(Roughly) Daily

“The Bible shows the way to go to heaven, not the way the heavens go”*…

 

cellarius-seasons-banner-1024x689

 

Harmonia Macrocosmica (1660), an atlas of the stars from the Dutch Golden Age of cartography, maps the structure of the heavens in twenty-nine extraordinary double-folio spreads. We are presented with the motions of the celestial bodies, the stellar constellations of the northern hemisphere, the old geocentric universe of Ptolemy, the newish heliocentric one of Copernicus [as above], and Tycho Brahe’s eccentric combination of the two — in which the Moon orbits the Earth, and the planets orbit the Sun, but the Sun still orbits the Earth. The marginal area of each brightly coloured map is a hive of activity: astronomers bent over charts debate their findings, eager youngsters direct their quadrants skywards, and cherubs fly about with pet birds in tow…

northern stars

The Northern Stellar Hemisphere of Antiquity

More marvelous maps of the heavens at “The Celestial Atlas of Andreas Cellarius (1660)

* Galileo (quoting a librarian at the Vatican)

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As we look to the stars, we might recall that it was on this date in 1843 that Sir William Rowan Hamilton conceived the theory of quaternions.  A physicist, astronomer, and mathematician who made important contributions to classical mechanics, optics, and algebra, he had been working since the late 1830s on the basic principles of algebra, resulting in a theory of conjugate functions, or algebraic couples, in which complex numbers are expressed as ordered pairs of real numbers.  But he hadn’t succeeded in developing a theory of triplets that could be applied to three-dimensional geometric problems.  Walking with his wife along the Royal Canal in Dublin, Hamilton realized that the theory should involve quadruplets, not triplets– at which point he stopped to carve carve the underlying equations in a nearby bridge lest he forget them.

 source

 

Written by LW

October 16, 2018 at 1:01 am

“And so the Universe ended”*…

 

implosion

Conceptual illustration of the Higgs Field that physicists believe permeates the Universe, and that could theoretically bring about its end.

 

Every once in a while, physicists come up with a new way to destroy the Universe. There’s the Big Rip (a rending of spacetime), the Heat Death (expansion to a cold and empty Universe), and the Big Crunch (the reversal of cosmic expansion). My favourite, though, has always been vacuum decay. It’s a quick, clean and efficient way of wiping out the Universe…

Learn more about a possibility that really sucks: “Vacuum decay: the ultimate catastrophe.”

* Douglas Adams, The Restaurant at the End of the Universe

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As we we abhor a vacuum even more than nature does, we might send closely-observed birthday greetings to Jesse Leonard Greenstein; he was born on this date in 1909.  An astronomer who ran Cal Tech’s storied program for decades, he co-discovered (with Maarten Schmidt) the quasar.  While other astronomers had previously observed the bright bodies, Greenstein and Schmidt were the first to to interpret the red shift of quasars and correctly identify them as compact, very distant– and thus very old– objects.  Later, working with Louis Henyey, Greenstein designed and built a new spectrograph and wide-view camera to improve astronomical observations,

greenstein source

 

Written by LW

October 15, 2018 at 1:01 am

“It is hard enough to remember my opinions, without also remembering my reasons for them!”*…

 

philosophy

 

This is my summary of the history of (Western) philosophy showing the positive/negative connections between some of the key ideas/arguments of the philosophers. It’s a never-ending work-in-progress and the current version is mainly based on Bryan Magee’s The Story of Philosophy and Thomas Baldwin’s Contemporary Philosophy, with many other references for specific philosophers/arguments. (The source is noted with the book icon that appears when you click on an argument.)…

From Deniz Cem Önduygu, a fascinating interactive tool for exploring the development of Western philosophy: “The history of philosophy, summarized and visualized.”  [TotH to friend MK]

For a different (but also engaging) visualization of some of this same history, see “The Structure of Recent Philosophy.”

* Friedrich Nietzsche

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As we investigate influence, we might send deeply-thoughtful birthday greetings to Hannah Arendt; she was born on this date in 1906.  Though often categorized as a philosopher, she self-identified as a political theorist, arguing that philosophy deals with “man in the singular,” while her work centers on the fact that “men, not Man, live on the earth and inhabit the world.”  One of the seminal political thinkers of the twentieth century, the power and originality of her thinking was evident in works such as The Origins of Totalitarianism, The Human Condition, On Revolution and The Life of the Mind.  Her famous New Yorker essay and later book, Eichmann in Jerusalem: A Report on the Banality of Evil— in which she raised the question of whether evil is radical or simply a function of thoughtlessness, a tendency of ordinary people to obey orders and conform to mass opinion without a critical evaluation of the consequences of their actions and inaction– was controversial as it was widely misunderstood as defending Eichmann and blaming Jewish leaders for the Holocaust.  That book ended:

Just as you [Eichmann] supported and carried out a policy of not wanting to share the earth with the Jewish people and the people of a number of other nations—as though you and your superiors had any right to determine who should and who should not inhabit the world—we find that no one, that is, no member of the human race, can be expected to want to share the earth with you. This is the reason, and the only reason, you must hang.

 source

 

Written by LW

October 14, 2018 at 1:01 am

“If you think this Universe is bad, you should see some of the others”*…

 

copernicus

FIRST OF FOUR?: The first Copernican revolution moved the Earth out of the center of the solar system. The second recognized that there are many planets in our galaxy, and the third that there are many galaxies in the observable universe. Proving that our universe is one among many would represent a fourth Copernican revolution.

 

A challenge for 21st-century physics is to answer two questions. First, are there many “big bangs” rather than just one? Second—and this is even more interesting—if there are many, are they all governed by the same physics?

If we’re in a multiverse, it would imply a fourth and grandest Copernican revolution; we’ve had the Copernican revolution itself, then the realization that there are billions of planetary systems in our galaxy; then that there are billions of galaxies in our observable universe. But now that’s not all. The entire panorama that astronomers can observe could be a tiny part of the aftermath of “our” big bang, which is itself just one bang among a perhaps infinite ensemble.

At first sight, the concept of parallel universes might seem too arcane to have any practical impact. But it may (in one of its variants) actually offer the prospect of an entirely new kind of computer: the quantum computer, which can transcend the limits of even the fastest digital processor by, in effect, sharing the computational burden among a near infinity of parallel universes…

Cambridge physicist and Astronomer Royal Martin Rees suspects that our universe is one island in an archipelago: “The Fourth Copernican Revolution.”

* Philip K. Dick

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As we find our place, we might recall that it was on this date in 1884 that 41 delegates from 25 nations, meeting in Washington, DC for the International Meridian Conference, adopted Greenwich as the universal meridian.  They also established that all longitude would be calculated both east and west from this meridian up to 180°.

PrimeMeridianThm source

 

Written by LW

October 13, 2018 at 1:01 am

“Things on the whole are much faster in America; people don’t ‘stand for election’, they ‘run for office.'”*…

 

density

If you want to find a Republican member of Congress, head out into the country. To find a Democrat, your best shot is in a city. But to find a competitive election this fall? Head to the suburbs, where control of the House of Representatives will likely be decided.

More than 40 percent of the U.S. House of Representatives is composed of predominantly suburban districts, according to a new CityLab analysis that classifies all 435 U.S. House districts according to their densities. These seats are currently closely divided between Democrats and Republicans. But that balance could be washed away by a “blue wave” in November. There are 28 Republican-held suburban districts that are competitive1 this fall under FiveThirtyEight’s projections—close to 40 percent of Republicans’ 74 suburban seats. The number of suburban Democratic seats in play: 1 out of 90…

The fascinating analysis in full at: “Density is Destiny.”

* Jessica Mitford

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As we get out the vote, we might note that today is International Moment of Frustration Scream Day– one is encouraged to go outside at twelve hundred hours Greenwich Mean Time and scream for a solid thirty seconds.  The occasion was created by Ruth and Tom Roy, who have a long suit in this sort of thing.

scream_21 source

 

“I’ve never seen contraptions with so many dials and knobs before”*…

 

control panels

Control room, Klingenberg Power Station, Berlin, 1928. Photos by E.O. Hoppé.

 

Just one selection from the plethora of “dials, toggles, buttons, and bulbs” at “Control Panel.”

* “Lampy,” in The Brave Little Toaster

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As we twist and turn, we might spare a thought for Guillaume Amontons; he died on this date in 1705.  A physicist who made formative contributions to the understanding of friction, he was also an accomplished designer of scientific instruments– perhaps most notably, the air thermometer, which relies on increase in volume of a gas (rather than a liquid) with temperature.  His approach led to the emergence of the concept of “absolute zero.”

amonton thermometer source

Amontons source

 

Written by LW

October 10, 2018 at 10:01 pm

“The boundaries which divide Life from Death are at best shadowy and vague”*…

 

resuscitation-London-Humane-Society_Wellcome

 

In the late 18th and early 19th centuries, people worried about the difficulty in measuring the line between life and death. Fearful that loved ones would be buried alive, people attached strings and bells to a finger of a person who appeared dead, so that they could detect any movement and commence or continue resuscitation.

There were also societies dedicated to the resuscitation of people who appeared to be dead, for example, the Institution of the Humane Society of the Commonwealth of Massachusetts (Humane Society) founded in 1788 and modeled after the Royal Humane Society of London founded in 1774. The Humane Society’s main purpose was to revive those apparently dead. In Boston and along the coastline, their concern lay first and foremost with the drowned. The London Society’s founders claimed that it had been successful in reviving 790 out of 1300 people “apparently dead from drowning.” The men who brought the Institution to Massachusetts hoped to replicate this effort, restoring loved ones to their friends and family members…

Early attempts to find the line between life and death: “Who is dead?

* Edgar Allan Poe, “The Premature Burial”

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As we take our pulses, we might spare a thought for Sir Richard Blackmore; he died on this date in 1729.  A physician of note, he argued that observation and the physician’s experience should take precedence over any Aristotelian ideals or hypothetical laws, and he rejected Galen’s humour theory. He wrote on plague, smallpox, and consumption.

But he is best remembered for his passion, poetry.  A supporter of the Glorious Revolution, he wrote Prince Arthur, an Heroick Poem in X Books, a celebration of William III.  Later he authored Blackmore produced The Nature of Man, a physiological/theological poem on climate and character (featuring the English climate as the best), and Creation: A Philosophical Poem.

While he was praised in his time by John Dennis, Joseph Addison, and, later, Samuel Johnson, history’s verdict has been written by his detractors– main among them Jonathan Swift, Alexander Pope, and John Dryden– all of whom found Blackmore’s poetry “grandeloquent,” “stupid,” and “leaden.”

(Readers can judge for themselves at the Internet Archive’s collection of his work.)

440px-Richard_Blackmore source

 

Written by LW

October 9, 2018 at 10:01 pm

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