/sci/ - Science & Math

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/sfg/ Space Flight General

Anonymous Sat 17 Apr 04:59:38 2021 No.12988349 View Reply Last 50 Original Report

Quoted By:

THE ETERNAL BTFO, HIGH GRADE COPIUM EDITION

Old thread >>12985158
Also a Soyuz touched down

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Anonymous

Anonymous Sat 17 Apr 2021 18:06:54 No.12990642 Report

Quoted By:

>>12990635
https://www.nasa.gov/feature/boldly-go-nasa-s-new-space-toilet-offers-more-comfort-improved-efficiency-for-deep-space/

Anonymous

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Anonymous Sat 17 Apr 2021 18:08:19 No.12990648 Report

Quoted By:

>>12990633
>wake up
>take phone
>open /sci/
>search /sfg/
>it wasnt a dream

Anonymous

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Anonymous Sat 17 Apr 2021 18:09:04 No.12990651 Report

Quoted By:

>>12990633
We are all going to make it bro!

Anonymous

Anonymous Sat 17 Apr 2021 18:11:21 No.12990659 Report

Quoted By:

>>12990641
Sierra Nevada was the engine supplier for Dynetics, I think.

Anonymous

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Anonymous Sat 17 Apr 2021 18:13:03 No.12990666 Report

Quoted By:

LEGEND

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Rigorous or simplified text for a first exposure?

Anonymous Sat 17 Apr 18:11:21 2021 No.12990658 View Reply Original Report

Quoted By: >>12990665

An example being deciding between reading Stewart's or Spivak, or reading Stewart's and then reading Spivak

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Anonymous Sat 17 Apr 18:02:57 2021 No.12990626 View Reply Original Report

Quoted By: >>12990661 >>12990664

how come they do nothing with their lives if they are so smart?

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Flaws in the race theory

Anonymous Sat 17 Apr 13:50:32 2021 No.12989743 View Reply Original Report

Quoted By:

If the race theory doesn't fit half of the world's population (the new world isn't depicted but most of it is mixed race), is it real?
You can't just push a theory that doesn't fit half of the people that are alive.
How can you say that races exist when Indians and arabs (2.5 billion people) don't have a race to belong to?

14 posts omitted

Anonymous

Anonymous Sat 17 Apr 2021 18:03:01 No.12990627 Report

Quoted By: >>12990653 >>12990656

>>12990617
When I search for Caucasoid, every source points out that it is outdated or otherwise unsuitable for general use. Why is that?

Anonymous

Anonymous Sat 17 Apr 2021 18:08:26 No.12990649 Report

Quoted By:

>>12990598
It sounds Latin and is therefore a good word.

>>12990617
That would be a start if it had any meaning more specific than white. It may even be worse but "whites" isn't in the 3-race theory so you can't use the theory then propose whites are something smaller in it.

Anonymous

Anonymous Sat 17 Apr 2021 18:09:14 No.12990653 Report

Quoted By:

>>12990627
It uses population clustering, which consensus science defines as invalid to be used on humans.

You can apply cluster analysis successfully to humans, and this does result in the normally defined races: negroid, caucasoid, mongoloid, australoid and melanesians. However, scientists disagree with this on moral grounds, so it's not a mainstream view.

Anonymous

Anonymous Sat 17 Apr 2021 18:10:09 No.12990656 Report

Quoted By:

>>12990627
The term 'West Eurasian' is the more up to date term. It's fairly commonplace in modern fields of science like Archeogenetics.
White, on the other hand, was a term of constantly shifting definition chiefly used in determining which ethnic groups were entitled to which rights, which is more humanities/law and less science.

Anonymous

Anonymous Sat 17 Apr 2021 18:12:19 No.12990663 Report

Quoted By:

I feel sorry for people that peruse this field. Like, you could study anything you liked in this world from music history to atomic physics, but instead you picked racial "science"

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Anonymous Fri 16 Apr 00:07:16 2021 No.12981299 View Reply Last 50 Original Report

Quoted By: >>12990422

I don't understand how this thing isn't going to kill all of us.

It mutates so fast and each mutation is deadlier and more transmissible and then also it evades existing antibodies.

Are we pretty much fucked?

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Anonymous

Anonymous Sat 17 Apr 2021 16:58:11 No.12990341 Report

Quoted By:

>>12988775
lmao

Anonymous

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Anonymous Sat 17 Apr 2021 17:05:46 No.12990367 Report

Quoted By:

>>12981308
Awww it's okay you'll be black soon and the world will be one. Love Israel. You Anti-Semite.

Take the vaxx.

You silly cattle. Good cattle. Good boy.

Anonymous

Anonymous Sat 17 Apr 2021 17:24:31 No.12990422 Report

Quoted By: >>12990432 >>12990660

>>12981299
Covid will never go away. It spreads too easily and has mutated to different variants. It will always be a catch-up game to get a new vaccine or boosters out and people don’t want to lock down anymore.

>I don't understand how this thing isn't going to kill all of us.
Of the ~141M known cases, ~3M died. Not exactly black plague numbers of a death rate but who knows what will happen with future variants and how people act.

Anonymous

Anonymous Sat 17 Apr 2021 17:26:25 No.12990432 Report

Quoted By:

>>12990422
died with covid, not from

Anonymous

Anonymous Sat 17 Apr 2021 18:11:21 No.12990660 Report

Quoted By:

>>12990422
>people don’t want to lock down anymore.
I pray this happens.

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Anonymous Sat 17 Apr 15:21:11 2021 No.12990001 View Reply Original Report

Quoted By:

Alright let's get this out of the way once and for all
https://www.strawpoll.me/42954531

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Anonymous

Anonymous Sat 17 Apr 2021 16:43:27 No.12990278 Report

Quoted By: >>12990382

>>12990163
I think this is a bit misleading, or perhaps there is not a clear way to pick the correct frame. You can just as easily justify the cube being like Buster Keaton standing still as the barn wall falls with a perfectly placed window allowing him to stay in place and unmoving. Then it would simply be an interesting interaction of gravity. I'm curious how gravity would act or bend space-time near the portals. If orange and blue were stationary, but blue was near Jupiter and orange near Earth, would you get sucked into blue?

Anonymous

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Anonymous Sat 17 Apr 2021 16:45:16 No.12990285 Report

Quoted By:

>>12990163
Here I fixed op's image for you

Anonymous

Anonymous Sat 17 Apr 2021 17:09:53 No.12990382 Report

Quoted By: >>12990445

>>12990278
As far as force and field propagation, I've no idea - but as far as just simple motion between frames goes the only logically and physically consistent model is one where the momentum with respect to the aperture is conserved as objects cross between reference frames.

Ex.
>Train A is travelling East at 40 MPH and has a portal on the West interior wall that connects to Train B.
>Train B is travelling West at 30 MPH and has a portal on the East interior wall.
>An observer on Train A throws a ball through the portal at 20 MPH.
>An observer on Train A reckons that the ball enters the portal going 20 MPH West and leaves the portal going 90 MPH West.
>An observer on Train B reckons that the ball enters the portal going 50 MPH East and leaves the portal going 20 MPH West.
>An observer on the side of the tracks reckons that the ball enters the portal going 20 MPH East and leaves the portal going 50 MPH West.
>The portal reckons the ball approaches at 20 MPH and then leaves at 20 MPH.
All *apparent* changes in momentum are due to fictitious forces resulting from the transition between different reference frames.

Anonymous

Anonymous Sat 17 Apr 2021 17:28:43 No.12990445 Report

Quoted By: >>12990657

>>12990382
Your reference frames seem consistent, but I have no paper to draw it out visually and confirm. If that is true, what is your intuition for OP pic?

Anonymous

Anonymous Sat 17 Apr 2021 18:10:13 No.12990657 Report

Quoted By:

>>12990445
B - obviously

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What are your thoughts on SpaceX’s Starlink?

Anonymous Thu 15 Apr 15:38:03 2021 No.12979071 View Reply Last 50 Original Report

Quoted By: >>12989560

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Anonymous

Anonymous Sat 17 Apr 2021 09:06:27 No.12989084 Report

Quoted By: >>12989536

I recently purchased a telescope with 3000x zoom and saw absolutely nothing through it. Even pointing it at the sky DURING THE DAY you couldn't see shit like clouds or anything.

I didn't link it at first but now that I get it it's because those retarded satellites in space clogging up the sky view.

Anonymous

Anonymous Sat 17 Apr 2021 12:10:30 No.12989532 Report

Quoted By:

>>12987090
>Does anyone know if $99 a month is actually profitable considering a decent adaption rate and sat replacement costs?
In terms of satellites and ground maintenance yes, it'll be (mildly) profitable. The big economic challenge right now actually is the terminal. Initial estimates were that it probably cost around $2000, not $500, though I remember seeing they'd managed to bring it to around $1000 as they scaled up and refined it. But they really need to get that down farther in mass production. It's not an issue in beta since the absolute volume is so limited, but if they want to avoid a cell subsidy model (which, granted, obviously can work) of "$500 with 2 year contract" it's an issue. I don't know how the whole chip and fabrication shortages might fuck things up for them also.

Some of the REALLY huge profit centers though are yet to come, since they require intersat optical links which are only at v0.9 and only deployed on solar sats right now. Those include commercial marine shipping, aerospace, mobile military, etc., places that right now pay through the nose for MEO/GEO sat links at best which are complete shit and that's it, they literally have zero other options. SpaceX could charge $1000-10000/month or more for some of these and it'd be a fucking BARGAIN vs what they pay now. Mature Starlink will also do lower latency between continents, so they'll be able to dip into the immensely profitable HFT sector.

Finally there's the long tail of poorer countries. Starlink is fixed cost and fixed maintenance for coverage, covering a continent/poles is the same as covering the world. Once they're up and running in America/Canada/Australia, maybe parts of Europe, every marginal dollar turns pretty pure profit after that if terminals get covered. Even if they charge $5/month to 3rd worlders (with some charity footing the bill for the terminal, or maybe a bunch of mudhuts split the cost or something) they'll still make money.

Anonymous

Anonymous Sat 17 Apr 2021 12:12:38 No.12989536 Report

Quoted By:

>>12989084
u need to paint the lens black to block out extra light and the sun! professional scopes come pre painted but they charge thousands for it you can diy way cheaper then u are set for star viewing even in day time

Anonymous

Anonymous Sat 17 Apr 2021 12:25:52 No.12989560 Report

Quoted By:

>>12979071
BasedLink... will be used for control later.

Anonymous

Anonymous Sat 17 Apr 2021 18:09:38 No.12990655 Report

Quoted By:

300 Mbps by end of year lets fucking go

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Anonymous Sat 17 Apr 05:13:35 2021 No.12988433 View Reply Original Report

Quoted By: >>12990584 >>12990654

Is Quine /sci/ approved?

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Anonymous Sat 17 Apr 18:01:31 2021 No.12990616 View Reply Original Report

Quoted By: >>12990645

How are evolution-denying Christians able to reject scientific consensus without their brains fucking exploding from contradictions with nature that their worldview asserts?
I've taken on a habit of watching fundamentalist sermons on youtube recently and this video https://www.youtube.com/watch?v=PbcY9iya40o is my latest watch. I'm not a Christian or anything, it's just something I enjoy doing, not sure why.

Are they just completely fucking ignorant of the science? Do they willfully ignore the evidence?
Please help me to understand this mindset.

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Anonymous Fri 16 Apr 19:07:23 2021 No.12985111 View Reply Last 50 Original Report

Quoted By:

He did it. The crazy son of a bitch did it.

SpaceX win the bid for the NASA lunar lander.

Link:
https://www.washingtonpost.com/technology/2021/04/16/nasa-lunar-lander-contract-spacex/%3foutputType=amp

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Anonymous

Anonymous Sat 17 Apr 2021 17:59:00 No.12990604 Report

Quoted By:

>>12990551
holy shit that spacex utter domination. nasa uses dry bureaucratic language to utterly btfo other teams
>4 out of 6 critical communication links currently impossible. 1 questionable
>also these people have no idea what they are doing
>and they demanded moneys up front despite being backed bu the richest man on the planet
oh is that all?

Anonymous

Anonymous Sat 17 Apr 2021 17:59:05 No.12990605 Report

Quoted By:

>>12989841
>ok so basically Dynetics proposal starts off by requiring an antigravity system, and then goes from there. Unless you're REALLY planning to spring quite the surprise on the NASA evaluation committee by like, arriving on your floating flying building or something, that's not a very good sign for your proposal. It's like that ancient science joke cartoon with two guys in front of a black board where step 2 is "and then a miracle occurs".
kek

Anonymous

Anonymous Sat 17 Apr 2021 18:00:44 No.12990612 Report

Quoted By: >>12990638

>>12990551
>Mass estimate physically impossible and at negative margin
oooh

Anonymous

Anonymous Sat 17 Apr 2021 18:05:50 No.12990638 Report

Quoted By: >>12990650

>>12990612
>that only counts as an orange not a red
Oh Nasa you silly scamps!

Anonymous

Anonymous Sat 17 Apr 2021 18:08:58 No.12990650 Report

Quoted By:

>>12990638
Nasa didn't make the chart. Its from NSF. You're free to make changes.

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/sfg/ Space Flight General

Rigorous or simplified text for a first exposure?

Flaws in the race theory

What are your thoughts on SpaceX’s Starlink?