Thursday, May 3, 2018

Selected Questions-Answers From All Experts Astronomy Forum (Types Of Solar Time)

Question:  I am thoroughly confused about the different types of solar time including: how time zones work. Greenwich Mean Time. local mean time, apparent solar time. mean solar time etc. Can you explain these, especially the differences, using some examples? - Mystified in Maine


Answer:


A “time zone” is defined by taking the 360 degrees through which Earth rotates in one day, and dividing it by 24, since it requires approximately  24 hours (actually 23 h 56m) to make one revolution. Thus, one standard time zone would be generated via (360 deg/ 24 hr) = 15 deg/h or 15 degrees of longitude per hour - so be 15 degrees of longitude in expanse. Thus, time zones (calibrated per HOUR) were marked out by LONGITUDE differences.

Time zones don’t mean anything until referenced or calibrated to a fixed position-location, and that is the Greenwich Meridian, defined as 0 degrees longitude. All longitudes west of Greenwich mark time earlier – and all longitudes east of Greenwich mark times later. Thus, Berlin will always have a time later than London, and London will have a time later than New Orleans, just as Barbados will always have a time earlier than London and later than Miami.

The time difference is referenced to longitude difference for the central meridians. For example, if London is at approximately 0 degrees longitude, and New Orleans is at 90 degrees west longitude, then New Orleans is earlier than London by (90 deg/ 15 deg/h) = 6 hours. If the time in London is noon local mean time, then it is 6 a.m. in New Orleans.

In order to solve the problem of different local mean times, Greenwich Mean Time or GMT was developed, so people could compare the same clock times around the world. GMT is based on a 24 hour  clock defined at the Greenwich meridian. So, for example, if one is listening to the BBC from New Orleans and the time given is 13h 30 m GMT, then that means it’s 1.30 p.m. LMT in London. Since New Orleans is 6 hours earlier, that means it’s 7.30 a.m. local mean time in New Orleans.


 Thus, knowing GMT, one can always work out the local mean time at one’s location if one knows the longitude difference relative to Greenwich. (Note for the purposes here, I‘m taking London as having the same longitude as Greenwich. It's actually off by a few thousand feet but negligible in terms of computations.)

Apparent solar time, meanwhile, is erratic because it’s based literally on sundial time, and what’s called the equation of time (E.T.) (See Figure 1) :















The equation of time shows the Sun is an unreliable object by which to measure precise time, given the Sun can be "fast" by as much as 18 minutes on a given day (e.g. near Nov. 1st) and "slow" - e.g. lagging by as much as 15 minutes., e.g. in February.  This is why mean solar time was invented. Mean solar time is based on what we call the "mean Sun", a fictitious object which always moves at a uniform rate through the year, i.e. assumes the rate of the Earth's rotation is uniform through the year. (Thus, "Greenwich Mean Time" is based on the measurements of the "mean Sun" at the Greenwich meridian)

A more useful way to appreciate the meaning of apparent solar time is to construct a simple shadow stick such as shown in the diagram below (for March 21st, at Barbados), and using it to make apparent solar time measurements. 


We know that the height (H) of an object placed in  direct sunlight at local noon is related to its minimum shadow length (Ls) by:

tan (a) = H/ Ls

where (a) is the altitude of the Sun. So if H = 100 cm and Ls = 21 cm, then:

tan (a) = 100 cm / 21 cm = 4.76

And a = arc tan (4.76) = 78. o1

In fact, the actual value for Barbados for the given date should have been 77.0 o or the zenith distance of the Sun equal to the latitude  (e.g. 90.0 o  - 77.0 o =  13.0 o  N).  This is the precise measurement that would denote local noon apparent solar time.


 Exact local (solar) mean time for any given longitude is computed via a slight adjustment to standard time. For example, if Barbados actual longitude is 59 degrees 30’ minutes W then the local mean time requires a slight adjustment equal to the time difference corresponding to 30’ of angular difference, e.g. in longitude from the  60o   meridian. Since the meridian referencing Atlantic Standard time (A.S.T.) is 60 deg W and (60 deg W - 59 deg  30’ W) = 30’. This is half of a degree, and we can see then that for every degree of rotation made by the Earth there elapses an equivalent 4 minutes of time. )


Since 15 deg = 60 minutes (1 hour), then 1 degree = 60 mins/15 = 4 minutes. Similarly 30’ corresponds to 2 minutes of time. So if A.S.T. (Atlantic Standard Time) at 60 deg W is 2 p.m. then the local mean time for Barbados’ specific longitude is: 2 p.m. – 2 mins. = 1: 58 p.m. L.M.T. .


Hopefully, these examples will shed light on the different types of solar time.

If These Incels Hate REAL Women So Much Maybe They Need To Get It On With Sex Robots


It turns out that now we know the April 23rd lethal vehicle attack in Toronto,  killing 10, was an act  by a malcontent male -  motivated by reactionary sexual frustration - not Islamic terrorism. 

The entitled little wretch (Alek Minassian) who committed this deed- targeting women - was evidently miffed that Canuck females were denying him their most prized anatomical features - for no good reason. 


Commenting on the violence in Toronto, in which Minassian - a self-identified “incel” (involuntary celibate)-  sought retribution against women -  a libertarian economist (Robin Hanson) offered his proposal: If we are concerned about the just distribution of property and money, why do we assume that the desire for some sort of sexual redistribution is inherently ridiculous?

What the hell does this libbie nitwit mean by "sexual redistribution"?  Well, basically formalizing an entitlement. That is, if rich, able and handsome (or even not so handsome) guys can get sexual favors - congress then maybe it ought to be dispensed to anyone who desires it, even an incel. And to be sure, there are likely many in our society - the severely disabled, mentally incapacitated, or plain born ugly - who fall into the "deprived" category through no fault of their own. So what are they expected to do? Just be satisfied with remaining  frustrated virgins, or involuntary celibates the rest of their lives?  It's a difficult question.

But one thing we can say unreservedly is you don't get to act out and kill people.- namely women- if you don't get any.   This is why the Toronto attack reminded me so much of the similar Santa Barbara mass slaying back in May, 2014.   Recall that Elliot Rodger, 22, was mightily miffed, because he "couldn't get no respect" during his assorted forays onto the UC- Santa Barbara Campus, including the town of Isla Vista. Worse, there were "the blonde girls" who rejected his advances in favor of the "big brutes who walked on the beaches". In his ego-inflated, reptile brain this merited "punishment".  In a blathering 140 page manifesto this little scion of privilege (his father was an assistant director for 'The Hunger Games') wrote:

"All of my suffering on this world has been at the hands of humanity, particularly women. It has made me realize how brutal and twisted humanity is as a species."

He then went on to bawl and whine about how his life "has been a dark story of sadness, anger and hatred. It is a story of war against unjust cruelty."   But if he really wanted to make war against unjust cruelty he could have pulled his head out of his ass and helped feed the homeless, or volunteered his energy for another cause - as opposed to wallowing in self pity.   Instead, he vowed a "day of retribution" writing:

"On the day before the 'day of retribution' I will start the first phase of my vengeance, Silently killing as many people as I can around Isla Vista by luring them into my apartment through trickery and violence."

The little miscreant followed it up by first cowardly knifing his three apartment roommates then going out to open fire on three women near the Alpha Phi sorority house,  killing two of them, and firing on others from inside his BMW. All in all the aggrieved punk left six dead and wounded five others before offing himself. 

Let's get it clear here that if we are going to charge Alek Minassian with "terrorism" we have to do the same for this little white butcher, Elliot Rodger. You don't get to pick terrorists based on ethnicity or race.  But rather than pull out the "terrorist" bogey I prefer to call both entitled, mass killing incels.

Both Rodger and Minassian acted out because each believed he couldn't get the nookie that he swore he deserved. This leaves the question: What is to be done to prevent more of these sexually frustrated mutts crawling out of their woodwork and wreaking havoc?

At university (South Florida) I recall one of the most forlorn, on -campus students, full of endless complaints of sexual frustration, was an achondroplastic dwarf named "Bob".    He would endlessly complain about "not getting any" but failed to realize that "getting some" (in terms of mechanical sexual release) wasn't the same as intimacy. In the end, one can't force intimacy because that depends on the progress of a relationship - it's not simply mechanical release.  

To be sure, "Bob's" chances of getting laid at USF from any coed were next to zero. Ultimately he figured that out and when he finally arrived at his 'Eureka!' moment informed the whole of the ground floor of Beta Dorm: "I got my solution! I'm gonna get a love doll!"

In those days, btw, these were inflatable contraptions that only a truly sex -desperate person would use. Alas, "Bob" fell in that category.  Which brings us to the desperate,  involuntary celibates of today - who while they may suffer no physical deformity - believe they are still entitled to get sex from women on demand. Like Elliot Rodger and Alek Minassian.

Robin Hanson, the  George Mason U. libertarian economist, and noted brilliant weirdo  believes he has an answer based on economics.  He has advanced a concept of sexual "property" rights. The putz actually wrote, comparing the sex-deprived to the low income worker:

"One might plausibly argue that those with much less access to sex suffer to a similar degree as those with low income, and might similarly hope to gain from organizing around this identity, to lobby for redistribution along this axis and to at least implicitly threaten violence if their demands are not met.”

Implicitly threaten violence? Like uh..."Yuh know, dearie, I just laid out a bundle for this dinner tonight and it'd be a pity for you to have a little accident before I take yuh home...unless you know, you give me some....."  Or worse:

"Hey, cutie!  I saw you makin' time with those beach dudes, so how 'bout makin' some special time for me, unless you want to find yourself in some violent mishap?"

Of course, the innate problem with these "advances" is that the target female is expected to forego any choice and instantly kowtow to the would be loverboy to remove his incelism. Again, there is no appreciation of the distinction between sex mechanical release and intimacy or actual bonding. The point being, you cannot force bonding or intimacy. It either comes naturally or not at all.

In other words, Hanson is advocating a coercive "redistribution" of sexual property rights,  in which the choice to be intimate with the sexually impoverished is removed. It is obviously removed if the "lobbying" for sexual favors entails "implicitly threatening violence".  Basically, what one has is a form of coercive,  psychological extortion, and by analogy not too different from a hold up  or mugging in terms of material property rights. (Of course, most libertarians analogize redistributive taxation to "theft" anyway so it isn't peculiar to have a screwball like Hanson propose this baloney to yank liberals' chains!)

But never mind that, what about conflating humans with material property?  It is a strange proposal given libertarians are supposed to be all about choice and liberty. But it leaves open the question: What is to be done for these sexual deprived forlorns?  Well, the easy solution is to let them have access to female sex robots or audio animatronic love dolls.  After all, their main issue is sexual release to relieve frustration, so a sex robot can materially provide that.  Intimacy isn't on the menu, but then it is unlikely most of these incels are ready for that - they just yearn for mechanical release.

Most of these losers  - like Elliot Rodger and the Toronto killer - aren't equipped for the niceties of social -romantic engagement with women anyway, so an artificial female should work just fine.  "Slam bam, thank you  m'am" and done.  Plus, there's no need to threaten any implied violence on an always willing love robot. "She" will always be ready and waiting!

Sex automatons came to the fore in theory eight years ago when Arturo Arsenio, a Ph.D. candidate working in the Humanoid Group of the Artificial Intelligence Lab at MIT, proposed such an entity on a lark.  While an "amorous"  automaton was still a ways off back in 2010,  it's now - thanks to advanced neural network technology- evolved  to the point a real sex robot is feasible  This would basically merge the exterior qualities of the typical, masturbatory "sex doll" with cybernetics to get a smoothly operating audio-animatronic female facsimile.

Let's also be clear all the separate, artificial. parts already exist in a readily purchasable condition, so it was merely a matter of integrating them into one entity - an ambulatory,   sensory responsive female automaton.  Can such an integrated cyber-entity really exist? Of course.! The control of rhythmic motions in the head and other parts is fully feasible now given more advanced quantum dot neural interfaces. . More subtle degrees of motion (not so jerky)  confer the equivalent of a socialization personality. According to Arsenio (back in 2010), though such a robot would not have the capability of facial expressions, it would express emotions via its varying postures.  These can presumably include sex position postures.

Any objections? Clearly the Roman Catholics will go ballistic as the Vatican's fossils' will regard it as another category of even more vile "mortal sin" - this time with an artificial female. Artificial contraception is bad enough and deemed "mutual masturbation" but congress with an artificial woman? An atrocity! Violating natural law on two levels!

But it certainly beats Prof. Hanson's call for sexual "property rights" distributed to the less dsirable male sector of incels, elder virgins etc. - who detest their celibate state.

Also we wouldn't see any such  representative response as from from Slate’s Jordan Weissmann who - on learning of Hanson's libertarin piffle wrote: , “Is Robin Hanson the Creepiest Economist in America?”, citing the libbie's off the wall post along with some previous creepy forays to dismiss Hanson as a misogynist weirdo .

Indeed, he is that. If he's serious  that fornication rights be accorded to any male who wants them and is prepared to "threaten implicit violence" to get them. . Sorry, it doesn't work that way. No matter how hard up a guy is,  even if he's a virgin at the age of 48,  he has no innate right to just grab sex from another human. But there is an alternative: let him have his way with robot females.  Besides they'll never get jealous if he goes to a different robot female.

See also:

http://www.smirkingchimp.com/thread/jill-richardson/78982/want-to-attract-women-try-not-hating-us

Excerpt:

"The recent attack in Toronto by a man who identifies as an “incel” has called attention to the disturbing and flourishing online incel community. “Incel” stands for “involuntarily celibate.”
These are straight men who, frustrated by their lack of romantic success, channel their feelings into hatred of women. Some even resort to violence. In Toronto, that meant striking dozens of people with a van, killing 10.
Others post online about how much they enjoy simply following women around in a threatening way, getting some kicks by scaring them.
I would hazard a guess that many of these guys have been sold an unattainable model of masculinity."

Wednesday, May 2, 2018

The "Population Bomb Is A Dud" ? Don't Believe It!

Once again, we behold that William McGurn of the WSJ still doesn't grasp basic mathematics and the role of over population in degrading the environment and destroying quality of life.

McGurn's latest babble ('The Population Bomb Was A Dud', May 1, p. A13)  misfires on the first count because he appears not to be aware that was not the author's own choice of title. It was actually, 'Population, Resources and the Environment' - much less sexy and eye-catching.   Of course, this is why the publisher insisted on the catchier title.  The second misfire is when McGurn latches onto a defective tract (book) by Julian Lincoln Simon entitled 'The Ultimate Resource' in which the author insists "we live in an epidemic of life" and it's all basically glorious bounty.  Well, I'd sure love this fool to try to prove that to the people clamoring for housing across the nation right now, and often having to spend down to get even a spare bedroom to rent in the metro Denver area,. (The median monthly rent in Denver is now $2100).

McGurn cites a bet that 'Population Bomb' author Paul Ehrlich made with Simon based on commodities and which Ehrlich ultimately lost. The bet was for $1,000 - not a mammoth sum but not unreasonable given the implicit uncertainties. The bet was that the inflation-adjusted prices of five metals (chromium, tin, copper tungsten,  and nickel would rise by 1990 (Ehrlich) or fall (Simon.) Simon ended up winning but that may only have been because of dumb luck in timing and choosing those particular commodities.  (Potable water and arable land would have been better choices given both are in precipitous decline.)

Ehrlich was right in one sense: the population continued to soar from 4.5 billion in 1980 to 5.3 billion in 1990. More importantly, a 2014  paper by David S, Jacks ('Front Boom to Bust:  A Typology of Real Commodity Prices in the Long Run" ) disclosed Ehrlich would have won the bet had the time frame been extended. In summary, the Jacks' paper found that:"Cumulatively, the picture emerging from this exercise is a clear patter of real, rising commodity prices from at least 1950."

Even The Economist's "free exchange" blog  ca. 2014,  pointed out that while Simon may have won the specific bet, the Cornucopians haven't yet proven their position is correct. The blog pointed out:

"The  (Jacks) paper does suggest that while innovation, substitution and conservation can reduce the price impact of rising demand for fundamentally scarce resources, they can't necessarily eliminate it entirely ."

Further (ibid.):

"Of course, rising demand itself might come to an eventual end given new technologies - or to validate Mr. Ehrlich - the ultimate decline and stabilization of the global population. It may still be too early to tell whether humanity faces Malthusian limits or not."


I am inclined to concur with this - especially in terms of limits to fresh water access, already a problem in many countries. (Look for example at Capetown, S. Africa, narrowly avoiding "Day Zero" but at the cost of 40 percent of the country's water intensive crops.)  Without fresh water resources, the whole 'enchilada' goes south, from crops to public health.  It's a no brainer, given we are seeing the exhaustion of stores of fresh water globally..  One notable ‘State of the World’ report (2000, pp. 46-47), warned that the ever increasing water deficits will likely spark “water wars” by 2025.  Even now, 1 billion-plus  people live in water-stressed conditions, meaning that renewable water supplies have dropped below 1,700 cubic meters per capita, a critical survival threshold. As observed (p. 47):

“When a country’s renewable water supplies drop below 1,700 cubic meters per capita (what some analysts call the water stress level) it becomes difficult for the country to mobilize enough water to satisfy all the food, household, and industrial needs of its population.”

Anyway, McGurn swallows Simon's codswallop hook, line and sinker that "human beings are more than just mouths to feed"  (Really? Tell that to the underfed billions in  sub-Sahara Africa, India).  He also insists - on the basis of Simon's garbage -- that  "Paul Ehrlich got it wrong because he never understood human potential", adding:

"Fifty years out, alas, Mr. Ehrlich remains as impervious to the evidence as ever. In an interview two months ago in the Guardian, Mr. Ehrlich decreed the collapse of civilization a 'near certainty' in the next few decades."

But in truth it is Neoliberal, market -worshipping Cornucopians like McGurn who are impervious to the evidence. That is, that a finite planet simply cannot support an ever expanding population that consumes more resources in one year than the planet is able to provide. McGurn, for example, questions that carrying capacity is "settled science".  In fact, it comes closest to a sensible form for quantifying the human imposition on planetary resources in terms of conserving them for future generations. It is defined:

Carrying capacity =

(usable land-water resource base providing water + food + fuel) / (individual food, fuel + water requirement)

If the numerator is » 11.4 x 10 9  hectares of usable aggregate equivalent land-water resource base and if 6 hectares is the ideal "mean individual requirement" over a lifetime (e.g. meet all basic needs and have a few private luxuries) , that means:

CC = (11.4 x 10 9   hectares) / 6 hectares/person » 2 billion

Obviously, this can be increased if the numerator can be increased or the denominator (each individual's ecological footprint) decreased. The problem is how to achieve it? (Especially if the total population continues to increase at 2-3% per year)

This is why McGurn and his ilk don't get it,  as when he asserts: 'It is rooted in an absurdity that when a calf is born a country's wealth increases, but when a baby is born it goes down." Well, because the calf is a net asset which adds to wealth via its usage (and temporary lifetime)  for providing nutrition etc. A baby on the other hand becomes a net consumer  - draining the planet's resources and imposing an ecological footprint of hectares- from the time it's born. (Unless humans descend to eating babies as in the dystopian scifi film, 'The Road')

The point is we're rapidly approaching the threshold at which there will simply be too many people to feed given existing resources: water, arable soil, fertilizers etc.. The projections now are for at least 10 billion people by 2050, and an 80 percent probability of 12.3 billion on Earth by 2100. Simply put, there simply aren't the resources to support even the lower addition. At root, the issue is sustainability - especially for water which is needed for crops. NO water, no crops to feed a growing population. The graphic below puts this into perspective;                                               

The interpretation of the graph (upward) is straightforward. By June, 2030 TWO full Earths - that is the resources therein - will be needed to support the then population. Already we are at 1.5 Earths. Every year Global Footprint Network raises awareness about global ecological overshoot with its Earth Overshoot Day campaign. Earth Overshoot Day is the day on the calendar when humanity has used up the resources that it takes the planet the full year to regenerate.

The most damning indictment of McGurn comes from his own pen, as when he writes  - in seeming delirium:

"It turns out hell isn't other people after all. To the contrary, human beings constantly find new and creative ways to take from the earth, increase the bounty for everyone and expand the seats at the table of plenty."

But this is precisely where he surrenders to a kind of "perpetual motion" machine delusion. Just as perpetual motion machines are impossible because entropy eventually has the final say, and energy -motion ultimately dwindles to near nothing, so also with "taking from the earth".  The reason is that each "taking" is accompanied by less and less useful energy or what we call net energy. In effect, we need more and more higher quality energy to keep extracting more coal, or oil, or natural gas or whatever - and have ever less left-  less environmental quality with each taking and less quality energy (e.g. higher energy return on energy invested, or EROEI)  to use for anything else.

McGurn also doesn't get that the ongoing loss of resources via his takings can be quantified. For example:

-  Every day humans permanently remove 3.2 billion gallons more water from aquifers than nature can replace. If McGurn's "human ingenuity" was as great as advertised it would be able to compensate for the losses nature is unable to. But it can't!

- U.S. consumption of energy grows every day despite efforts to conserve it.  This is important because each energy use is accompanied by entropy or degradation in the quality of energy remaining  which also impacts our environment.

- To accommodate growth we pave over an area equal to the state of Delaware every year.

Common sense ought to inform one that this is unsustainable and can't go on indefinitely.

The Cornucopians get it wrong because they don't see population growth for the toxin it is, and can't put 2 plus 2 together to see how it leads to the Malthusian nightmare.  All of this comes back to net energy which is that energy humans need to survive. If the oil taken from the ground, say by fracking, only has a ratio of 1:1 (for energy produced to energy consumed) then it is barely of use to extract it. The same amount of oil-energy you are using up to get it, is basically what it carries. There is no net gain.

To fix ideas, the net energy equation in the case of oil  (cf. Physics Today, Weisz, July 2004, p. 51) has been given as:

Q (net) = Q (PR) – [Q (op) + E/T]

In effect, for break-even oil one would find Q(net) = 0

Thus, there is no net gain in energy given the quantity that must be used to obtain it. For the last 700 billion barrels of available oil , i.e.from the original 3,000 billion - of which 1,500 b have been consumed:  Q(net) = negative quantity = -Q  (Currently we are working our way through 1,000 b barrels of "break even" oil)

It's crucial to note the rate of energy production (Q (PR) must be debited by the energy consumed for its operation Q(op), and the energy E invested during its “lifetime” Thus its Q(PR) will be small in relation to the bracketed quantity.Thus, the problem in a nutshell is not “running out of oil"  but running out of CHEAP oil.  When oil prices go up radically that's a sign of running out of break even oil.

It is the net gain that has allowed humans to reproduce and cover the globe. It is the reduction in net gain and eventually a negative energy (- Q (net)) balance that will eliminate a majority of  humans. THIS is what Ehrlich was referring to when he predicted the "collapse of civilization" within a few decades.If you need to envision what that will look like, well nothing too dramatic  - just picture a Puerto Rico after Hurricane Maria where the electricity and water never come back on. And extend that picture globally.  There! Now you have it!  Does McGurn? I doubt he ever will as he's committed to Neoliberal ideology that markets will always solve the day combined with much touted human "ingenuity". (Which can't seem to take without replacing the same, and without entropic cost.)

Every current major societal, environmental problem:  from clogged highways, to overflowing hospital ERs,  to over-crowded schools, as well as scarcity of commodities (reflected in their much increased prices) to fouling of our water and atmosphere and the greenhouse effect, can be laid at the feet of too many people on this planet - each needing food, air, water and energy from the time  born.  The more people generated the more CO2 produced as a result of their gobbling resources and assorted carbon footprints. While the latter are greatest in the West, because our societies are based on consumption, the lesser footprints also matter in the sense that wars, tribal unrest and religious wars can result in millions fleeing their home nations and disrupting the balance of life in those countries to which they flee .

The capitalist's favorite barometer, the GDP, needs to be replaced by the sustainability index of Herman Daly. Only in that way will be able to see how much real wealth we have left, and how much has been consumed by a reckless, wretched system designed to pillage the planet to enrich the very few.

Isaac Asimov in one of his early essays (in his anthology ‘The Stars in Their Courses’) on population and carrying capacity, put it bluntly:

“Humans have a simple choice: they can either decrease their numbers on their own to live within the Earth’s carrying capacity or they can let nature do it for them”.

It's past time Bill McGurn stopped deluding his readers with ecological fairy stories and for once told the truth about the actual, precarious position humans are in. That the way the reckless consumption of  resources is going,  there will be little or nothing left for future generations.

Tuesday, May 1, 2018

Why The Aurora One Station ("Space Hotel" ) Is More A Pipedream Than Practical Plan

No automatic alt text available.
Artist's conception of the Aurora Space Station ("Hotel") billed as "the first luxury hotel in space."

I used to think that "Mars One" was the dumbest space concept to ever emerge. For reference, this was the brainchild of commercial space fantasist  and Mars One CEO Bas Lansdorp,  who imagined sending ten billionaires to the Red Planet at a price of $10b each. No thought of the 563 million km, 250-odd day trip exacting a radiation exposure of 0.60- 0.80 Sievert (Sv). This compared to the NASA lifetime limits of 0.6- 1.2 Sv.

NO special training, or at least not too tasking, just enough to teach  the 10 super rich guys how to use the special on board meal packets - so they don't end up eating each other before getting radiation sickness.

Then there was the “Inspiration Mars” nonsense  which would dispatch a couple (husband and wife)  150 million miles and take 501 days overall to do a brief Mars "flyby".   In other words,  enduring 500 -plus days of being cooped up in a large closet-sized space for a reward of only about an hour of actually seeing the Red Planet, and that from a spacecraft a hundred miles up.   This was the vision of  multi-millionaire investment consultant Dennis Tito (The first ever space tourist, i.e. aboard a Russian Soyuz craft). 

Now, we behold the next loopy iteration in the Aurora One Station or "Space Hotel" as it's been called, to be engineered by Houston-based Orion Span. They plan to launch this "modular" station in 2021 and welcome its first guests the following year. (Well, they have to make sure it's orbit worthy first, and doesn't suddenly crash or go into a rapidly decaying orbit.)

The hotel platform will - if all goes right - orbit 200 miles above the Earth and offer its six guests (at $9.5 million per person)  a grand total of "384 sunrises and sunsets" as the craft orbits the planet for 12 days.  Oh yeah, two specially trained crew members will accompany the space tourists, to hopefully bail the modular station out of any difficulties - say a shortage of space rations or a misfiring toilet.

According to Orion Span's founder, Frank Bunger,  a former software engineer, quoted in Bloomberg News:

"We want to get people into space because it's the final frontier for our civilization. We're not selling a 'hey let's go to the beach' equivalent in space. We're selling the experience of being an astronaut. You reckon that there are people who are willing to pay to have that experience."

And the $64 question then becomes: Are these presumed space touristas prepared for space sickness?  Will they take Gravol with them - in liquid mush form?   Are they going to be able to psychologically handle being cooped up with 5 strangers in a 35'  by  14' cabin - about the size of a large living room in a regular home?  We don't know. All we do know is that the likely space tourists are enamored of the idea of being in space and seeing a bunch of sunrises, sunsets.

Then there is the matter of money, funding to support the first Aurora One space hotel expedition.  Given a 12-day sojourn and the need for enough supplies, as well as redundancy built into the craft (for safety) let's be clear that a price of $9.5 million per person will barely pay for the raw materials for module construction.    Based on past space ventures, a decent estimate when all is said and done, is roughly $200 b for the first tourist expedition. 

Furthermore (ibid.) "Orion Span has yet to contact a launch provider, either for its initial flights, i..e. to build the actual station, or for customer flights."    You may be sure that when Orion Span does finally contact a launch provider, that outfit will want a hefty cut for supplying the rockets, etc. 

Indeed, in the words of Phil Larson, who worked with Elon Musk's Space X, quoted in the WSJ piece:

"The startup's aggressive four year time frame may be a ploy to assess what kind of market may be out there for this."

But let's be clear that a ploy isn't a real plan. It is basically a PR gimmick to try to test the waters to find out how much support there is - among launch "providers" especially - to cooperate in such an "entertainment"  venture.   My bet is there aren't very many who will sign on unless Orion Span can show the demand (from very rich millionaires or billionaires)  is there on  continuing basis.   When one thinks about it, as opposed to guzzling PR, it is basically a dumb idea to send 4 wealthy tourists into orbit for 12 days just to take perspective views of sunrises, sunsets. (I suspect any of these wealthy space travelers to be will also check with an actuary as to the odds of surviving such a space junket. It may also get them to rethink their estate plans!)

Van Espahbodi,  managing director of Starburst Accelerator LLC, also referenced in the piece, suggests "the public relations push behind Orion Span may be an effective way to help the company attract funding."

Maybe, and that also will indicate how many launch providers really believe in an inherently dumb idea,  to the point of adequately funding it, providing launch vehicles.