fission reactor powered system should be seriously considered as the first large (order of 50 kWe or greater) power system to be placed on a lunar base. ".
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@saundby
Mark Graybill
5 days
100KW is a bit more than the ISS produces at peak with its solar arrays. For ISS, solar is fine. It has plenty of sun & its operations don't take much power compared to surface operations. It takes more to drive rovers, extract materials, and not freeze through lunar night.
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@saundby
Mark Graybill
5 days
Hearing the idea of putting a 100KW reactor on the Moon is the first sign of seriousness toward lunar exploration that I've seen in the U.S. The timeline is too long, and the power output is too low, but it is still promising. Lunar bases need nuclear power to work for real.
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@saundby
Mark Graybill
7 days
This crime demands criminal charges & trial:. 156匹を餓死させた犯人を許すな!厳罰起訴と実刑判決を求めます! - Sign the Petition! via @Change.
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change.org
156匹を餓死させた犯人を許すな!厳罰起訴と実刑判決を求めます!
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@saundby
Mark Graybill
8 days
RT @MichaelARothman: "Insanity in individuals is rare - but in groups, parties, nations, and epochs, it is the rule." -Friedrich Nietzsche….
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@saundby
Mark Graybill
12 days
Kelly's Heroes.2001: A Space Odyssey.Pitch Black.The Thin Man.Warcraft. And a few hundred others. .
@DaddyWarpig
Daddy Warpig
12 days
Star Wars.Wrath of Khan.The Lost Boys.Raiders of the Lost Ark.Goonies. There are others.
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@saundby
Mark Graybill
13 days
If you're interested in the origins of role playing games, give this Kickstarter a look-see:.
@thecriticaldom
Dominic Martyne
13 days
We're almost to the last 48 hours! Can we break 100 backers?.
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@saundby
Mark Graybill
15 days
RT @BasedMikeLee: Unless the Senate decides to #ClearThe135 now, we may never catch up. That would further empower the Deep State™️. This i….
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@saundby
Mark Graybill
15 days
RT @TheCalvinCooli1: 🚨Report: A Dutch lawyer who was going to lead a major lawsuit against Bill Gates, Pfizer CEO Albert Bourla, and WEF Ch….
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@saundby
Mark Graybill
15 days
Gee, what do you know?.And if you want a cold drink from a shop in Europe, the only time to get one cold is first thing in the morning after the shop's been closed for hours. First time you open the cooler door, that compressor is going to be thumping away for the rest of the day.
@2againsttyranny
Sack Head Shaun
21 days
@HLC_actual Ok, I did some research because I wasn't going to sleep tonight if I didn't, this triggered the 'tism. I wanted to know the ratio, adjusted for population variances of heat deaths to gun deaths between the Europe and the US:. 🔥 FACT CHECK: You're 3.6 times more likely to die
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@saundby
Mark Graybill
15 days
RT @GuntherEagleman: 🚨 OFFICIAL POLL:. Should @SpeakerJohnson and @LeaderJohnThune WORK through the “August recess” as Trump requested? . R….
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@saundby
Mark Graybill
18 days
I paid for this film. Totally worth it. Amazing insights from the creators of RPGs. Now it's free. No excuses not to see it if you're an RPG player & would like a look into how things turned out as they did, and alternatives.
@Blackmoor_Film
The Fellowship of the Thing - Official Blackmoor
18 days
I recall speaking to gamer friends about the film as we were making it. They were all saying: Oh man, gamers are gonna be all over this. My prediction at the time: Nope, it will be a sleeper. Yup, we made the documentary about Dungeons & Dragons origins. All I can do is post
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