ellestones Posted July 23, 2018 Share Posted July 23, 2018 i was thinking about how far away is the SL sun. I know right! but yanno far away meaning relative to the distance between realworld earth and sun what I came up with follows - the earth rotates full circle in about 1440 minutes - earth radius is about 6.4 million kms - circumference then about 40 million kms - an earth peg on the surface at the equator travels 40 million / 1440, approx. 28kms per minute - the number of earth rotations in its orbit around the sun is approx. 365 - rotation distance by an earth peg at the equator is 365 * 40 million kms. 14,600 million kms - the distance from earth to sun (orbit radius) is approx. 149.6 million kms - the orbit distance (circumference) then about 940 million kms - unrolled the earth peg travels 14,600 * 940. 137,240,000 million kms in 1 earth orbit - when we divide this by the rotation speed 28 kms then scale 1:4,901,428,571 applying this to a SL region - a region rotates full circle in about 240 minutes (relative to the SL sun) - the diagonal of a region is about 0.362 kms. Radius half this - circumference then about 1.137 kms - a region peg on the surface at the region equator travels 1.137 / 240, 0.0047375 kms per minute - multiplying this by the earth scale then: 23,220,518 - dividing this by 1.137 gives us a region orbit around the SL sun of 20,422,619 kms - the radius of this (distance to SL sun) is approx: 3,250,360 kms i just wonder if there is an easier way to calculate this, or have I made a logical error and what I think is the answer is wrong ? 1 Link to comment Share on other sites More sharing options...
Callum Meriman Posted July 23, 2018 Share Posted July 23, 2018 We know SL is flat, this is an established and immutable fact. The sun rotates around the world. The sun is also in an elliptical orbit. It takes 3 hours to travel from 0° to 180° then 1 hour to travel under the planet. So we should probably work on the distance at aphelion, or noon when the sun is at it's furthest from the sim surface. Tyche tells us the usable surface of the planet is 3050km2 so so that's 55km x 55km - but then there is a lot of void water which needs to be taken into account. The SL land purchasing portal backed up with Firestorms map suggests sims exists in world from world position <400,400> to <1400,1400> so this is 256kmx256km meters or 65536km2. 2 Link to comment Share on other sites More sharing options...
Skell Dagger Posted July 23, 2018 Share Posted July 23, 2018 93 million prims, surely? 4 Link to comment Share on other sites More sharing options...
Paul Hexem Posted July 23, 2018 Share Posted July 23, 2018 44 minutes ago, Callum Meriman said: We know SL is flat, this is an established and immutable fact. The sun rotates around the world. I feel like this deserves a flat earth meme. 4 9 Link to comment Share on other sites More sharing options...
Nova Convair Posted July 23, 2018 Share Posted July 23, 2018 2 hours ago, ellestones said: - the earth rotates full circle in about 1440 minutes - earth radius is about 6.4 million kms - circumference then about 40 million kms - an earth peg on the surface at the equator travels 40 million / 1440, approx. 28kms per minute Umm ... needs recalculation. earth radius is 6.4 million m or 6400 km. Assuming that kms means km 1 Link to comment Share on other sites More sharing options...
ellestones Posted July 23, 2018 Author Share Posted July 23, 2018 @Nova Convair I felt there was something wrong with this. Couldn't see it and here you are. Thanks Link to comment Share on other sites More sharing options...
Phorumities Posted July 23, 2018 Share Posted July 23, 2018 Why is it that the SL moon moves thru the night sky but the stars remain stationary? Why is the moon always full? And why can't we see the disk of the SL sun instead of some indiscrete blob of light? Link to comment Share on other sites More sharing options...
Derekmate Posted July 23, 2018 Share Posted July 23, 2018 Second Life just as the real earth is flat and the sun and the moon s hanged in. Link to comment Share on other sites More sharing options...
ellestones Posted July 23, 2018 Author Share Posted July 23, 2018 1 hour ago, Callum Meriman said: We know SL is flat, this is an established and immutable fact. The sun rotates around the world. The sun is also in an elliptical orbit. It takes 3 hours to travel from 0° to 180° then 1 hour to travel under the planet. So we should probably work on the distance at aphelion, or noon when the sun is at it's furthest from the sim surface. i did look at it from the flat earth perspective as well. I think though that the algorithm steps are the same. I am just not sure they are. I already got a input value wrong so I could be wrong on the steps as well Link to comment Share on other sites More sharing options...
Qie Niangao Posted July 23, 2018 Share Posted July 23, 2018 At any instant, llGetSunDirection() is the same across the grid* so the sun must be infinitely distant and the world must be flat. There's a competing theory that the world's surface is concave which could indeed produce that uniform angle to a finite-distance sun--but only at noon--which may explain some regions where it's always noon. _________*for those regions using standard day-night cycles. 1 3 Link to comment Share on other sites More sharing options...
Callum Meriman Posted July 23, 2018 Share Posted July 23, 2018 (edited) Concave earther! You heretic Qie! Edited July 23, 2018 by Callum Meriman 3 1 Link to comment Share on other sites More sharing options...
Callum Meriman Posted July 23, 2018 Share Posted July 23, 2018 (edited) 51 minutes ago, Phorumities said: Why is it that the SL moon moves thru the night sky but the stars remain stationary? Why is the moon always full? And why can't we see the disk of the SL sun instead of some indiscrete blob of light? 1. 2 spheres, only the inner one, the one with the moon has an llTargetOmega() on it. 2. Because its painted on the inner sphere. 3. Emmissive alpha, and with the glow set to 1.0 (the Linden Gods didn't use full bright). Edited July 23, 2018 by Callum Meriman 1 Link to comment Share on other sites More sharing options...
Derekmate Posted July 23, 2018 Share Posted July 23, 2018 17 minutes ago, Qie Niangao said: At any instant, llGetSunDirection() is the same across the grid* so the sun must be infinitely distant and the world must be flat. There's a competing theory that the world's surface is concave which could indeed produce that uniform angle to a finite-distance sun--but only at noon--which may explain some regions where it's always noon. _________*for those regions using standard day-night cycles. if it concave why I can't see austraila? From my kitchen window? 1 Link to comment Share on other sites More sharing options...
Callum Meriman Posted July 23, 2018 Share Posted July 23, 2018 2 minutes ago, Derekmate said: if it concave why I can't see austraila? From my kitchen window? Sarah Palin can. 3 Link to comment Share on other sites More sharing options...
Phorumities Posted July 23, 2018 Share Posted July 23, 2018 Actually the sl earth is round. One day I was bored so I scrolled the map west from Zindra, past the continents, past the vast estates, past the last lonely sim islands, and then across a vast void of empty sea. Then all of a sudden a continent came into view. It was Zindra, I had scrolled all the way around the world and come back to the easternmost land. Then i thought i'd try the same thing, going south, and after a few hours, lo and behold, i was back at Zindra. So you see, the sl earth is round. 1 Link to comment Share on other sites More sharing options...
Phorumities Posted July 23, 2018 Share Posted July 23, 2018 23 minutes ago, Callum Meriman said: Sarah Palin can. Sarah Palin was trashed by the media and the women's rights movement because she wasn't the "correct" kind of woman. She was a republican, hence a traitor to her sex. It's the same with blacks, if they are republican, they are attacked as race traitors. 1 Link to comment Share on other sites More sharing options...
Nostoll Posted July 23, 2018 Share Posted July 23, 2018 4 1 Link to comment Share on other sites More sharing options...
Coby Foden Posted July 23, 2018 Share Posted July 23, 2018 11 minutes ago, Nostoll said: Erm... because... the stars are not like that. Link to comment Share on other sites More sharing options...
ellestones Posted July 23, 2018 Author Share Posted July 23, 2018 suppose we go with the idea that the SL sun revolves around the SL world. Further suppose that the SL map is flat but the SL world is a cylinder apply this to Earth and Sol (sun chariot). Sol whizzes round the Earth in 1440 minutes. Sol is 149.6 million kms from Earth. Distance travelled by Sol in 1 orbit is about 940 million kms 940,000,000 divided by 1440 is approx. 652,800 kms a minute. brrrm! SL sun whizzes around in 240 minutes so the question. If the speed of SL sun is the same as Sol then how far away is SL sun to get around in 240 minutes ? 240 * 652,800 = 156,672,000 orbit circumference. Radius: 24.9 million kms approx., distance to SL sun is a tiny bit out if we factor in the diameter of the cylinders, but is close enough unless I can't count again and Nova goes erm! 1 Link to comment Share on other sites More sharing options...
ellestones Posted July 23, 2018 Author Share Posted July 23, 2018 (edited) 43 minutes ago, Phorumities said: One day I was bored so I scrolled the map west from Zindra, past the continents, past the vast estates, past the last lonely sim islands, and then across a vast void of empty sea. Then all of a sudden a continent came into view. It was Zindra, I had scrolled all the way around the world and come back to the easternmost land. Then i thought i'd try the same thing, going south, and after a few hours, lo and behold, i was back at Zindra. i never knew that happened with the SL map. Thats pretty interesting if the SL world followed this then its shape would be a torus. Even more interesting! when so then Qie's theory of the SL sun being at an infinite distance begins to hold up Edited July 23, 2018 by ellestones begins Link to comment Share on other sites More sharing options...
ellestones Posted July 23, 2018 Author Share Posted July 23, 2018 altho thinking more about the torus shape there could be 2 suns. 1 outside the torus, and 1 inside. And in the centre of the torus hole would be a secret planet. Ooo! 2 Link to comment Share on other sites More sharing options...
Love Zhaoying Posted July 23, 2018 Share Posted July 23, 2018 Ask Icarus.. 1 1 Link to comment Share on other sites More sharing options...
ellestones Posted July 23, 2018 Author Share Posted July 23, 2018 (edited) thinking about it even more the SL world is a twisted torus, shaped so that the surface area is 512kms by 512kms, assuming positive numbers 1 to 2000 and a scale of 1:256 meters with 1000/1000 being at the centre when the surface is flattened when so then the SL sun is a ring threaded by the torus. A ring sun which only shines inwards i think edit add: yes this works the speed at which the ring sun travels is 512 km divided by 240 minutes. 2.13 kms a minute edit more tying this with Qie's theory that the SL sun is infinite and we apply this to the visual disk in the SL sky then in the field of real numbers the positions of the disk on the inside of the ring are infinite. Where ever we stand on the surface of the world the sun disk is always in the same position relative to where we are Edited July 23, 2018 by ellestones Link to comment Share on other sites More sharing options...
Phorumities Posted July 23, 2018 Share Posted July 23, 2018 1 hour ago, ellestones said: altho thinking more about the torus shape there could be 2 suns. 1 outside the torus, and 1 inside. And in the centre of the torus hole would be a secret planet. Ooo! isn't that secret planet called Gor? 1 Link to comment Share on other sites More sharing options...
Callum Meriman Posted July 23, 2018 Share Posted July 23, 2018 1 hour ago, ellestones said: the SL world is a twisted torus, shaped so that the surface area is 512kms by 512kms, assuming positive numbers 1 to 2000 and a scale of 1:256 meters with 1000/1000 being at the centre when the surface is flattened It's an interesting concept! 1 Link to comment Share on other sites More sharing options...
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