ELI5: How non-euclidian geometry reconciles lines of latitude with the premise that all parallel lines on a sphere intersect

Lines of latitude are parallel because they intersect the same line of longitude at the same angle, yet they never meet.

Lines of longitude are parallel because they intersect the same line of latitude at the same angle, but they meet twice.

Non-euclidian geometry inverts the fifth premise of euclidian geometry by stating that parallel lines on a sphere will intersect.

Are lines of latitude not truly parallel in non-euclidian geometry? If so, how does NE geometry define "parallel lines"? Or does this premise better phrased as "parallel lines on a sphere may meet" rather than "must meet'?

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πŸ‘€︎ u/Trailmagic
πŸ“…︎ Aug 23 2019
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Comparing the latitude of North America with Europe and North Africa
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πŸ‘€︎ u/pleudofo
πŸ“…︎ Nov 11 2019
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Showing 10 bands of latitude with equal population [OC]
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πŸ‘€︎ u/neilrkaye
πŸ“…︎ Aug 16 2019
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10 bands of latitude each with the same area of land [OC]
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πŸ‘€︎ u/neilrkaye
πŸ“…︎ Oct 29 2019
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Why is Greenland almost fully glaciated while most of Northern Canada is not at same latitude?

Places near Cape Farewell in Greenland are fully glaciated while northern Canadian mainland is not, e.g. places like Fort Smith at around 60Β°N. Same goes on for places at 70Β°N, Cape Brewster in Greenland is glaciated while locations in Canada like Victoria Island aren't? Same goes for places in Siberia of same latitude. Why?

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πŸ‘€︎ u/floatingsaltmine
πŸ“…︎ Sep 22 2018
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Plankton, responsible for 70 percent of Earth's oxygen, are fleeing the mid latitudes and headed north. "It means that even if we manage to keep the global temperature rise below 1.5 degrees, which is doubtful, ecosystems around the globe are likely to be profoundly affected." phys.org/news/2019-05-mig…
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πŸ‘€︎ u/Bluest_waters
πŸ“…︎ May 22 2019
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Found this strange file in Nord VPN app data for Linux with latitudes & longitudes of my actual location.

Can someone shine some light? Why do they need latitude and longitude? If the nearest server location is all they need, city name would be more than enough I guess.

https://i.imgur.com/UQyWlpv.png

Edit - Contacted the support and they promised a senior rep would get back to me within 1 or 2 days. Lets see!

Update (April 23) - Received an Email from the Nord team.

I'm contacting you on behalf of recent chat session you've had with one of our agents.

We do not track or store any personally identifiable information. Upon connecting to a VPN server, our applications send a call to our API, which has access to a geo IP database for determining an approximate user location. This is done so that the app could identify the best server for the user and connect to it. The location data is then stored locally, on the user's device. We do not save this information anywhere else.

Without storing that information, the app would be unable to determine the best server in cases when the user is already connected to a VPN server. If the user clicked 'Quick connect' while connected to a remote server, the app would choose where to connect from the server's standing point, not from the customer's perspective.

The folder that contains the location data can only be accessed with root privileges. We could use ping to determine the best server as well, which we did in the past. However, pinging more than 5000 servers would take a lot of time and device resources. The method we're using right now doesn't compromise users' privacy and is a lot more efficient.

If you have any additional questions, don't hesitate to ask.

My takeaway- Meanwhile, I dug into the permissions of that file yesterday. User can only view the file if he opens but the latitudes/longitudes are hidden with a different encoding. This file is set to immutable so that even a root user can't change the permissions to it unless you change the attribute and take the ownership. I guess it's safe to assume they're right. What freaked me out initially is, the location data was so close to my home. I guess it's just coincidence hopefully from their geo IP database(Other Nord users can confirm if it's the same). If you're still paranoid or don't believe them, there's always a possibility to use Open VPN client instead of their default client.

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πŸ‘€︎ u/watchdog4u
πŸ“…︎ Apr 22 2019
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Everything Hillary said in 2016 has come to fruition so why do reporters still act so goddamn arrogant & dismissive of her. Compare to the latitude & deference given to Pompeo or Tillerson. If nothing else, you’d think some of these folks would at least try harder to hide sexism. twitter.com/adamparkhomen…
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πŸ‘€︎ u/worldgoes
πŸ“…︎ Oct 18 2019
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What forces does a rock resting on the ground experience that make it stay on a line of latitude which, if it were a road, you'd actually have to steer left or right to stay on?

Gravity pulls it down toward the center of the earth, I know. And gravity is counteracted by an upward force from the ground, so it neither rises into the air nor sinks into the ground.

But it has some eastward velocity, and east curves to the left in the northern hemisphere (right in the southern).

If a counteraction of gravity is the only force coming up from the ground, how could it follow a horizontally curved line of latitude and keep going east indefinitely? All circumferences intersect the equator, and every movement along a non-equatorial circumferences changes one's yaw (relative to north).

Satellites never maintain a constant non-zero latitude like objects on earth. What forces aren't being applied to satellites but are being applied to resting objects that maintain non-zero latitude? How can they keep going east?

Pitch, roll, and yaw of the rock (relative to an initial reference frame) all change throughout the day. An object simply rotating in inertial space could not do that (and satellites don't).

Is there a name for these forces?

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πŸ‘€︎ u/rzyn
πŸ“…︎ Dec 29 2019
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Capital cities of Europe replaced by the largest city in North America by latitude.
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πŸ‘€︎ u/havedal
πŸ“…︎ Sep 23 2019
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10 bands of latitude with equal land area
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πŸ‘€︎ u/neilrkaye
πŸ“…︎ Aug 16 2019
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Vast stretches of Earth’s northern latitudes are on fire right now. Hot weather has engulfed a huge portion of the Arctic, from Alaska to Greenland to Siberia. earther.gizmodo.com/satel…
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πŸ‘€︎ u/maxwellhill
πŸ“…︎ Jul 20 2019
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Windows N T3.51 on a dell latitude d630 v.redd.it/t6sgm6d1cui61
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πŸ‘€︎ u/Michael556673
πŸ“…︎ Feb 21 2021
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Henry Wadsworth Longfellow's "The Song of Hiawatha"... Nokomis/Nakomi, Gitara Moroso, Rand, Aviendha, Mat, and other Wheel of Time parallels.

I really hope at least a few people read all the way through this haha because I spent several hours on this and would love to discuss.

In a Dusty Wheel video, Matt Hatch briefly mentions that Jordan was inspired for Nakomi by Henry Wadsworth Longfellow's epic poem "The Song of Hiawatha" and he said "go read it" so I did :).

Ya'll, this poem is LONG. I searched and only saw a brief mention of it ever on the sub, so I read the whole thing and took notes and WOW, there are some very intriguing similarities and parallels to WoT. I tried to break it into sections but a lot of it is connected:

  • Gitche Manito (Manitou is the spiritual life force among a certain Native American theology. Some have translated "Gitche Manitou" as akin to "God"), he is connected to the wind, he smokes a pipe and declares to humanity "I will send a Prophet to you, a Deliverer of the nations." (Who shares the same initials and also declared the coming of a Messiah? Gitara Moroso. More on this below.)

  • "The Great Serpent, the Creator..." (obvious WoT parallel)

HIAWATHA / RAND:

  1. "In the days that are forgotten, in the unremembered Ages, from the full moon fell Nokomis, fell the beautiful Nokomis, She a wife, but not a mother." (Nokomis has a daughter who gets impregnated by the West Wind, gives birth to Hiawatha, dies, and Nokomis raises him.)

  2. "Two good friends had Hiawatha, singled out from all the others, bound to him in closest union..." (sounds like the ta'veren)

  3. "He it was who brought the morning." (sounds like He Who Came With the Dawn)

  4. Hiawatha falls in love with Minnehaha (first three letters are Min)

  5. Nokomis warns Hiawatha not to fall in love with a stranger but to "wed a maiden of your people."

  6. "And the heron, the Shuh-shuh-gah, Far off on the reedy margin, Heralded the hero's coming." (A heron signaling the hero, just like Rand)

  7. "Lo! How all things fade and perish! Great men die and are forgotten, wise men speak, their words of wisdom perish in the ears that hear them..." (sounds like Rand's speech on top Dragonmount)

  8. Hiawatha sees "all the secrets of the future" in a vision, including people arriving from the West and a dark vision of "the remnants of our people sweeping westward" and "our nation scattered, all forgetful of my counsels, weakened, warring with each other". **(This clearly reminds me of the Seanchan arriving from the west, causing strife

... keep reading on reddit ➑

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πŸ‘€︎ u/FusRoDaahh
πŸ“…︎ Dec 28 2020
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TIL Victor Vescovo is the first and only person to have dived to the deepest points of all of Earth's oceans. He's also climbed the highest mountains on each continent and skied the Last Degree of Latitude at the North and South Poles. edition.cnn.com/travel/ar…
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πŸ‘€︎ u/RunningFromFOMO
πŸ“…︎ Mar 12 2020
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The Great Pyramids, El Giza, and the city of Cairo photographed from space by an International Space Station astronaut orbiting above Egypt (latitude 28.4, longitude 32.0) on 24 August 2018 at 12:32:42 GMT. eol.jsc.nasa.gov/Database…
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Sep 24 2019
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Partial teardown of Dell latitude 740 v.redd.it/0e3q6ae601m41
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πŸ‘€︎ u/X1XN0B0DYX1X
πŸ“…︎ Mar 11 2020
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Latitude E6400 2.40GHz 4GB of RAM for $100. good deal or nah?

I'm looking for a cheap sub $150 laptop to take on tour that I can use to maybe run early current gen titles on low settings as well as do some Ps2/gc emulation. Is this a good deal?

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πŸ‘€︎ u/regent1001
πŸ“…︎ Aug 08 2019
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Lost a Latitude 64 Opto River a few months ago at my local course. Every time I’ve been back I’ve searched the hole up & down with no luck. Was taking a quick run at a few holes there before a work event last night & finally saw a few slivers of yellow peeking out at me! Must've been my lucky day.
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πŸ‘€︎ u/AManWhoSellsFish
πŸ“…︎ Oct 30 2019
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TIL I learned that the Timberwolf is one of the most endangered species of animals in the whole world. In fact the Timberwolf used to roam as far south as 15Β°N latitude. en.m.wikipedia.org/wiki/W…
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πŸ‘€︎ u/Marius_34
πŸ“…︎ Jul 01 2019
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Earth photographed from the International Space Station while orbiting above Republic of Niger (latitude 18.3, longitude 11.0) on 7 February 2020. Photo credit: National Aeronautics and Space Administration (NASA), United States of America eol.jsc.nasa.gov/Database…
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Feb 22 2020
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It seems insane to think that we live in a world where an egg timer app needs my location to figure out the boiling point of water at my latitude.
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πŸ‘€︎ u/poopydooopy
πŸ“…︎ May 23 2016
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Maria Tharp took those thousands of sonar readings and literally drew the underwater details of the ocean floor, longitude degree by latitude degree and was one of the most important people in mapping the immense detail of the ocean floor.
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πŸ‘€︎ u/MessyGuy01
πŸ“…︎ Feb 20 2020
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Mexican cities replaced with cities of similar latitude from other countries [OC]
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πŸ‘€︎ u/isaurolr
πŸ“…︎ Jul 03 2019
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Had the pleasure of starting the new year with a Kea Colada and Zombie from Latitude 29 in New Orleans
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πŸ‘€︎ u/AnElepahntCage
πŸ“…︎ Jan 05 2020
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Showing 10 bands of latitude with equal population [OC]
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πŸ‘€︎ u/qartas
πŸ“…︎ Aug 17 2019
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TIL about null island, a buoy off the coast of africa that sits on 0 longitude and 0 latitude which causes computer programs to mistaken it as a real island youtu.be/bjvIpI-1w84
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πŸ‘€︎ u/markymarkfro
πŸ“…︎ Apr 08 2020
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How Bernie Sanders is Reviving the Promise of FDR’s Economic Bill of Rights. There are deep parallels between what Bernie Sanders is proposing and what Franklin Delano Roosevelt promised. progressive.org/dispatche…
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πŸ‘€︎ u/mixplate
πŸ“…︎ Feb 25 2020
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Franco Columbu, a legend of bodybuilding golden era, passed away today, here he is helping a parallel parked car to get away (at the end, he is blowing up a hot water bottle until it pops) youtube.com/watch?v=7hnPw…
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πŸ‘€︎ u/fakint
πŸ“…︎ Aug 31 2019
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What is the name of this style of longitude/latitude map?
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πŸ‘€︎ u/hotlips4
πŸ“…︎ Nov 07 2019
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A great thread on the impact of Starlink, OneWeb & Kuiper on the night sky: "At the latitudes of astronomical observatories the number of sunlit and likely visible satellites will be around 100 during the 6 hours of twilight each night" twitter.com/cgbassa/statu…
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πŸ‘€︎ u/LazyRider32
πŸ“…︎ Oct 20 2019
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Latitude 9510 - Any fans of business laptops? google.com/amp/s/www.enga…
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πŸ‘€︎ u/ecalex
πŸ“…︎ Jan 02 2020
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Can't get parts from Dell, charger making loud sound, battery holds 1 hour of charge. Dell Latitude 5480 i7-7820HQ, any suggestions where I can buy the pieces from?
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πŸ‘€︎ u/BameJuan64
πŸ“…︎ Jan 28 2020
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Map of countries due east/west based on latitude.
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πŸ‘€︎ u/the_john_oshea
πŸ“…︎ Jun 12 2019
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This image basically sums up the amount of computers with every single one except my Latitude D420 which got after I took this photo.
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πŸ‘€︎ u/Catman8976
πŸ“…︎ Apr 21 2019
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I wish we got the CDQ version of "Latitude"

The lyrics from the snippet just hit me every fucking time I am listening to it, it sounds so pure

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πŸ‘€︎ u/_halix_
πŸ“…︎ Dec 18 2019
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Latitudes of Old World Cities Mapped onto the New World
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πŸ‘€︎ u/happinessmachine
πŸ“…︎ Sep 30 2019
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Map of Argentina (not considering territorial claims) with other world cities at the same latitude (opposite values for the northern Hemisphere) [OC] [1920 Γ— 4055]
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πŸ‘€︎ u/Yearlaren
πŸ“…︎ Mar 13 2018
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The ideal length of latitude.
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πŸ‘€︎ u/Xianthamist
πŸ“…︎ Aug 12 2019
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Latitudes of North and South Hemispheres Compared
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πŸ‘€︎ u/northgrave
πŸ“…︎ Jul 09 2019
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Just received my PDGA membership package today.... ‘‘Ya ya!! They included this disc from Latitude 64° with a sweet graphic (plus a mini with the same graphic)! Not to mention a bunch of other cool stuff. Anybody know anything about it? Give the low down pretty please!
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πŸ‘€︎ u/tyeyeRee
πŸ“…︎ Jan 15 2019
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Here's a cool plot I just made: "Mean Latitude and Longitude of MLB Players by Birth City (1871-2015)". Thoughts?
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πŸ‘€︎ u/FDTAEV
πŸ“…︎ Mar 04 2016
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I am 4 Parallel Universes ahead of you.
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πŸ‘€︎ u/LeeZarock
πŸ“…︎ Jan 31 2020
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ELI5: Why does color negative film have more stops of latitude then color reversal (slide) film?
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πŸ“…︎ Mar 25 2020
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Comparing the latitude of Europe and America
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πŸ‘€︎ u/Mick_Stup
πŸ“…︎ Sep 21 2019
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Parallel landing at SFO of an ERJ 170 and a B777! ✈️ v.redd.it/2spq61dmy0y31
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πŸ‘€︎ u/airtravelhub
πŸ“…︎ Nov 11 2019
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Why aren't lines of latitude consider parallel?
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πŸ‘€︎ u/klawehtgod
πŸ“…︎ Apr 04 2015
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