Friday, August 17, 2007

23292 Louis J. Sheehan

07.30.2007
Raw Data: Inside The Oldest Known Star
Astronomers find a star almost as old as the big bang.
by Josie Glausiusz
THE STUDY “Discovery of HE 1523-0901, a Strongly r-Process-Enhanced Metal-Poor Star With Detected Uranium,” by Anna Frebel et al., The Astrophysical Journal, May 10, 2007.

THE MOTIVE How do you determine the age of an ancient star? For distant galaxies, astronomers measure redshift—the stretching of light that indicates how fast the stars are receding and therefore how old they are relative to the age of the universe. But this doesn’t work for an ancient star nearby. So Anna Frebel of the McDonald Observatory at the University of Texas at Austin looked for chemical clues. She reckoned that a rare form of old “metal poor” star, one with one-thousandth the iron content of our own young sun, carries an internal clock, one composed of the radioactive elements uranium and thorium. Because these metals decay at a steady rate, an astute observer can extrapolate backward and pinpoint the star’s moment of birth. Frebel has found one such star in our own Milky Way and dated its birth to 13.2 billion years ago—barely 500 million years after the universe itself was born.

THE METHODS The older a star is, the fewer metals it contains. The first stars, which formed a few hundred million years after the Big Bang, were composed of only hydrogen, helium, and traces of lithium. Some tens of millions of years after their birth, these massive, puffy stars exploded as supernovas, and new heavy elements were born in their fiery depths. Frebel first hunted for their offspring, an old star with a chemical fingerprint that could be dated: 74 percent hydrogen, 25 percent helium, smidgens of uranium and thorium inherited from a parent supernova, and very little iron—a relatively light element that accumulated later in history as the universe evolved and that would obscure any signal from the radioactive components. To detect uranium and thorium, Frebel could measure the strength of their absorption lines in a spectrum—in other words, calculate how much light each element absorbs at a particular wavelength. Frebel used the Clay Magellan Telescope in the Chilean Andes to search the halo of the Milky Way—its outer reaches, where old stars lurk—and turned up a bright red giant about eight-tenths the mass of our sun, dubbed HE 1523-0901, that appeared to meet all the requirements.
Frebel then turned to the European Southern Observatory’s Very Large Telescope in northern Chile. The VLT incorporates the Ultraviolet-Visual Echelle Spectrograph, or UVES, which acts like a supersensitive prism, splitting light collected by the telescope into a rainbow. Staff at the VLT collected the star’s spectra, from which Frebel calculated its uranium and thorium content.
Finally, Frebel compared her results with theoretical models that compute the quantities of heavy metals in stars at the moment of their formation. These programs model the process of nuclear synthesis in supernovas and infer how much uranium and thorium would be present at the birth of new stars. By subtracting her own figures on the star’s current heavy-element content from these theoretical estimates, Frebel determined how much radioactive decay had occurred and, therefore, established its age. HE 1523-0901 “is certainly among the oldest stars,” Frebel says, “and was probably formed as the second or third generation of stars.”

THE MEANING “Recently the Wilkinson Microwave Anisotropy Probe measured the age of the universe to be 13.7 billion years from the cosmic microwave background,” Frebel says. “The actual age measurement of a star provides an independent lower limit of the age of the universe.”

23901 Louis J. Sheehan

23901 Louis J. Sheehan

08.14.2007
How Final is a Space Burial?
A trip to the heavens can last a lot shorter than a trip to heaven.
by Boonsri Dickinson
For only $995, Space Services of Houston will pack a statistically insignificant 0.3 to 0.5 percent of your cremated remains in a lipstick-size container and send it 72 miles up. But that’s no guarantee of a final resting place in the heavens. Most of the 300 people whose ashes have rocketed into the cosmos since Star Trek creator Gene Roddenberry’s landmark space burial over a decade ago have since crashed back to Earth. Just last April, James “Scotty” Doohan and Gemini program astronaut Gordon Cooper spent mere minutes in space before landing in a remote corner of New Mexico. A search team spent weeks locating the “lost payload.”
Later this year, Space Services plans to extend its services to orbiting flights. Even then, the container will circle the Earth only until its orbit decays and its spacecraft burns up in the atmosphere, which could take anywhere from 5 to 200 years. Or you could try a moon burial à la Eugene Shoemaker, codiscoverer of the Comet Shoemaker-Levy; Shoemaker’s ashes were sent crashing into a moon crater during the NASA Lunar Prospector mission.
“Cremation memorials are becoming more trendy around the world,” says Space Services CEO Charlie Chafer, who estimates that the number of space funerals will skyrocket to as many 10,000 a year by 2012. More ambitious—and permanent—space funerals will come with a hefty price tag: $44,995 to get your ashes on the moon or into deep space. As for Chafer’s end-of-life intentions, he puts his mouth where his money is. “I tell my employees to fly me on every flight we do until you run out of me,” he says.

23293 Louis J. Sheehan, Esquire

23293 Louis J. Sheehan, Esquire

The New York Evening Post commented in McClellan's obituary, "Probably no soldier who did so little fighting has ever had his qualities as a commander so minutely, and we may add, so fiercely discussed." This fierce discussion has continued for over a century. McClellan is usually ranked in the lowest tier of Civil War generals. However, the debate over McClellan's ability and talents remains the subject of much controversy among Civil War and military historians. He has been universally praised for his organizational abilities and for his very good relations with his troops. They referred to him affectionately as "Little Mac"; others sometimes called him the "Young Napoleon". It has been suggested that his reluctance to enter battle was caused in part by an intense desire to avoid spilling the blood of his men. Ironically, this led to failing to take the initiative against the enemy and therefore passing up good opportunities for decisive victories, which could have ended the war early, and thereby could have spared thousands of soldiers who died in those subsequent battles. Generals who proved successful in this era, such as Lee and Grant, tended to be more aggressive and more willing to risk a major battle even when all preparations were not perfect. McClellan himself summed up his cautious nature in a draft of his memoirs: "It has always been my opinion that the true course in conducting military operations, is to make no movement until the preparations are as complete as circumstances permit, & never to fight a battle without some definite object worth the probable loss."
McClellan's reluctance to press his enemy aggressively was probably not a matter of personal courage, which he demonstrated well enough by his bravery under fire in the Mexican War. Stephen Sears wrote, "There is indeed ample evidence that the terrible stresses of commanding men in battle, especially the beloved men of his beloved Army of the Potomac, left his moral courage in tatters. Under the pressure of his ultimate soldier's responsibility, the will to command deserted him. Glendale and Malvern Hill found him at the peak of his anguish during the Seven Days, and he fled those fields to escape the responsibility. At Antietam, where there was nowhere for him to flee to, he fell into a paralysis of indecision. Seen from a longer perspective, General McClellan could be both comfortable and successful performing as executive officer, and also, if somewhat less successfully, as grand strategist; as battlefield commander, however, he was simply in the wrong profession."
One of the reasons that McClellan's reputation has suffered is because of his own memoirs. His original draft was completed in 1881, but the only copy was destroyed by fire. He began to write another draft of what would be published posthumously, in 1887, as McClellan's Own Story. However, he died before it was half completed and his literary executor, William C. Prime, editor of the pro-McClellan New York Journal of Commerce, included excerpts from some 250 of McClellan's wartime letters to his wife, in which it had been his habit to reveal his innermost feelings and opinions in unbridled fashion.
While McClellan's reputation has suffered over time, especially over the last 75 years, there is a small but intense cadre of American Civil War historians who believe that the general has been poorly served on at least four levels. First, McClellan proponents say that because the general was a conservative Democrat with great personal charisma, radical Republicans fearing his political potential deliberately undermined his field operations. Second, that as the radical Republicans were the true winners coming out of the American Civil War, they were able to write its history, placing their principal political rival of the time, McClellan, in the worst possible light. Third, that historians eager to jump on the bandwagon of Lincoln as America's greatest political icon worked to outdo one another in shifting blame for early military failures from Lincoln and Secretary of War Edwin M. Stanton to McClellan. And fourth, that Lincoln and Stanton deliberately undermined McClellan because of his conciliatory stance towards the South, which would have resulted in a less destructive end to the war had Richmond fallen as a result of the Peninsula Campaign. Proponents of this school claim that McClellan is criticized more for his admittedly abrasive personality than for his actual field performance.
Several geographic features and establishments have been named for George B. McClellan. These include Fort McClellan in Alabama, McClellan Butte in the Mount Baker-Snoqualmie National Forest, where he traveled in the area while conducting the Pacific Railroad Survey in 1853, McClellan Street in North Bend, Washington, McClellan Street in South Philadelphia, McClellan Elementary School in Chicago, and a bronze equestrian statue honoring General McClellan in Washington, D.C.

23292 Louis J. Sheehan

23292 Louis J. Sheehan

The New York Evening Post commented in McClellan's obituary, "Probably no soldier who did so little fighting has ever had his qualities as a commander so minutely, and we may add, so fiercely discussed." This fierce discussion has continued for over a century. McClellan is usually ranked in the lowest tier of Civil War generals. However, the debate over McClellan's ability and talents remains the subject of much controversy among Civil War and military historians. He has been universally praised for his organizational abilities and for his very good relations with his troops. They referred to him affectionately as "Little Mac"; others sometimes called him the "Young Napoleon". It has been suggested that his reluctance to enter battle was caused in part by an intense desire to avoid spilling the blood of his men. Ironically, this led to failing to take the initiative against the enemy and therefore passing up good opportunities for decisive victories, which could have ended the war early, and thereby could have spared thousands of soldiers who died in those subsequent battles. Generals who proved successful in this era, such as Lee and Grant, tended to be more aggressive and more willing to risk a major battle even when all preparations were not perfect. McClellan himself summed up his cautious nature in a draft of his memoirs: "It has always been my opinion that the true course in conducting military operations, is to make no movement until the preparations are as complete as circumstances permit, & never to fight a battle without some definite object worth the probable loss."
McClellan's reluctance to press his enemy aggressively was probably not a matter of personal courage, which he demonstrated well enough by his bravery under fire in the Mexican War. Stephen Sears wrote, "There is indeed ample evidence that the terrible stresses of commanding men in battle, especially the beloved men of his beloved Army of the Potomac, left his moral courage in tatters. Under the pressure of his ultimate soldier's responsibility, the will to command deserted him. Glendale and Malvern Hill found him at the peak of his anguish during the Seven Days, and he fled those fields to escape the responsibility. At Antietam, where there was nowhere for him to flee to, he fell into a paralysis of indecision. Seen from a longer perspective, General McClellan could be both comfortable and successful performing as executive officer, and also, if somewhat less successfully, as grand strategist; as battlefield commander, however, he was simply in the wrong profession."
One of the reasons that McClellan's reputation has suffered is because of his own memoirs. His original draft was completed in 1881, but the only copy was destroyed by fire. He began to write another draft of what would be published posthumously, in 1887, as McClellan's Own Story. However, he died before it was half completed and his literary executor, William C. Prime, editor of the pro-McClellan New York Journal of Commerce, included excerpts from some 250 of McClellan's wartime letters to his wife, in which it had been his habit to reveal his innermost feelings and opinions in unbridled fashion.
While McClellan's reputation has suffered over time, especially over the last 75 years, there is a small but intense cadre of American Civil War historians who believe that the general has been poorly served on at least four levels. First, McClellan proponents say that because the general was a conservative Democrat with great personal charisma, radical Republicans fearing his political potential deliberately undermined his field operations. Second, that as the radical Republicans were the true winners coming out of the American Civil War, they were able to write its history, placing their principal political rival of the time, McClellan, in the worst possible light. Third, that historians eager to jump on the bandwagon of Lincoln as America's greatest political icon worked to outdo one another in shifting blame for early military failures from Lincoln and Secretary of War Edwin M. Stanton to McClellan. And fourth, that Lincoln and Stanton deliberately undermined McClellan because of his conciliatory stance towards the South, which would have resulted in a less destructive end to the war had Richmond fallen as a result of the Peninsula Campaign. Proponents of this school claim that McClellan is criticized more for his admittedly abrasive personality than for his actual field performance.
Several geographic features and establishments have been named for George B. McClellan. These include Fort McClellan in Alabama, McClellan Butte in the Mount Baker-Snoqualmie National Forest, where he traveled in the area while conducting the Pacific Railroad Survey in 1853, McClellan Street in North Bend, Washington, McClellan Street in South Philadelphia, McClellan Elementary School in Chicago, and a bronze equestrian statue honoring General McClellan in Washington, D.C.

23291 Louis J. Sheehan

23291 Louis J. Sheehan

After the war, McClellan and his family departed for a lengthy trip to Europe (from 1865 to 1868), during which he did not participate in politics. When he returned, the Democratic Party expressed some interest in nominating him for president again, but when it became clear that Ulysses S. Grant would be the Republican candidate, this interest died. McClellan worked on engineering projects in New York City and was offered the position as president of the newly formed University of California.
McClellan was appointed chief engineer of the New York City Department of Docks in 1870. Evidently, the position did not demand his full-time attention because, starting in 1872, he also served as the president of the Atlantic and Great Western Railroad. He and his family returned to Europe from 1873 to 1875.
In 1877, McClellan was nominated by the Democrats for Governor of New Jersey, an action that took him by surprise because he had not expressed an interest in the position. He was elected and served a single term from 1878 to 1881, a tenure marked by careful, conservative executive management and minimal political rancor. The concluding chapter of his political career was his strong support in 1884 for the election of Grover Cleveland. He hoped to be named secretary of war in Cleveland's cabinet, a position for which he was well suited, but political rivals from New Jersey were able to block his nomination.
McClellan's final years were devoted to traveling and writing. He justified his military career in McClellan’s Own Story, published posthumously in 1887. He died unexpectedly at age 58 at Orange, New Jersey, having suffered from chest pains for a few weeks. His final words, at 3 a.m., October 29, 1885, were, "I feel easy now. Thank you." He is buried at Riverview Cemetery in Trenton.
McClellan's son, George B. McClellan, Jr. (1865 – 1940), was born in Dresden, Germany, during the family's first trip to Europe. Known within the family as Max, he was also a politician, serving as a United States Representative from New York State and as Mayor of New York City from 1904 to 1909. McClellan's daughter, Mary ("May") (1861 – 1945), married a French diplomat and spent much of her life abroad. His wife Ellen died in Nice, France, while visiting May at "Villa Antietam." Neither Max nor May gave the McClellans any grandchildren.

23290 Louis J Sheehan

23290 Louis J Sheehan

Secretary Stanton ordered McClellan to report to Trenton, New Jersey, for further orders, although none were issued. As the war progressed, there were various calls to return Little Mac to an important command, following the Union defeats at Fredericksburg and Chancellorsville, as Robert E. Lee moved north at the start of the Gettysburg Campaign, and as Jubal Early threatened Washington in 1864. When Ulysses S. Grant became general in chief, he discussed returning McClellan to an unspecified position. But all of these opportunities were impossible, given the opposition within the administration and the knowledge that McClellan posed a potential political threat. McClellan worked for months on a lengthy report describing his two major campaigns and his successes in organizing the Army, replying to his critics and justifying his actions by accusing the administration of undercutting him and denying him necessary reinforcements. The War Department was reluctant to publish his report because, just after completing it in October 1863, McClellan openly declared his entrance to the political stage as a Democrat.


Union party poster for Pennsylvania warning of disaster if McClellan wins
McClellan was nominated by the Democrats to run against Abraham Lincoln in the 1864 U.S. presidential election. Following in the tradition of Winfield Scott, he ran as a U.S. Army general still on active duty; he did not resign his commission until election day, November 8, 1864. He supported continuation of the war and restoration of the Union, but the party platform, written by Copperhead Clement Vallandigham of Ohio, was opposed to this position. The platform called for an immediate cessation of hostilities and a negotiated settlement with the Confederacy. McClellan was forced to repudiate his party's platform, which made his campaign inconsistent and difficult. He was also not helped by the party's choice for vice president, George H. Pendleton, a peace candidate from Ohio.
The deep division in the party, the unity of the Republicans (running under the label "National Union Party"), and the military successes by Union forces in the fall of 1864 doomed McClellan's candidacy. Lincoln won the election handily, with 212 Electoral College votes to 21 and a popular vote of 403,000, or 55%. While McClellan was highly popular among the troops when he was commander, they voted for Lincoln over him by margins of 3-1 or higher. Lincoln's share of the vote in the Army of the Potomac was 70%.

23287 Louis J Sheehan

23287 Louis J Sheehan
On November 1, 1861, Winfield Scott retired and McClellan became general in chief of all the Union armies. The president expressed his concern about the "vast labor" involved in the dual role of army commander and general in chief, but McClellan responded, "I can do it all."
Lincoln, as well as many other leaders and citizens of the northern states, became increasingly impatient with McClellan's slowness to attack the Confederate forces still massed near Washington. The Union defeat at the minor Battle of Ball's Bluff near Leesburg in October added to the frustration and indirectly damaged McClellan. In December, the Congress formed a Joint Committee on the Conduct of the War, which became a thorn in the side of many generals throughout the war, accusing them of incompetence and, in some cases, treason. McClellan was called as the first witness on December 23, but he contracted typhoid fever and could not attend. Instead, his subordinate officers testified, and their candid admissions that they had no knowledge of specific strategies for advancing against the Confederates raised many calls for McClellan's dismissal.
McClellan further damaged his reputation by his insulting insubordination to his commander-in-chief. He privately referred to Lincoln, whom he had known before the war as a lawyer for the Illinois Central, as "nothing more than a well-meaning baboon", a "gorilla", and "ever unworthy of ... his high position." On November 13, he snubbed the president, visiting at McClellan's house, by making him wait for 30 minutes, only to be told that the general had gone to bed and could not see him.
On January 12, 1862, McClellan was summoned to the White House, where the Cabinet demanded to hear his war plans. For the first time, he revealed his intentions to transport the Army of the Potomac by ship to Urbanna, Virginia, on the Rappahannock River, outflanking the Confederate forces near Washington, and proceeding 50 miles overland to capture Richmond. He refused to give any specific details of the proposed campaign, even to his friend, newly appointed War Secretary Edwin M. Stanton. On January 27, Lincoln issued an order that required all of his armies to begin offensive operations by February 22, Washington's birthday. On January 31, he issued a supplementary order that directed the Army of the Potomac to move overland to attack the Confederates at Manassas Junction and Centreville. McClellan immediately replied with a 22-page letter objecting in detail to the president's plan and advocating instead his Urbanna plan, which was the first written instance of the details presented to the president. Although Lincoln believed that his plan was superior, he was relieved that McClellan finally agreed to begin movement and reluctantly approved. On March 8, doubting McClellan's resolve, Lincoln again interfered with the army commander's prerogatives. He called a council of war at the White House in which McClellan's subordinates were asked about their confidence in the Urbanna plan. They expressed their confidence to varying degrees. After the meeting, Lincoln issued another order, naming specific officers as corps commanders to report to McClellan (who had been reluctant to do so prior to assessing his division commanders' effectiveness in combat, even though this would have meant his direct supervision of twelve divisions in the field).
Two more crises would hit McClellan before he could implement his plans. The Confederate forces under General Joseph E. Johnston withdrew from their positions before Washington, assuming new positions south of the Rappahannock, which completely nullified the Urbanna strategy. McClellan retooled his plan so that his troops would disembark at Fort Monroe, Virginia, and advance up the Virginia Peninsula to Richmond, an operation that would be known as the Peninsula Campaign. However, McClellan came under extreme criticism from the press and the Congress when it was found that Johnston's forces had not only slipped away unnoticed, but that they had for months fooled the Union Army through the use of Quaker Guns. The Congress's joint committee visited the abandoned Confederate lines and radical Republicans introduced a resolution demanding the dismissal of McClellan, but it was narrowly defeated by a parliamentary maneuver. The second crisis was the emergence of the Confederate ironclad CSS Virginia, which threw Washington into a panic and made naval support operations on the James River seem problematic.
On March 11, 1862, Lincoln removed McClellan as general-in-chief, leaving him in command of only the Army of the Potomac, ostensibly so that McClellan would be free to devote all his attention to the move on Richmond. Lincoln's order was ambiguous as to whether McClellan might be restored following a successful campaign. In fact, his position was not filled by another officer. Lincoln, Stanton, and a group of officers called the "War Board" directed the strategic actions of the Union armies that spring. Although McClellan was assuaged by supportive comments Lincoln made to him, in time he saw the change of command very differently, describing it as a part of an intrigue "to secure the failure of the approaching campaign."