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mindanao_bleeding_heart_dov-600x560.jpgIs there such a thing as a Gothic pigeon?  There are a lot of different breeds of pigeond, however the most Medieval-looking member of the Columbidae family was never shaped by human selection. The Luzon bleeding heart pigeon (Gallicolumba luzonica) is a delicate shy bird which lives in tropical forests of Luzon, the largest island of the Philippines.  The birds eat berries and grubs of the forest floor, which they almost never leave except when they are nesting.  They are a mixture of barred gray above and cream color below, except for their distinguishing feature, which sets them apart from all other birds.

Gallicolombe poignardée Gallicolumba luzonica Luzon Bleeding-heart

Gallicolombe poignardée. Famille des Columbidés. Ordre : Columbiformes

Bleeding heart pigeons have a group of scarlet feathers at the center of their breast which make it look as though they have a terrible bleeding hole in their chest.  In female birds this feature is somewhat subdued, however in males it glows incarnadine like a lurid painting of a Christian martyr.  Male birds even appear to have droplets of blood running down from the terrible heart wound.

heart-jesus7

The first time I encountered this bird was not in a book (or on a random blog written by some weirdo), but in the Bronx zoo.  I saw a glimpse of a male bird at the back of an aviary and I got all afraid that he had been horribly hurt.  Only when I saw the picture on the exhibit were my fears assuaged.  All of this leads up to the question of why these animals look like they have been shot through the heart. There are lots of folklore explanations (of the dogwood religious just-so story variety), but the real answer is that nobody knows. It is a shockingly metal look for such an unassuming and modest bird.

luzon-bleeding-heart-5[6].jpg

Sadly the bleeding heart pigeon is growing scarce as its forest home is cut down and made into plywood. Additionally, people capture and sell the birds into the pet and aviary trade. Like the planet Jupiter, it is valued for its lovely and unnerving red spot. With its mild nature, endangered status, and religious martyr good looks, perhaps the bleeding heart dove is a perfect mascot of the terrible plight of animals in our over-burdened Anthropocene world.

earthcrust01

Have you ever wondered about how deep humankind is capable of digging into the planet? During the Cold War, both the United States and the Soviet Union tried to answer this question with vast drilling projects. These two drilling operations were opposite but strangely complimentary. The United States tried to drill through the oceanic crust to reach the Earth’s mantle through an oceanic tectonic plate (which are much thinner than continental plates, but made of dense basalt). The Soviets attempted to drill through a continental plate–which are massively thick but not nearly as dense as oceanic plates (and not underneath thousands of feet of water!). Each operation failed due to the nature of geophysical reality and to the particular weaknesses of the respective nations. In the United States, the project was abandoned because of a lack of funding caused by congressional intransigence and general scientific apathy. The Soviet project was set aside because society collapsed and the Soviet Union broke apart.

 

The Main Drilling Ship used for the Mohole Project

The Main Drilling Ship used for the Mohole Project

The American project was an outright attempt to drill into the Mohorovičić discontinuity, the line which separates the Earth’s crust from its mantle. The discontinuity is named after a Croatian geophysicist—and the project took its name from him as well when it came to be known as “the Mohole”. Various boreholes were sunk into the oceanic crust off the coast of Guadalupe Island, Mexico. The deepest drill hole reached 183 m (600 feet) below the sea floor—which was already beneath 3,600 meters (11,700 feet) of seawater. Yet the oceanic crust is ten kilometers (6.2 miles) thick, so the project was still far from achieving its goal. The Mohole project was plagued by mismanagement, underfunding, and incongruities between the government, scientific, and private institutions which were working together. Yet it was the first time dynamic positioning technology was used for deep sea drilling—today this technology is critical to offshore oil projects. Additionally scientist learned more about the composition of oceanic plates. Unfortunately the project was canceled in 1967.

The Kola Superdeep Borehole in 2007

The Kola Superdeep Borehole in 2007

The Soviet team began drilling began on 24 May, 1970. They chose to drill on the Kola Peninsula, which juts into the Arctic Circle between the Barents Sea and the White Sea (and is a sort of sinister eastern mirror to the great Scandinavian nations). The Soviet scientists and technicians were trying to drill through the Baltic continental crust which is estimated to be 35 kilometers (22 miles) in thickness. For decades, they worked on this project, sinking new holes as extant drillings became broken, collapsed, or unviable. The deepest they managed to drill was 12,262 metres (40,230 ft)—about a third of the distance through the continental plate. This remains the deepest drill hole in human history–although today there are a few boreholes which are longer than this (however they are not deeper–such super-long drillings are generally horizontal or diagonal for the specialized purposes of oil drilling). The Kola borehole project also produced useful and unexpected results. At the maximum depths which the drill bore reached, temperatures were much higher than expected and there was a great deal more water in the continental rock. The core samples from the drilling reached all the way through Earth’s geological history back to rocks of Archaean age (greater than 2.5 billion years old) although these were distorted by heat and pressure. Additionally the mud which came from the hole was described as boiling with hydrogen. As we dig into the underworld things get stranger and stranger! Sadly, the project was abandoned and the works are now a deserted ruin in the grim chaos of Putin’s Russia.

 

The Kola Superdeep Bore hole mission center in 2012

The Kola Superdeep Bore hole mission center in 2012

A perspicacious reader will note that we never actually got anywhere close to the Earth’s mantle with either of these projects. Geologists, geophysicists, and drilling engineers learned much from the attempts, but the fundamental questions about the Earth’s crust and mantle which lead to the two missions remain unanswered. All we know about the Earth’s mantle comes from the reading of various sorts of waves which pass through the Earth—not from direct observation. The only rocks we have seen from the mantle are strange xenoliths which became caught up in esoteric igneous events and traveled as tiny crystals from the mantle to the surface through volcanoes or basaltic flows. Fortunately the world’s scientists are putting together a new mission–the Integrated Ocean Drilling Program (IODP) to try again to reach the Earth’s mantle by penetrating the oceanic crust. This mission is being organized and funded mostly by the Japanese and the NSF (although there are a number of other contributing members and associate members). The Japanese in particular regard it as their premier scientific mission. Hopefully they can use today’s greatly advanced drilling technology to improve on the abortive attempts of the Americans and Soviets to pierce the crust of the planet.

IODP_Logo_NEW_web

eridanus-river

Eridanus is a large constellation which has been known since ancient times.   The constellation begins in the north (near Orion’s left foot) then winds south across the sky before snaking west towards Cetus the sea monster.  The river of stars which makes up Erdanus then doubles back east and eventually ends far to the south at the border with Hydrus, the water snake.  Because of its antiquity, there is some dispute as to where the name Eridanus came from:  second-century Greek astronomers believed the name indicated the sacred (mythical) river which Phaeton plummeted into after his unhappy attempt to drive the chariot of the sun.   Other etymologists, however, think that the name originated in ancient Mesopotamia where “the star of Eridu” was sacred to the primeval god Enki, lord of the abzu, a mythical abyss filled with all the fresh water in the world.  Eridu was the first known city of Earth, so the name may go back to the origin of civilization.

Enki in his watery home, the Abzu

Enki in his watery home, the Abzu

Whatever the origins of the name are, the constellation is the site of one of the strangest and most controversial objects in the heavens.  In 2007, astronomers using radio telescopes to survey the universe were astonished to discover nothing.  More specifically they discovered an immense and disconcerting amount of nothing—an enormous void in space time more than a billion light-years in diameter.  The Eridanus supervoid lies between six to 10 billion light-years away and its existence seems to be at odds with current cosmological models.

The Eridanus Supervoid (from an article by Bert Stevens)

The Eridanus Supervoid (from an article by Bert Stevens)

Cosmologists have several schools of thought concerning how the supervoid came into being and what its real nature is.  Because I am having trouble understanding any of these crazy theories, I have provided a rudimentary metaphor for each in blue (which would probably offend cosmologists, if they were reading my blog).

1)      Supporters of the standard model Big Bang theory say the region is colder because of dark energy, a hypothetical form of energy believed to permeate all of space.  If it exists, dark energy uniformly fills otherwise empty space yet interacts with none of the known forces in the universe (save gravity). The void is not empty but is filled with dark energy–which we do not yet understand: just like an empty room would seem empty to the Babylonians (despite being filled with air to us).

2)      A contrary theory proposes that the known universe orbits a supermassive black hole (in the same fashion that galaxies spiral around central black holes). This explanation would explain the “accelerating/expanding” universe as a sort of illusion: objects on the edge of the universe would be orbiting at a greater velocity than objects close to the black hole—a phenomenon which would affect their red shift relative to us.  Of course anything that got too close to the black hole in the void would be swallowed to an unknown doom into a black hole with the mass of another universe.  The universe is like an old vinyl record being spun around by a black hole in the center which is enormous beyond comprehension.  The expansion of the universe is an illusion caused by our limited perspective in such a scenario.   

3)      Laura Mersini-Houghton, a cosmologist who theorizes about the multiverse, believes that the supervoid is the imprint of another universe beyond our own.  Quantum entanglement has allowed us to see a shadow of this parallel universe in the form of the great empty spot located in Eridanus.  ??? Um, there are other universes out there which interact with our own in unknown ways which cause big holes (or maybe windows).

4)      Conservative astronomers speculate that the empty spot is an anomaly of the cosmic texture of the early universe.  Phase transition after the big bang resulted in heterogeneous distribution of matter. The universe is like a loaf of bread—sometimes it just has big holes in it because of the way it came into being.  

5)      The radiometric finding method by which the void was discovered is flawed.  The area only seems anomalously “cold” (in terms of EM emissions) because of a relatively hot ring of emissions surrounding it. The void doesn’t exist.  It was a mistake in observation.

6)      Something else entirely which we don’t yet comprehend and haven’t even imagined. Something else entirely which we don’t yet comprehend and haven’t even imagined.

I’ll be honest here.  Since I don’t have a radio telescope array or a degree in theoretical physics, these ideas are pretty hard to assay.  They are also wildly divergent.  I am therefore going to evaluate them aesthetically/emotionally (i.e. uselessly) in the following manner.  The first idea has the support of the astrophysics community, but is unsatisfactory until we have a more-than-theoretical understanding of dark energy (which could be forthcoming because of our discovery of the Higgs Bosun).  The second idea seems like it could be tested with mathematical modeling and astronomical observation (which so far seem to indicate there is no giant black hole in the middle of everything).  The third idea seems insane—and yet I have always intuitively felt that there are universes beyond this one (I’m sorry to be so guilty of such magical/hopeful thinking).  The fourth and fifth ideas seem quite plausible because they are boring (although why is the universe leavened like bread? Or why does it contain large relatively hot rings?).  The sixth idea is always applicable to everything.

Horses and Birds (M. C. Escher, 1949, wood engraving)

Horses and Birds (M. C. Escher, 1949, wood engraving)

Of course all this speculation may all be moot:  a more recent survey of the southern sky from a radio telescope in Australia suggests that there might be a much larger 3.5 billion light-year-wide void in the known universe.  That would certainly steer us back toward more conservative models of the universe, while at the same time leaving us with yet more questions.

A Composite Image of M104--The Sombrero Galaxy--taken from the Hubble Space Teelscope in Summer of 2003

A Composite Image of M104–The Sombrero Galaxy–taken from the Hubble Space Teelscope in Summer of 2003 (click on the image for a full-sized version)

Today I am posting some pictures of what I think is the most beautiful deep space object.  The Sombrero Galaxy (M104) is a nearby galaxy which is visible edge-on in the constellation of Virgo.  Actually, calling it an object might be a bit misleading since M104 consists of more than 400 billion stars–not to mention numerous associated globular clusters, innumerable planets, immense clouds of gas & gas, and a supermassive black hole which lies in the center.  The black hole in the center of M104 isn’t a mild mannered & quiescent black hole like the one in the center of the Milky Way either.  Based on the speed of revolution of the stars near the middle of M104, astronomers calculate that the central black hole has a billion times the mass of the sun.

An Infrared false-color image of the Sombrero Galaxy

An Infrared false-color image of the Sombrero Galaxy

In cosmic terms, the Sombrero galaxy is nearby—which is to say it is merely 28-odd million light years away.  The galaxy was discovered in the late eighteenth century by Pierre Méchain . Other prominent 18th century astronomers subsequently observed and studied M104, including Charles Messier (which is the reason the galaxy is included in the “Messier” catalog and has a M-designation) and the redoubtable William Herschel who noted a “dark-stratum” bounding the luminous central bulge.  We now know that this ring around M104 is a toroid dust lane of vast proportions which halos the galaxy.   Astronomers initially thought that the Sombrero Galaxy was an unbarred spiral galaxy, but thanks to observations from NASA’s Spitzer space telescope (an infrared scope orbiting Earth), the scientific community has revised their estimation of its size upward.  It lies somewhere between a spiral galaxy and an elliptical galaxy.   In other words, when you look at the Sombrero Galaxy, you are looking at something vast beyond human comprehension—a galaxy bigger than our own filled with who knows what things we will never know.  And yet if you expand the Hubble photo at the top of this post, you will see that all of the little stars shining around M104 are other galaxies farther away.

Olé!

Olé!

 

The constellation Sagittarius (from “Urania’s Mirror” a set of constellation cards published in England circa 1825)

My apologies for the blogging break last week.  Usually I try to write a new post every weekday, but last week was a blogging holiday.  To reinvigorate things after the lost week, let’s turn to a big subject—in fact a super-massive subject!  Long ago, Ferrebeekeeper featured a post about Eta Carinae, a blue hypergiant with a hundred times the mass of the sun (which is itself a million times more massive than Earth).  Stars like Eta Carinae are rarely formed and short lived—there are probably less than a dozen in our galaxy.  However compared to the most massive object in the galaxy, Eta Carinae is puny and common.  Twenty six thousand light years away from the solar system there exists a truly monstrous space object!

In 1974, Astronomers discovered an astronomical feature which was emitting exotic radio waves in the Sagittarius constellation. The scientists named the feature “Sagittarius A” and set out to determine what it was.  Part of the feature seems to be the remnants of a star which had gone supernova.  A second part of the feature is a cloud of ionized gas surrounded by an even larger torus of molecular gas.  In the middle of Sagittarius A is something which is emitting most of the high energy electromagnetic radiation visible to radio telescopes.  The cloud of ionized gas seems to be emptying into it and nearby stars orbit it with greater velocity than stars move anywhere else in the galaxy (in fact the object affects the proper motion of thousands of nearby stars).  And yet the space object at the center of Sagittarius A has a diameter of only 44 million kilometers–a bit less than the distance between the middle of the sun and Mercury at its perihelion (when the rocky planet is closest to the sun).  By calculating the proper motion of thousands of nearby stars, scientists determined that the mysterious object at the center of Sagittarius A (which they took to calling Sagitarrius A*) has mass of 4.31 million suns (i.e. solar masses). Whatever lies at the center of Sagittarius A–which I probably should have mentioned, is also the center of the Milky Way Galaxy–is smaller in volume than a large star, but has a mass which exceeds by many orders of magnitude even exotic hypergiants like Eta Carina.

Of course the only kinds of discrete objects which we know (or even hypothesize) to be capable of attaining such mass are black holes.  It is believed that most (indeed probably all) galaxies have super-massive black hole at their centers.  Smaller galaxies have small super massive black holes (forgive the oxymoron) but large galaxies have immense central black holes which can equal billions of solar masses.  Radio astronomers have observed plumes of exotic electromagnetic radiation coming from the center of other galaxies, and they wondered where the Milky Way’s galactic center was located.  It seems that a supernova near the galactic center blew away a great deal of the dust and gas on which the black hole would otherwise “feed” thereby making the galactic center of the Milky Way less energetic than the active center of farther (e.g. older) galaxies.

Artist’s Conception of Galactic Center

The super massive black holes which lie at the center of galaxies may be a result of the accretion of matter around stellar-sized black holes (which could grow quickly in matter-rich galactic cores) but most astrophysicists believe they are instead a primordial feature of the Big Bang around which galaxies themselves coalesced.  The ultimate nature of super massive black holes remains unknown and seems to be tied to the nature and shape of our universe.

The Black Dragon Gong Gong and the Serpent Goddess Nüwa

In Chinese mythology, Gong Gong was a tempestuous and unhappy water spirit of great strength.  He is usually portrayed as a raging black dragon or as a seething water monster.  In an earlier post concerning the Black Mansion—the Chinese underworld—I described how rigorously regimented the Chinese spirit world is (on earth, in heaven, and in hell).  Gong Gong was a spirit who was not happy with the rigid hierarchical order of things.  Despite his raw power, his job in the courts of heaven was to run trivial errands and fill out tedious paperwork.  Growing sick of what he perceived as menial chores, Gong Gong rebelled against the Jade Emperor.  In order to usurp control of heaven, he unleashed terrible floods and allied with a wicked nine-headed demon named Xiangliu.

Gong Gong hurls himself into Mount Buzhou

Together Gong Gong and Xiangliu brought about great destruction in the world.  The tumult they unleashed killed countless people.  But, despite the suffering they caused, the two could not defeat the powers of heaven.  They were opposed by Zhu Rong, the god of fire and ruler of the south, a mighty swordsman who fought mounted on the back of his magic tiger.  Unable to withstand Zhu Rong’s ferocity, the monsters were about to be defeated outright.  Infuriated and unwilling to accept such shame, Gong Gong hurled himself into Mount Buzhou, a mythical mountain which was one of the principal supports of heaven.  Part of the mountain collapsed and a terrible hole appeared in the sky.  The suffering caused by Gong Gong’s earlier actions was nothing compared to the catastrophe caused by this collapse.   Flood and fire swept earth.  Terrible creatures from beyond came through the rip in existence and ravaged the planet. Famine and horror stalked the world and it seemed as though all living things were doomed.

Nüwa Repairs the Breach in Heaven

With the other gods helpless, the creator goddess Nüwa again stepped forward.  She cut the legs off a great turtle and propped the sky back on its axis.  Then she gathered precious stones from a river and cast the breath of her magic into them.  With these multicolored stones she repaired the vault of heaven.  In some versions of the story she slew the black dragon Gong Gong whereas in other versions he sneaked away and still remains at large somewhere in the world.  Whatever the case, Nüwa’s repairs were not perfect.  The sun and moon now flow across the heavens from east to west and the stars were thrown from their position to drift with the seasons.  Even the North star was jarred from true north.

Nüwa Repairs the Breach in Heaven (a modern interpretation)

Strangely enough my favorite Chinese novel (maybe my favorite novel from anywhere) originates from this tumultuous myth.  The Story of the Stone was written by Cao Xueqin in the eighteenth century as the Qing dynasty first began to relentlessly unwind.  It is the story of a great princely house slowly losing its vigor and declining from within.  In a bigger sense it is the story of mortal kind and the ineluctable flux of our little lives. There are 40 major characters and more than four hundred minor ones in a drama that spans the epic breadth of Chinese history and culture (and takes up thousands of pages).  The portrayal of all levels of Chinese society is magnificent…but just beyond the petty intrigues, squabbles, affairs, and misunderstandings that make up the complex plot of The Story of the Stone are hints at an enigmatic divine order underpinning the cosmos.  From time to time, a strange beggar covered with sores and limping on an iron crutch shows up with magic medicines.  The female lead is hauntingly familiar with an otherworldy beauty to her mien.  And the protagonist of the story, Jia Baoyu, is a fey aristocratic adolescent who was born with a magic piece of jade in his mouth.  Although it doesn’t come up often in the novel and it is not obvious to the characters, the hero is the stone.  He was one of the gemstones given magical life by Nüwa in order to repair the breach in heaven–but he was not used because of a flaw.   Frustrated by life at the edge of heaven, he incarnates as a mortal and the book is the story of his human life…indeed of all human life.   I won’t say more about The Story of the Stone other than to apologize for not explaining how impossibly brilliant and ineffable the work is.  I must also offer an attendant caveat: this is the consummate literary masterpiece of China and, as such, it is overwhelmingly and heartbreakingly sad.

The Penguin version as elegantly translated by David Hawke

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