Lmst

#Minecraft #MinecraftMeme #MinecraftMemes #VideoGame #VideoGames #Gaming #GamingMeme #GamingMemes #Meme #Memes

#FTL #Multiverse auf dem knapp 10 Jahre alten Zenbook mit Kubuntu installiert. Zack 95% RAM voll. Hätte gerne KDE Plasma auf allen Geräten, aber ich fürchte, da muss ich mir was überlegen.

#Videospiele

Overheard a TV show about aliens. Flying saucers, abductions, investigations, that sort of thing.

Somebody on the show claims that aliens have reactionless propulsion that moves the ship by distorting spacetime.

That's the definition of a #warp drive! If #aliens have that tech, a lot of Earthlings (including me) are gonna want to know how it works.

They're also babbling about how the ayys have stabilized element 115 and somehow use it for #FTL. Sounds pretty bogus. It's not exotic matter.

RNGesus keeps giving me quests in this sector

https://startrek.website/post/34569019

Well, fuck

https://startrek.website/post/34478231

Spaceship Fuel - Live at RadioSpiral 23 July 2025

https://youtu.be/C0Rf25KiVDI

> This strange substance is what enables ships going faster than light. #ambient #ftl #music Next Wednesday live at my show El Telescopio on https://radiospira...

I of course goofed and left out the explanation of Lorentz Contraction from the obvious place in Part 3 where I should have talked about it.

So I've slotted it in here:
https://wrog.dreamwidth.org/71271.html#hrel3_lorentz
along with a new diagram to make super-clear what's happening.

Or if you want to get the flow/parallelism there's now this link https://wrog.dreamwidth.org/71271.html#hrel3_timedil
to the earlier time dilation discussion (cleaned up a bit), since that's really the same issue but turned on its side 90°.

So maybe the Stargate SG-1 example will be clearer now. or maybe not
(the point of the blue arrows is this is the kind of shit you can do if you have stargates: A Completely Easy Time Machine they'd have built half-way thru season 2)

#relativity #physics #ftl #scienceed

How to draw this:
From a point in the center of the page
draw two yellow-dashed rays sloping left-up and right-up at 45° to the edge of the page. Mark the right angle between the two rays. ([center] pt)
On each of these mark a point near the corner right before it runs off of the page ([upper-left] pt and [upper-right] pt)

From [upper-right] draw a downwards-left blue arrow, slope 3/2, to a point directly below [center],
label that "moving Now snapshot"
label the destination "Here and Now"

Draw up-left (slope −3/2) blue arrow from "Here and Now" to [upper-left]
label that "stationary Now snapshot"

Draw black segment from [upper-left] slope −2/3 to intersect at right angles with downwards arrow,
label that "1-unit-up Stationary Person"
label intersection "where 1-unit-up Stationary Person is Now according to Moving People"

Draw black segment from [upper-right] slope 2/3 to intersect at right angles with upwards arrow,
label that "1-unit-up Moving Person"
label intersection "where 1-unit-up Moving Person is Now according to Stationary People"

Draw 2 short black segments through "Here and Now"
one slope 2/3 labeled "Moving Here"
one slope −2/3 labeled "Stationary Here"

Part 4:
https://wrog.dreamwidth.org/71432.html

#physics #relativity #ftl #scienceed

On the Storrow Drive Theorem

This is on how, having developed how one does spacetime for a 1-dimensional universe, how you put back the 2nd and 3rd spatial dimensions,

and the key question is what happens when you have college students attempting to measure the height of a bridge using rental trucks,

i.e., what differences are there in how the Moving People see it vs. how the Stationary People see it. Do the Moving People see a different height? Or see the truck slanted weirdly? Curiously, the answer to both of these turns out to be NO.

And we have this fun diagram

How to draw this:

black line, slope 1/2 (rising left to right)
Dots (events) on it, equally spaced:
'Sent' near the left edge
'Halfway Tick' in the middle
'Received' near the right edge
label "Δt" on either side of 'Halfway Tick'

blue line, slope 2, through 'Halfway Tick' to top edge
Dot 'Ground Zero' down a bit the top edge
label "Δz" for segment above 'Halfway Tick'

black line through 'Ground Zero', parallel to first line,
label "Ground Zero Moving Person, no no no aaaaaa"

two black segments join 'Ground Zero' to 'Sent' and 'Received'
label "interval = -y²

larger dot 'Overpass' above+a bit left of 'Ground Zero'
+ dashed yellow segments join 'Overpass' to 'Sent' and 'Received'
depicted as if above the page
'Ground Zero'-'Overpass' labeled 'y'

Mal wieder #IntotheBreach und #FTL (+Multiverse) installiert. Leider ist letzteres nicht so gut am Steamdeck spielbar, aber beide Spiele sind so gut! 😃 Bin schon auf das nächste Spiel von Subset Game gespannt, das auf dem PC erscheint.

#Videospiele

Part 3:
https://wrog.dreamwidth.org/71271.html

…introduce the _Interval_ between two events

= (Δz, spatial separation)² − (Δt, time lapse)²

and show that this number is an **invariant**, i.e., all slower-than-light observers get the same result calculating this in their own coordinates.

Magic diagram (with ALT text!) below proves this for Moving (upwards) vs. Anti-Moving (downwards, same speed) observers (i.e., using that Intermediate POV from before), and go from there.

Interval is either
(*) (proper distance)² > 0 [events are simultaneous for somebody],
(*) −(proper time)² < 0 [events are co-located for somebody], or
(*) zero [light-speed trajectory]

and then we do Twin Paradox and How FTL Violates Causality.
#physics #relativity #ftl #scienceed

How to draw this:

Pick a pt (1st) anywhere in the upper left quadrant.

From 1st pt, draw two yellow, dashed rays
(*) 45° up+right
(*) 45° down+right
On each, pick a pt (2nd & 3rd) near edge of page.

Connect 2nd & 3rd with dotted red segment;
use as diameter for a (pencilled in) circle
(with 1st point on it somewhere; yay circle theorems!).

Pick a number A ≈ 20. From the 2nd pt, draw:
(*) Black line shallow down+left (45−A)° to circle
(*) Blue arrow steep down+left (45+A)° to circle
Endpoints are 'Event' and 'Other Event' respectively.

From 3rd pt, draw:
(*) Black line (shallow up+left, (45-A)°) to 'Other Event'
(*) Blue arrow (steep up+left, (45+A)°) to 'Event'

Mark 1st pt, 'Event', and 'Other Event' as having 90° angles.

Erase the circle.

I also really like how this diagram came out.

It's another spacetime-with-left-to-right-time grid from the stationary observer POV, showing trajectories of
(*) the stationary observer,
(*) the (velocity v) moving observer, and
(*) all possible in-between trajectories
+
how the two observers measure velocities
+
how the two observers will **not** agree on which trajectory is going v/2
+
how the One True Intermediate Trajectory
(i.e., the one that both see going the same speed) is between the v/2 trajectories **and** seen by both observers as going **faster** than v/2.

...this being the Big Red Flag that velocities don't add the way you'd think.

(also spelled out more fully in Part 2)

#physics #relativity #ftl #scienceed

3 vertices: bottom left, bottom right, top right
forming a right triangle

bottom (horizontal) side is labeled
vₘ = v, vₛ = 0, vₛ−vₘ = −v

hypotenuse (sloped ~35°) is labeled
vₘ = 0, vₛ = v, vₛ−vₘ = +v

(vertical) right side is a blue upwards arrow

Add a slanted downwards-left arrow from the top vertex
to a bit past the middle of the bottom side

Add hints of all possible lines through bottom-left vertex
ranging from horizontal to hypotenuse slope.

Emphasize two of them:

(*) one intersects upwards/vertical arrow
half way up, labeled vₛ = v/2

(*) one intersects slanted arrow
half way up, labeled vₘ = v/2;

Third line, in-between, colored red, labeled vₛ−vₘ = 0

Part 2:
https://wrog.dreamwidth.org/71156.html

In some ways, the following diagram is the whole ball of wax, essentially summarizing why the moving observer will *not* agree with stationary observer on simultaneity of events.

It's a spacetime diagram with time going left to right, depicting someone moving upwards (black line), bouncing a light ray off of a reflector above/below them (yellow lines).

If you get what's going on here, why the moving person''s '"snapshot" (blue line) of what's going on Right Now cannot be vertical (i.e., aligned with the stationary person's snapshots), you can derive everything else.

(see the full post for the actual argument)

#physics #relativity #ftl #scienceed

Yellow dashed rectangle tilted at 45°,
the longer side running lower left to upper right.

Its corners are labeled as follows:
(*) left = 'Sent'.
(*) right = 'Received'.
(*) top = 'Upper Bounce'.
(*) bottom = 'Lower Bounce'.

The center is labeled 'Halfway Tick'.

Black line runs through 'Sent' and 'Received'.
Blue line runs through the Bounces.
The lines cross at 'Halfway Tick'.

Two more magenta dashed lines come out of 'Halfway Tick' at 45°,
dividing the rectangle into quarters.

I decided it was time for another go at explaining Special Relativity.

I remain annoyed at how few people really get it, even amongst avid SF consumers, who have gotten entirely too accustomed to generations of SF writers papering over the FTL issues with technobabble, 'cause we need that galactic empire, don'tcha know.

The idea is to do this with basic geometry you knew or could have learned about in 6th grade plus a bit of algebra (up to Pythagorean Theorem, which I *definitely* remember our math classes teaching in 6th grade).

I think I can get by without using a single square-root sign.

Anyway, here's part 1:

https://wrog.dreamwidth.org/70909.html

#physics #relativity #ftl #scienceed

@kis
Yo vuelvo a proponer FTL: Faster Than Light

- Jueguito espacial de vivir una aventurilla salvando al universo.
- Tus decisiones tienen peso, vaya que si. Eres un héroe o haces lo que sea por sobrevivir?
- 12 horitas pasarselo, que no deja de ser un roguelike de microgestión.
- Divertido el jugar con otra persona o personas de 'copiloto'.
- Está la edición especial en GOG a menos de 2.5

#FTL #ClubComentacionVideojueguil

https://www.gog.com/en/game/faster_than_light

To end a horrible day of news both personal and international, a glimmer of hope in that dreams might come true...

https://thedebrief.org/new-warp-drive-propulsion-concept-moves-fictional-starships-closer-to-engineering-reality/
#WarpDrive #Space #SpaceTravel #FTL

started to model my own interpretation of what the FTL ships would look like in 3D

#FTL

I love #scifi so much. I love the absurd assumptions about realworld physics a little less, especially when there are other means toget the same result. #Astrophysics is where smartypants form an #ourobouros konga line of neverending underinformed pop knowledge.
This zine isn't a pro article but I tried to catch some on the misconceptions. Maybe there will eventually be a longer one, physics is SO COOL!

https://ranarh.itch.io/lightspeed

#lightspeed #photons #ftl #cinema #minizine #zinester #zine

#FTL

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