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The Nacreous Oughts

07 December 2014

the story of ziryroi 

Ziryroi on the Wiki (2002). "I had been writing in Lojban from the start. At the same time, every year during the Dog Days, i only wrote in Esperanto. This year i wanted to only write in Lojban, so i could finish a book by Logfest." Of the first edition of 27 copies, 26 were sent to Logfest '91.

1993: The Great Rafsi Shift. "This has the side effect that Lojban written prior to 1993 looks funny to people who are reading it now."

1995: Purple Lojban. "Poet and semi-Lojbanist Michael Helsem created the word zirjbo ('purple Lojban') and it's adjectival counterpart jbozi'u ('lojbanically purple')as intentional malglico puns based on the phrase 'purple prose' Michael has written an immense volume of usually-ungrammatical Lojban poetry and prose to which he applies these terms."

1999: Zirjbo.
Also.

2001Skanunydji.

"Someone who is not a linguistics geek might well ask me, what do i get out of this intense but pointless hobby? Well, at one time i might have answered, it's not often you have a chance to be a tribe's Chaucer & Shakespeare at once... Now i think it has something to do with literalizing the alienation i feel as an author. You don't want to read me? Fine: i'll write something you can't read. --And other times, in a mellower mood, i'll answer: all languages are essentially one language, & our job is to acquire as much of it as possible." --Xvarenah 5/02/03

Sometime around 2005 (?) Dr Llambias recorded himself reading "xagji pemci" & it can be found here.

2008: Ziryroi?

2014: A Name for the Fourth Moon of Pluto. "He wasn’t the same anymore. Neither was the language."

Ziryroi uploaded to Pearltrees.

"We do not think very many people will learn lojban but for those with a taste for this sort of thing, it seems to us far better (“better” is a metaphysical statement, as Chesterton would agree) than chess, more edifying than anagrams, and more within the common range of ability than number theory." --Max Arnott

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08 September 2014

cabna rafydri binxo 

2. zo roi se basti zo ro'i

4.5 zo ro'i se basti zo toi
4.23 zo ger se basti zo gen

6. lu skadji li'u se basti lu skanunydji li'u
6.2 zo kaz se basti zo kam

8. lu firgau li'u se basti lu pu'u firgau li'u
8.1 zo ci'o se basti zo cni
8.5 lu nundji li'u se basti lu nunydji li'u
8.11 zo vli se basti zo vil

9.2, 5, 7, 8, 9 zo kaz se basti zo kam

11.5 zo bat se basti zo bar

12.2 zo taj se basti zo rai

13.7 zo dan se basti zo dar

15.3 zo ram se basti zo pam
15.3 zo ci'o se basti zo cni

16.6 zo ci'o se basti zo cni
16.16 lu skavisydji li'u se basti lu skavisnunydji li'u

17.1 zo kef se basti zo ref

18. zo xagji se basti lu nunxagji li'u

19.3 zo raj se basti zo ra'i
19.5 zo zad se basti zo zma
19.10 lu djiselcinmo li'u se basti lu nunydji selcni li'u
19.11 zo sei se basti zo se'i

20. zo roi se basti zo ro'i
20.1 zo sri se basti zo lis
20.5 lu zbasynundji li'u se basti lu zbasynunydji li'u

21.3 lu falte'a li'u se basti lu nu falte'a li'u
21.4 lu loi tarci xagji li'u se basti lu loinu tarci xagji li'u
21.5 lu sevzgi li'u se basti lu zgiselsne li'u

22.7 zo jan se basti zo jga

23.1 zo taj se basti zo rai

24.5 zo roi se basti zo ro'i

26.7 zo kaz se basti zo kam

27.3 zo jga se basti zo ja'u
27.7 zo cfi se basti zo fik
27.7 zo roi se basti zo ro'i
27.12 zo kaz se basti zo kam

28.18 zo bad se basti zo bra

29. zo sau se basti zo sas
29.4 zo kas se basti zo kan
29.7 zo kaz se basti zo kam

31. zo kaz se basti zo kam
31. zo bad se basti zo bra
31.6 zo tco se basti zo dot
31.11 zo tur se basti zo tut

32.9 zo beg selsre je se basti zo bog

34.3 zo nu'a se basti zo nuzba
34.8 zo bei se basti zo be'i
34.13 zo xra se basti zo xai

35.2 zo bad se basti zo bra
35.7 zo cis se basti zo cin
35.7 zo bei se basti zo be'i
35.8 zo moi se basti zo mro
35.10 zo nac se basti zo na'a
35.13 zo bei se basti zo be'i

37. zo sas se basti zo las
37.12 zo sei se basti zo se'i

38.2 zo sai se basti zo sra
38.6 zo kaz se basti zo kam

39. zo dre se basti zo de'u
39.3 zo ram se basti zo pam
39.3 zo ba'i se basti zo balvi

40.6 zo toi se basti lu tongau li'u

41.16 zo bad se basti zo bra
41.23 zo bra se basti zo ca'a

43.2 zo roi se basti zo ro'i
43.12 zo ram se basti zo pam

45. zo mor se basti zo mon

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30 August 2014

"Latin Mass" by Paul Bonneau 

part 1: Kyrie Eleison

part 2: Gloria

part 3: Credo

part 4: Sanctus

part 5: Agnus Deo

Flower Mound Chamber Orchestra, live recording 5/4/2002, Trietsch Memorial United Methodist Church.

Parn Michel, soprano; Karen Chraska, mezzo-soprano,; Pam Michel, soprano

From Xvarenah 4/30/2003: "Recently he wrote a Latin Mass for his doctorate, & an amazing piece it is. Usually when later composers try this sort of thing, they end up stylizing a hollow shell. But his is rich in feeling & drama: one movement almost sounds like it has Crime Jazz influences; another is mysteriously anguished. I've already listened to it about ten times, & each time discover new felicities."

27 August 2014

A super-Venus around Groombridge 34 


(via renderosity)

A planet 5 times the mass of the Earth has been discovered in a sub-habitable orbit around the brighter component of the nearby red dwarf binary Groombridge 34. Both components of the system (now known as Gliese 15, or HIP 475) are flare stars (GX And--with a range of perhaps 0.10 mag-- & GQ And). At a separation of 35" & this distance, the semimajor axis works out to be on the order of 146 AU [125 now] with a period of something like 2600 years [2014 if total masses are 0.48]. Nothing is known about the age of the system.

Hipparcos gives the parallax as 0".28027 & using visual magnitudes of 8.09 & 11.06 i get luminosities of 0.006439420308 & 0.0004176829744. The spectral types are variously given as M1e/M2 & M6/M3.5e. The main article uses T= 3567 K (which is K9 in my tables), R= 0.3863 solar, mass= 0.375 (given elsewhere as 0.414 + 0.08--i would say at least 0.40 for the former). Running some numbers from my own temperature & bolometric correction tables, i find a larger radius for anything cooler than M0.25: BC= -1.1775 T= 3387.5 & 0.019047885, with a derived radius of 0.404595231.

The planetary period of 11.4433 days gives a semimajor axis from 0.072 (M= 0.375) through 0.073 [they give 0.074] (M= 0.40) to 0.076 (M= 0.45). That corresponds to a blackbody temperature of 388, 384, or 375 K. For comparison, Venus is only 328. It would be difficult to avoid a runaway greenhouse, especially as the planet is substantially larger than the Earth.

Just how big? One equation i have, suggests that a rocky planet of 5.35 (min.) Earth masses, would have a radius of 1.56--this corresponds to a density of 1.41 & gravity of 2.3. Since the system is metal-poor (log Fe/H= -0.32), the density might well be less; if as little as 0.575, its radius would be 2.10 & its gravity 1.2. [The system being a metal-poor subdwarf, the anomalously high temperature of the primary sun is somewhat explained.] Log M/H (also given in the main paper) is -0.22 for density 0.684 (Mars is 0.71) is probably a more reasonable lower limit; this gives R= 1.985, & G= 1.35.

Undoubtedly the planet has synchronized its rotation. It does not appear to have been used much in science fiction (apart from video games) but it does have a neighbor less than 2 light years away--Ross 248, which Voyager 2 will pass not far from in 40,000 years; & which appeared in reference books since the 60s as possessing a "ghost planet" with a period of 8 years. That one we might as well call "Xzdjyk" (unless you like "Waughtal's Planet"). For Gliese 15 Ab itself, a case can be made for Tiryns...


(via atlas of the universe)

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09 June 2014

Kapteyn's Star 

Story of Kapteyn's Star from Sci-News.com on Vimeo.


Two planets have just been discovered around nearby Kapteyn's Star, an ancient metal-poor subdwarf in the constellation Pictor. With a visual magnitude of 8.853 and a parallax of "0.25566, the luminosity works out to 0.003832431762. Trying to match the radius as given, i figure this MO star with BC -1.0925 and T= 3450 K, for a total brightness of 0.01048273 solar, which gives a radius of 0.289370994.

Using a stellar mass of 0.274, the inner planet whose period is 48.616 days orbits at 0.169318524 AU, and the outer planet, at 121.54 days, would be 0.311887389. (Roughly this represents an orbital resonance of 12 to 5.) The corresponding blackbody temperatures are 217 and 160 K. However, their orbits are rather eccentric (0.21 & 0.23), so these numbers vary from 198 to 245 and 145 to 183. So even the inner planet is rather colder than Earth.

The tidal effect on these planets is 9.5 and 2.8, which leads to the consideration that the inner planet would either be captured, like several other "habitable-zone" exoplanets we have seen, or very long; by a rather complicated rule of thumb I have devised, i find the solar day of these worlds 674 days (22 months) long, and 10 days long, respectively. That would cause extreme temperature variations in the warmer world, moderated of course by the amount of atmosphere it possesses. But we know very little of what to expect with planets of a metal-poor, halo star such as this. One can extrapolate that the absence of heavy elements would result in a less dense planet overall; for instance, with metallicity (log Fe/H -0.86) of 0.138038426, it might be something like a fourth of Earth's. So the inner planet, with 4.8 times Earth's mass, might have a radius of 2.8 and a gravity of 0.63; the outer one, with 7.0 Earth's mass, R= 3.2 and G= 0.71.

If i assume the albedo of each world is 0.4375 and 0.51, and the greenhouse effect 50 and 60, the average temperatures (excluding diurnal variation), amount to -31.5, plus or minus 20.5 (due to orbital eccentricity), and -76 plus or minus 16 C. The outer planet might vary 10 degrees more either way if its solar day is 10, while the inner planet could vary by a hundred degrees more in the daytime, and less at night, with the slowly-rotating model. This is not a mild climate. It might be possible to find an atmospheric pressure such that water does not boil; certainly it would freeze long before sunset... The outer planet seems to be a bit too cold for an ammonia world; perhaps sulfur dioxide might work as a solvent there.

In addition to these changes, the star itself is a BY Draconis variable with a range of 8.90 to 9.22 magnitude; the variation is quasiperiodic, linked to the star's rotation period (195 days).

I am naming planet b Absamon, and planet c Maccasor (both names from the Sworn Book of Honorius). At closest approach (some 0.035 AU) each would show a visible disk, perhaps 1/4th the size of a full Moon as seen from Earth. From Absamon, Maccasor would have a synodic period of 81.0 days--a little less than an eighth of its solar day--but i would expect some kind of synchronization to have occurred.

[A synchronization of exactly 8 to 1 would make the rotation period 46.38 days, for a solar day of 1010 days. (7/14) --It takes 4 days for its sun to clear the horizon.]

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20 May 2014

Cendrillon 


The star now known as GJ 687, but in older lists of nearby stars BD+68°946 (also AOe 17415-6, Vyssotsky 322, & Ci[ncinnati 18h] 2354), in Draco, appears to have a Neptune-sized planet near the outer edge of its habitable zone. I am calling this one Cendrillon, for no very good reason, except that i've been reading multi-cultural versions of this fairy tale in some of my English tutoring. It is one of the closest stars to Earth, a M3.5 dwarf of either 0.21 or 0.413 times the mass of the Sun. At parallax "0.22084 & visual magnitude 9.15, its luminosity is 0.003907010002. For that spectral type, i would expect BC= -1.97, T= 3200 K, M= 0.32 (which gives a radius of 0.5), whereas the temperature given in the first, exoplanet discovery, source as 3413 K, corresponds to M0, BC= -1.12 & 0.50 times the solar mass (R= 0.3). The visual luminosity corresponds to a typical M1 star BC= -1.35 & 3350 K; its mass would be 0.45. They give the radius as 0.4183, & the best fit i can find is BC= -1.645 T= 3295 K (e.g. type M2.25--note that the B-V given as +1.5 in one of the sources is close to M2 standard) which gives a bolometric luminosity of 0.017776429 & a derived radius 0.413111619. (Not a bad fit for the larger mass.) These i will use.

If the stellar mass is 0.413 & the planet's period is 38.14 days, its semi-major axis works out to 0.165134804. The tidal effect is 15.145, so it is definitely trapped rotation. The blackbody temperature is 251 K, not much cooler than Earth's 279 K; trying some combinations of albedo, 0.19-0.36-0.51, with greenhouse effect 20-40-60, give average surface temperatures of -15, -8, -3. In short, this will be more "habitable" at the East Pole than anywhere near the terminator. There's a catch, though. Its mass is given as 18.394; thus there will be a strong tendency to hold molecular hydrogen at these temperatures (e.g. for any planet density greater than 0.336 times the Earth), & i expect this planet to have an ammonia-based biosphere, if any.

In Our Neighbor Stars (2012), Thomas William Hamilton writes: "The mass is 21% of the Sun's mass, but it has a much higher percentage of elements higher than helium than the Sun does [in Wikipedia i find: Fe/H +0.11; here +0.05]. This is generally taken to mean that the star is significantly younger than the Sun. ...It is a prolific producer of X-rays (also suggestive of youthfulness)..." Solstation has: "close binary? LHS 450" but no separate entry. Old books (ca. 1969) cite a dark companion, either 8-26 times the mass of Jupiter (1977), or 10-60. This is clearly another ghost planet, like those of Barnard's Star & 61 Cygni. Long ago i calculated Ci 2354 as a binary (period 26 years) with very high eccentricity (0.90). A separate, Earthlike planet close in is barely possible, but it does experience some wild gyrations of temperature. I wonder if everyone has forgotten this model?


(image via reneaigner on deviant art)

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07 May 2014

A Dissent on Odette 


(via phl dot upr dot edu)

The planet Kepler-186f (in Cygnus, which is why i call it "Odette") is being touted as the latest, most likely Earth-analogue yet discovered. While i like for these exoplanets to capture public attention, albeit ill-informedly (there's already talk of "going there"--as if 3 quadrillion miles were a Sunday drive), i have only just made a few preliminary calculations, without having seen the actual scientific paper.

At 492 light years, it's not in the immediate neighborhood. That makes a parallax of something like ".00662; which with an apparent magnitude 14.625 gives a visual luminosity of 0.028038933 solar. This looks to me like a main sequence star of about K8 spectral type. (We'll come back to that question.) When i plug in K8's 3800 K stellar temperature & the corresponding bolometric correction of -0.91, i get a total luminosity of 0.064827829 solar. However, the radius produced by these numbers is 0.59315683, much different from the 0.472 given by my sources. (They say the temperature is 3788, actually.) For the mass given as 0.478, my models suggest a visual luminosity of only 0.008 solar (with that apparent magnitude, the distance would better be at 263 light years.); that should be type M0.5 with a temperature of 3375 K, BC of -1.235, & derived radius 0.87387727 (total luminosity 0.087555618). I would put the mass at 0.52-0.53 instead.

Let's assume the distance is correct. the visual luminosity suggests type K9 (3600 K) BC -1.01 which gives total luminosity 0.071167878 & stellar radius 0.692457296, which i will provisionally use. We know the planet's rotation period is 129.94598 days. When i calculate the planet's semi-major axis from mass 0.52, i get a= 0.403748549 (they say "0.36-0.41"--good agreement). This works out to a blackbody temperature of 227 K.

Finding out the planet's real temperature from there is a matter of further supposition. If it has the same albedo & greenhouse effect as Earth (A 0.36, G 38 C) the average surface temperature is -32 C. That's between Earth & Mars, as we might expect. Assuming a thicker atmosphere (A 0.4375 G 50, A 0.51 G 60) makes it -26 or -23 C. In other words, we can make it a little warmer, but not a lot.

We know a little more; two things cause a reevaluation, to my mind, of our whole picture of this planet. First, the metallicity (log Fe/H) is given as -0.28, or 52% solar. I have long used a rule of thumb, not based on actual physical processes, but which makes it possible to assign a rocky-planet assumed density per the stellar metals. (A star of lower metallicity might produce less dense planets, all other things being equal.) If i adopt, by my rule, a planetary density of 0.616595001 times Earth's, with the observed radius 1.11 the mass will be only 0.84 & the gravity 0.68. So in effect it's a smaller world... Trying a more realistic A 0.2775, G 30 gives the average temperature of -33 C. This is distinctly "Barsoom-like".

It's being assumed too blithely that the rotation of this planet would be synchronous. But its tidal effect, 3.25, comes between Venus & Mercury, neither of which is captured (--Venus if anything is synched to Earth!); some of my calculations provide a likely rotation period of 1/10th its revolution period e.g. 13 days. So a "day" is a week & a "night" is a week. I estimate, with the lesser atmosphere (the actual amount of water being an extreme unknown factor), the diurnal temperature variation being on the order of 43 C either way, from 10 C to -76 C. In sum, a fairly slow rotator, heavy ice caps north & south, considerable day-to-night temperature extremes, with a big (1.7 solar apparent size) red sun in the sky... Odette.


(via kickass.to)

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(Another formula i found gives, irrespective of stellar (& perhaps planetary) metallicity, the radius of a rocky planet is proportional to its mass by the power of 0.26 or 0.27; the derived mass for Odette becomes 1.482620868; then i get a density of 1.0840796 times Earth's, & gravity 1.203328357. Which means the albedo & greenhouse effect, & thus temperature, might be more like the exact earth analogue mentioned previously. Though the diurnal temperature variation would then be less, than the final number i came up with.)

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