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- Sat, 27 Jun 2020 00:38:22 EST zrmSOSRH No.58098
File: 1593232702187.png -(46369B / 45.28KB, 192x187) Thumbnail displayed, click image for full size. THE UNIVERSE
What if our known universe is a hole cut in the sheet being stretched by the class so the professor can demonstrate gravity how a marble will eventually orbit the hole?

If our universe is the hole cut in the sheet, what is it that exists outside the expanding universe?

Candy Rockets!

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- Sun, 29 Mar 2020 00:56:38 EST n+7z5RVF No.58034
File: 1585457798883.jpg -(11322B / 11.06KB, 138x365) Thumbnail displayed, click image for full size. Candy Rockets!
I just bought some KNO3 (stump remover) at the hardware store today and will be making my first attempt at DIY rockets in the very near future. I'll be starting with the standard 65/35 ratio and then working in other additives to fine tune. I'm using Spectricide brand KNO3 and cheap, grocery store table sugar purchased at Walmart. I'll be doing the cooking in a motel room that my employer rents for me when I travel, because if I blow myself up it'll be way more entertaining to do it in a motel. I plan on using heavy cardboard tubes (scrap material from work) for motor casings plugged on the ends with bentonite clay (kitty litter).

I'll post pics of my work as I go along assuming my IP doesn't get highjacked and give updates on mixes and results. If you are already doing this, chime in, post pics and rock(et) on!
7 posts and 1 images omitted. Click View Thread to read.
Antony Hewish - Thu, 11 Jun 2020 20:44:45 EST lgt2I6fP No.58091 Reply
THATS FOR REMOVING TREE STUMPS i might have to call someone i'm a bitch and you might hurt somebody
Joseph-Louis Lagrange - Sun, 14 Jun 2020 22:47:55 EST wnBZ7ko+ No.58093 Reply
Did a full test of two grains today, with mixed results. The first grain - the smaller of the two - went off as expected but since my casings had no nozzles and were made of PVC, it was pretty unspectacular. The second, larger grain only burned about halfway, which was disappointing. I even tried burning the remainder from the other end and it still wouldn't completely burn, so I fucked something up. My guess is residual water left over from the manufacturing process.

On the plus side, my fuses (potassium permanganate/sulfur/silicone) worked great. They're not nearly as flexible as the YouTube video claimed they'd be, but they burn nice and slow and steady. I'd like to make some electronic matches but I don't have any potassium perchlorate and that shit is crazy expensive to buy. I'm pretty sure I can make some but that's probably a month-long process between setting up the equipment and then doing the synthesis. I'm going to try with KNO3 first and see if it works but KNO3 might be too unstable and there's a chance I could blow myself up.

As for the next batch of r-candy, I have some sorbitol now so I'm going to try dry mix again, since sorbitol's melting point is much lower than it's ignition point. Plus, if the YouTube video is to be believed, it's much easier to cast into grains. This time I'll be including a plug and nozzle to help build pressure. And finally, I'm not really impressed with sulfur as a burn rate enhancer so I'm going to get some iron oxide and try that.
George Airy - Thu, 02 Jul 2020 18:03:55 EST lgt2I6fP No.58101 Reply
Why not buy some rocket fuel from the hobby store? Tragedy how everyone ruins a thing like civilian rocketry by being mediocre. We could have been so smart, me and you OP.

SpaceX Demo-2

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- Mon, 25 May 2020 14:55:01 EST OIxQBpbG No.58076
File: 1590432901481.jpg -(407622B / 398.07KB, 1365x2048) Thumbnail displayed, click image for full size. SpaceX Demo-2
First launch of crewed US spacecraft since 2011 scheduled for Wed 27th, 4:33 p.m. ET, contingent on weather conditions. Space Shuttle veterans Robert Behnken and Douglas Hurley will pilot the spacecraft to the ISS.

Pictured: CrewDragon atop Falcon 9 at Launch Complex 39A, Kennedy Space Center, Florida, being readied for launch.
3 posts omitted. Click View Thread to read.
birn - Sun, 14 Jun 2020 17:55:05 EST HeCUPa43 No.58092 Reply
you work at vector? these little dogs flying themselves into space.
Friedrich Bessel - Mon, 15 Jun 2020 12:54:18 EST qrVaTXg3 No.58094 Reply
Lockheed and Martin have vectors and matrices divisions
elon musk - Mon, 22 Jun 2020 18:00:21 EST qrVaTXg3 No.58097 Reply
thank you for success on falcon codex

Planet Nine

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- Wed, 20 Jan 2016 21:32:30 EST bnm9ITDo No.55945
File: 1453343550884.jpg -(29930B / 29.23KB, 700x394) Thumbnail displayed, click image for full size. Planet Nine
Scientists have found evidence for a new, ninth planet in our solar system with a mass around ten times that of Earth. Get hype.

15 posts and 2 images omitted. Click View Thread to read.
Thomas Henderson - Thu, 18 Jun 2020 18:44:11 EST h9JUkhhl No.58095 Reply
how is this 4 years old and on the front page? we ever find any thing out yet?

Type 2 & 3 Civilizations

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- Tue, 12 Nov 2019 21:04:20 EST gskNGeFw No.57852
File: 1573610660903.jpg -(70405B / 68.75KB, 728x410) Thumbnail displayed, click image for full size. Type 2 & 3 Civilizations
I've been pondering on embroaching my skilltelect at writing passable sci-fiction into a book that dwelges the line between a, let's say type 2 civilization and a type 3 civilization. I was thinking having maybe a the type 2'ers at much better than the civ 3 people at like a noteworthy skill or aspect, but the level 3'ers of course being so, so much more far advanced, what with having the entire planet system harvested, when so surely the 2'ers only control one star.
Please strike me up on this what could be an ever fading dividing line there.
6 posts and 2 images omitted. Click View Thread to read.
Riccardo Giacconi - Mon, 13 Apr 2020 13:05:41 EST Y5FPmIuT No.58046 Reply
What the fuck are you trying to say
Stick to making shitty pipes dude
Edwin Hubble - Tue, 09 Jun 2020 07:25:32 EST lgt2I6fP No.58088 Reply
1591701932403.jpg -(131584B / 128.50KB, 590x332) Thumbnail displayed, click image for full size.
a nuclear pellet burning reactor would be the most feasible extremely high-impulse fuel initiative as something that can be completed using a barge with huge pallets of cash as a 10-20 year research initiative, successful small scale mockup tests have been completed, "the more you know."

current initiatives lean toward resurrecting a 1950's program that was shut down by proliferation treaties and obsolescence-- small scale fission reactors being built on ramjet engines released into a glide from a launch rocket, next gen elderly babby's first firststrike program: how embarassing!

lifespan reached, directive received: going away now, goodbye cruel world
teslastock - Tue, 09 Jun 2020 18:07:25 EST X5wvlBRg No.58089 Reply
if advanced civilization could travel through universe membrane while contorting dimensions and either in 4-D space or 11 spatial springs resonances; if said alien life could pass on a virus how would they start?

Frightening sound of space and at the same time soothing

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- Fri, 10 Jan 2020 13:23:33 EST 70mxgl7D No.57955
File: 1578680613397.jpg -(73279B / 71.56KB, 500x333) Thumbnail displayed, click image for full size. Frightening sound of space and at the same time soothing
With what program did he create this sound?
3 posts omitted. Click View Thread to read.
birn - Wed, 03 Jun 2020 01:04:33 EST HeCUPa43 No.58084 Reply
1591160673635.jpg -(297030B / 290.07KB, 1680x1050) Thumbnail displayed, click image for full size.
it's called visting your old people. its aslo a type of terrable void like reading the firebird book. like an alien touching you. trying to make an exotic. just-in case put your old people away in a place they cannot be a nuesance. harmless
Bernhard Schmidt - Thu, 04 Jun 2020 17:57:43 EST X5wvlBRg No.58085 Reply
isnt there no sound in the vaccum of space????

fractals are the way secrets of the universe ?

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- Sat, 29 Jun 2019 13:14:33 EST AO8Gahk0 No.57752
File: 1561828473859.jpg -(555646B / 542.62KB, 1899x1105) Thumbnail displayed, click image for full size. fractals are the way  secrets  of the universe ?
fractals are the way secrets of the universe ?


3 posts omitted. Click View Thread to read.
Anders Angstrom - Sun, 08 Mar 2020 00:52:02 EST f2ZZbPdY No.58012 Reply
I'm sure it's the programming code of the universe
justin bryant - Sun, 24 May 2020 16:25:55 EST HeCUPa43 No.58075 Reply
kolidascrocpes are not the showing of the univerise im pretty sure your able to see thatt once in yoyr life.

What is the point of Star Trek Picard???

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- Mon, 17 Feb 2020 02:17:34 EST aVozUNfZ No.57977
File: 1581923854545.png -(313044B / 305.71KB, 783x669) Thumbnail displayed, click image for full size. What is the point of Star Trek Picard???
I mean both in universe and out of universe?

just watched the 4 episodes and It's like ok robots are bad the federation is and picard is old and wants to go on an adventure, romulans are bad and broken and its all just like what is all this in service of???

like even if it ends with "jeez we stopped the plot and blew up the fake borg cube" then what was the point? just nothing has any impact on anything
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
FEMA ALERT!!! 🚨🚨🚨🚨🚨
7 posts omitted. Click View Thread to read.
Friedrich Bessel - Wed, 20 May 2020 16:54:47 EST pNbTjc9M No.58071 Reply
Just make Alex Jones the head of FEMA. Whatever happens, it will be amusing.
Joseph Lockyer - Wed, 20 May 2020 17:09:28 EST EZOyjhDZ No.58072 Reply
Don't jinx it the clown might actually do it by the end of his 2nd term.
William de Sitter - Thu, 21 May 2020 23:59:19 EST pNbTjc9M No.58073 Reply
Fuck you, it would be incredible. Alex Jones for permanent position as head of FEMA! Do it now! Best timeline ever!
>imagine it...
imagine it... I bet first thing jones does is order a bunch of water filters and bodybags, the true essentials for FEMA.

Dark Matter

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- Fri, 17 Jan 2020 23:41:50 EST Q2er1WFU No.57963
File: 1579322510429.gif -(5253041B / 5.01MB, 600x300) Thumbnail displayed, click image for full size. Dark Matter
This is probably pretty dumb or has already been proposed but what if large masses move space along with them?
I've had the idea after stirring my coffee, noticing that if you didn't know about the coffee you'd wonder why the cream won't stop rotating.
11 posts and 2 images omitted. Click View Thread to read.
Edward Pickering - Thu, 14 May 2020 21:13:32 EST R+NnEwcz No.58065 Reply
I wanted to say something negative about your post, but my tolerance is gone apparently and I think you are probably right here... though I suspect that whatever the greater topic is, you are likely wrong. Though, the point of science is to always get praised when you find out you are wrong, before someone else finds that out first.
Edward Pickering - Thu, 14 May 2020 21:14:37 EST R+NnEwcz No.58066 Reply
Dark matter is just a numerical placeholder to keep models working for unrelated tasks.
Henrietta Levitt - Fri, 29 May 2020 12:46:30 EST X5wvlBRg No.58080 Reply
i have better matter promise. extra dimensions are real pockets deep


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- Mon, 23 Mar 2020 19:03:30 EST zhzC7ZYp No.58017
File: 1585004610644.png -(2842084B / 2.71MB, 1366x1154) Thumbnail displayed, click image for full size. Astrophotography
How many of you do astrophotography? Anyone down to share photos and discuss setups? Any outsiders to the hobby interested and have questions? Git on in here.

Pic related, my most recent, and probably best shot of a galaxy- NGC2903. Taken on a Canon T6i through a 6" f/5 Newt on a Meade LX85 mount @ ISO 1600, 61x32sec exposures + 142 bias frames, 23 dark frames, 91 flat frames. Processed in DeepSkyStacker, PixInsight, and RawTherapee.
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Molniya - Wed, 13 May 2020 11:55:09 EST ZuMF7RSe No.58064 Reply
1589385309943.png -(533432B / 520.93KB, 336x264) Thumbnail displayed, click image for full size.
ISS with the japanese HTV-7 next to it. Took it ~2 years ago with a 60mm refractor and a phone

Floating colonies on Venus

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- Sun, 06 Dec 2015 16:45:02 EST vB+y87GU No.55850
File: 1449438302494.jpg -(34599B / 33.79KB, 556x334) Thumbnail displayed, click image for full size. Floating colonies on Venus
What does /sagan/ think of this?
I think it's a pretty fucking sweet idea. I wonder what sort of materials you could use that are both light weight and durable enough for a floating Venusian colony. I had an idea that could help with the buoyancy of the thing: non essential parts of the structure (floors and walls) could be made out of brick like objects that are either vacuum hollow or filled with a gas like helium at very low pressure. They would be brick like objects because many could be punctured without jepordizing the integrity of the station. one could also vent waste heat out the bottom and sides to create a bit of thrust.
The only major problem would be in getting people and materials to and from the colony. Then again, I suspect by the time we're in a position to build something like this, navigating the haze of the Venusian atmosphere safely won't be much of a challenge.
16 posts and 1 images omitted. Click View Thread to read.
Robert Dicke - Tue, 08 Dec 2015 18:00:55 EST vB+y87GU No.55873 Reply
>The asteroid belt is where its at.
Well obviously colonization of Mars and Venus and the construction of space habitats would take place within the context of a well established and rapidly expanding space economy. I don't have to tell you that there is an incredible abundance of resources between Mercury and suburban Jupiter. In the midst of taking advantage of this tremendous windfall, it only makes sense to put habitable places where we can. If for no other reason than as a way station and a refuge. (think a stop for fuel or something at a space station orbiting Venus on your way from Earth to Mercury or something)

>I wouldn't want to go to Venus, there isn't anything there. You can't land on the surface, no moons, no nothing, bbbbooring
The most brutal hellscape in the solar system is boring to you? I don't want to insult you or anything, but whaaa? I don't know how any place in our solar system could be considered boring (well, aside from the MASSIVE expanses of literally nothing, but that goes without saying)
>you can't land on the surface
With currently existing caveman tech it's not a very good idea.

>Given our lives now, i know in 300 years there will be a miserable dick job of 'asteroid miner'. So you didn't go to college and you are a physically capable young person, get your ass to space and go get some stuff.
Frankly neither of us can imagine what human societies will look like in three centuries. If neo-liberal capitalism is still the default system, I'm not sure we'll even be around in three hundred years. Anyway, asteroid mining will likely be almost entirely automated. It makes more sense to have a bunch of durable, easy to produce machines hacking up rocks in space, not a bunch of frail bloodsacks who can't function in an irradiated, freezing, vacuum.

> I like realistic sci-fi
Me too. I love Star Wars, but the lore of franchises like Star Trek and Mass Effect is so much more interesting BECAUSE so much of it is plausible.

>In your universe, I want magic powers like the force and shit.
I'm not operating within a magic universe. I'm talking about something that will become achievable within the context of a future space based economy. I see the point in your criticisms. There isn't a direct need for a Venusian colony when you could just have a few ring habitats orbiting the planet. Still, a floating colony could be useful for tourism and scientific research. And when you've got a massive economy and advanced technology, it's inevitable that some people will think "hey, lets do thing."

Brah, the sun isn't a rare earth metal.
Johann Encke - Wed, 22 Apr 2020 13:03:01 EST iJcoyZ+q No.58053 Reply
it could work but the gasses on Venus are toxic so you can't breathe it

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