Saturday, August 26, 2017

Monday, August 21, 2017

Solar Eclipse

Here’s everything you need to know about today’s solar eclipse.

1. 1st Total Solar Eclipse in 38 Years…

…for those in contiguous United States (excluding Alaska and Hawaii). The last time anyone in mainland US saw a total eclipse of the Sun was on February 26, 1979. If you live in the US and miss this event, you’ll have to wait 7 more years, until April 8, 2024, to see a total solar eclipse from a location in the contiguous United States.

2. Most North Americans Will Be Able To See Totality…

…if they are willing to drive that is. The total eclipse will only be visible along the Moon’s central shadow, which at its widest will be about 115 kilometers (71.5 miles), according to some sources. Its path will span from the country’s West Coast to the East Coast. The rest of North America, as well as Central America and northern parts of South America, will experience a partial solar eclipse. NASA has estimated that a majority of the American population lives less than a 2-day drive away from the path of totality.

3. A Once-In-A-Lifetime Event

While total solar eclipses are not rare—they occur twice every 3 years on average and can be seen from some part of the Earth—a total eclipse of the Sun that can be seen from the American West Coast to the American East Coast occurs less frequently. In fact, the last time a total solar eclipse was visible from coast to coast was almost 100 years ago, on June 8, 1918!

What makes this eclipse extra special is that it is the first time since the total solar eclipse of January 11, 1880 that a total solar eclipse will occur exclusively over the continental United States—no other country will see totality, though many countries will see a partial eclipse of the Sun.

Because of these reasons, the eclipse is also being called the Great American Eclipse.

4. Parts of 14 American States Will Go Dark…

…for the 2 minutes of totality. The Yaquina Head Lighthouse in Newport, Oregon will be the first location on continental US soil to see totality. The partial phase of the eclipse will begin here at 9:04 am local time. Lincoln City, Oregon will also be one of the first locations in the country to experience totality.

Oregonians will also be the first to see totality as the Moon’s shadow moves east at an average speed of about 3600 km/h (2237 mph). After Oregon, the eclipse will move through Idaho, Wyoming, Nebraska, Kansas, Missouri, Illinois, Kentucky, Tennessee, North Carolina, Georgia, and South Carolina. Montana and Iowa are the only states where the path of totality will pass through unpopulated areas. People in Charleston, South Carolina will be some of the last people in the US to see totality.

Nashville, Tennessee is one of the few large cities in the United States to fall completely within the eclipse’s path of totality. Interestingly, only some parts of Kansas City, Kansas and Kansas City, Missouri will be able to see a total solar eclipse.

5. Totality Will Be Spectacular

If you are lucky enough to be in the path of totality, you are in for an astronomical treat, weather permitting, of course. When the eclipse begins, at 1st contact, it will appear as if the Moon is taking a bite out of the Sun. As the eclipse progresses, the sky will get darker, the temperature will drop, and if you pay attention, animals and birds will become quieter.

At 2nd contact, which is when totality begins, Baily’s Beads become visible. As the Moon completely covers the Sun’s surface, the diamond ring can be seen. You might also see pink spots called prominences near the diamond. These spots are caused by gases on the Sun’s surface.

Totality is the only time when one can see the corona, the Sun’s atmosphere. At 3rd contact, Baily’s Beads will once again become visible and a second diamond ring may appear.

6. Stars During the Daytime

As the sky turns dark, planets and stars hidden in the sky by the Sun’s bright light will reappear. Look for Mars, Mercury, Jupiter, and Venus during totality.

7. You Will Need Eye Protection

Do not look directly at the Sun, before, during or after the eclipse without any protective eyewear.

Looking at the Sun with your naked eyes is highly dangerous and can even cause blindness. The safest way to see a solar eclipse is to wear protective eclipse glasses or use a pinhole projector you can easily make yourself.

8. Part of Saros Series 145

Solar eclipses occur in cycles. The Saros cycle, one of the most studied eclipse cycles, occurs every 18 years. Two solar eclipses separated by a Saros cycle have similar features—they occur at the same lunar node, with the Moon roughly at the same distance from the Earth. The eclipses also take place at about the same time of the year and around the same time of day. Eclipses that are separated by a Saros cycle are part of a Saros series.

The August 21, 2017 total solar eclipse belongs to Saros series 145. It is the 22nd eclipse in a series of 77 eclipses. The series began with a partial solar eclipse visible from the Northern Hemisphere on January 4, 1639 and will end with a partial solar eclipse visible from the Southern Hemisphere on April 17, 3009.

The next eclipse in the series—a total solar eclipse—will take place on September 2, 2035.

And remember, let’s be careful out there: don’t look directly at the sun.

The first solar eclipse I remember was the one on July 20, 1963.  We were up in Michigan and my dad and I were painting our little Puddleduck sailboat and named it “Swallow” after the boat in the Arthur Ransome stories.  We were in the backyard and I had fashioned a pinhole projector out of two pieces of cardboard.  The sun was 78% blocked, but it didn’t seem much darker than your average twilight.

Saturday, July 22, 2017

Saturday, July 15, 2017

Thursday, July 13, 2017

Sunday, July 2, 2017

Sunday Reading

American Dignity on the Fourth of July — David Remnick in The New Yorker.

More than three-quarters of a century after the delegates of the Second Continental Congress voted to quit the Kingdom of Great Britain and declared that “all men are created equal,” Frederick Douglass stepped up to the lectern at Corinthian Hall, in Rochester, New York, and, in an Independence Day address to the Ladies of the Rochester Anti-Slavery Sewing Society, made manifest the darkest ironies embedded in American history and in the national self-regard. “What, to the American slave, is your 4th of July?” Douglass asked:

I answer; a day that reveals to him, more than all other days in the year, the gross injustice and cruelty to which he is the constant victim. To him, your celebration is a sham; your boasted liberty, an unholy license; your national greatness, swelling vanity; your sounds of rejoicing are empty and heartless; your denunciations of tyrants, brass fronted impudence; your shouts of liberty and equality, hollow mockery; your prayers and hymns, your sermons and thanksgivings, with all your religious parade, and solemnity, are, to him, mere bombast, fraud, deception, impiety, and hypocrisy—a thin veil to cover up crimes which would disgrace a nation of savages. There is not a nation on the earth guilty of practices, more shocking and bloody, than are the people of these United States, at this very hour.

The dissection of American reality, in all its complexity, is essential to political progress, and yet it rarely goes unpunished. One reason that the Republican right and its attendant media loathed Barack Obama is that his public rhetoric, while far more buoyant with post-civil-rights-era uplift than Douglass’s, was also an affront to reactionary pieties. Even as Obama tried to win votes, he did not paper over the duality of the American condition: its idealism and its injustices; its heroism in the fight against Fascism and its bloody misadventures before and after. His idea of a patriotic song was “America the Beautiful”—not in its sentimental ballpark versions but the way that Ray Charles sang it, as a blues, capturing the “fullness of the American experience, the view from the bottom as well as the top.”

Donald Trump, who, in fairness, has noted that “Frederick Douglass is an example of somebody who’s done an amazing job,” represents an entirely different tradition. He has no interest in the wholeness of reality. He descends from the lineage of the Know-Nothings, the doomsayers and the fabulists, the nativists and the hucksters. The thematic shift from Obama to Trump has been from “lifting as we climb” to “raising the drawbridge and bolting the door.” Trump may operate a twenty-first-century Twitter machine, but he is still a frontier-era drummer peddling snake oil, juniper tar, and Dr. Tabler’s Buckeye Pile Cure for profit from the back of a dusty wagon.

As a candidate, Trump told his followers that he would fulfill “every dream you ever dreamed for your country.” But he is a plutocrat. His loyalty is to the interests of the plutocracy. Trump’s vows of solidarity with the struggling working class, with the victims of globalization and deindustrialization, are a fraud. He made coal miners a symbol of his campaign, but he has always held them in contempt. To him, they are luckless schmoes who fail to possess his ineffable talents. “The coal miner gets black-lung disease, his son gets it, then his son,” Trump once told Playboy. “If I had been the son of a coal miner, I would have left the damn mines. But most people don’t have the imagination—or whatever—to leave their mine. They don’t have ‘it.’ ”

Trump is hardly the first bad President in American history—he has not had adequate time to eclipse, in deed, the very worst—but when has any politician done so much, so quickly, to demean his office, his country, and even the language in which he attempts to speak? Every day, Trump wakes up and erodes the dignity of the Presidency a little more. He tells a lie. He tells another. He trolls Arnold Schwarzenegger. He trolls the press, bellowing “enemy of the people” and “fake news!” He shoves aside a Balkan head of state. He summons his Cabinet members to have them swear fealty to his awesomeness. He leers at an Irish journalist. Last Thursday, he tweeted at Joe Scarborough and Mika Brzezinski, of MSNBC: “I heard poorly rated @Morning_Joe speaks badly of me (don’t watch anymore). Then how come low I.Q. Crazy Mika, along with Psycho Joe, came . . . to Mar-a-Lago 3 nights in a row around New Year’s Eve, and insisted on joining me. She was bleeding badly from a face-lift. I said no!” The President’s misogyny and his indecency are well established. When is it time to question his mental stability?

The atmosphere of debasement and indignity in the White House, it appears, is contagious. Trump’s family and the aides who hastened to serve him have learned to imitate his grossest reflexes, and to hell with the contradictions. Melania Trump, whose “cause” is cyber-bullying, defends the poisoned tweet at Brzezinski. His righteously feminist daughter Ivanka stays mum. After the recent special election in Georgia, Kellyanne Conway, the counsellor to the President, tweeted, “Laughing my #Ossoff.” The wit! The valor! Verily, the return of Camelot!

Trump began his national ascendancy by hoisting the racist banner of birtherism. Since then, as candidate and as President, he has found countless ways to pollute the national atmosphere. If someone suggests a lie that is useful to him, he will happily pass it along or endorse it. This habit is not without purpose or cumulative effect. Even if Trump fails in his most ambitious policy initiatives, whether it is liberating the wealthy from their tax obligations or liberating the poor from their health care, he has already begun to foster a public sphere in which, as Hannah Arendt put it in her treatise on totalitarian states, millions come to believe that “everything was possible and that nothing was true.”

Frederick Douglass ended his Independence Day jeremiad in Rochester with steadfast optimism (“I do not despair of this country”). Read his closing lines, and what despair you might feel when listening to a President who abets ignorance, isolation, and cynicism is eased, at least somewhat. The “mental darkness” of earlier times is done, Douglass reminded his audience. “Intelligence is penetrating the darkest corners of the globe.” There is yet hope for the “great principles” of the Declaration of Independence and “the genius of American Institutions.” There was reason for optimism then, as there is now. Donald Trump is not forever. Sometimes it just seems that way.

Making the Grade — The Miami Herald editorial board.

Every traditional public school in Miami-Dade County made the grade, and not one of those grades was an F. It’s a gratifying and hard-won accomplishment for schools chief Alberto Carvalho and his team, School Board members, educators in all capacities, parents and, of course, the students. And it’s a first.

The achievement is the result of a slow but steady march to the day when the state Department of Education would release the annual school grades and every school in the county would receive a passing grade. That glorious day arrived last week.

Success came despite the challenges — or maybe because of them. There are schools with large numbers of students living in poverty and low parental engagement. About 70 percent of students district-wide get reduced-price or free lunch because they come from low-income families. And more than 72,000 students are learning English. All are indicators of students facing the most hurdles to academic success. The district amped up the focus on them. “We put in counselors and coaches,” Carvalho told the Editorial Board. “ We put in new supports for fragile schools.”

The district earned a B average overall; two-thirds of all schools received a grade of A or B. Almost 20 years ago, there were 26 F schools in Miami-Dade.

School grades are weighted most heavily toward students’ scores on standardized tests, with graduation rates and the number of students taking advanced courses also factored in. What makes the school district’s no-F achievement even more remarkable is that since 1999, when the tests were first administered, state legislators have tinkered and rejiggered and generally messed around, making the test always more difficult — arbitrarily setting back some students’ progress — and harder to administer. The introduction of computers, for instance, was a disaster, plus many poor students had little experience with such technology in their homes.

In fact, the only failure in the district’s good-news story is that of the state Legislature — again. As reported by Kristen Clark of the Herald/Tallahassee new bureau, because of the new education reform law, Senate Bill 7069, passed during the session, 650 charter schools throughout the state, privately managed and independent of schools districts, could be entitled to receive as much as $96 million from school districts’ taxpayer funds for construction and maintenance. At the very least, lawmakers imposed certain financial and academic standards before many of these for-profit schools can receive funds.

There’s more: Superintendent Carvalho rightly laments new restrictions placed on the use of federal Title 1 funds. Public-school districts are expected to distribute this funding for schools with poor and at-risk students to private and charter schools, as well. In addition, under a new state-imposed formula, the Title 1 money that remains with the district must be spread further throughout the district, clearly with the potential to dilute the beneficial impact these funds have when concentrated in the neediest schools.

“SB 7069 rewards publicly funded schools that don’t have a track record of lifting failing students,” Carvalho told the Editorial Board. He later added that “These funding levels and restrictions will endanger the progress we have made.”

It’s a legitimate fear. For this sweeping law that will likely undermine hard-won gains like those in Miami-Dade, lawmakers have earned an F.

How to Get an Asteroid Named After You — Marina Koren in The Atlantic.

Mary Lou Whitehorne was at a work conference in 2007 when her colleagues surprised her with an asteroid.They were at an annual meeting of the Royal Astronomical Society of Canada in Calgary. Whitehorne, a member of the organization and a longtime science educator, was standing outside of a pub, engaged in a conversation, when a coworker called her inside. He had a special announcement to make: A small asteroid, orbiting between Mars and Jupiter, had been named after Whitehorne.“I was completely floored and completely speechless,” Whitehorne says.

Whitehorne’s colleagues had waited about two years for the name to be approved. Asteroids can’t be named for just anything or anyone; there’s a careful selection process with lots of rules, managed by an international organization in charge of collecting and sorting observational data for asteroids. The organization is the Minor Planet Center, which is run out of the Smithsonian Astrophysical Observatory in Massachusetts, and under the purview of the International Astronomical Union, an organization of professional astronomers.

The first asteroids to be discovered, in the early 1800s, were named for figures in Roman and Greek mythology, like Ceres, Pallas, and Vesta. Astronomers ran out of those options fairly quickly, so they started looking elsewhere. Today, most asteroids are named for people, both real and fictional, and the rest for places, animals, plants, and other natural phenomena. The discoverers of asteroids are responsible for proposing the names—but there are rules, and their proposals can get denied.When a new asteroid is first spotted, the Minor Planet Center gives it a provisional designation composed of the the year of discovery and two numbers. If astronomers successfully study and confirm its orbit, it gets a permanent numeral designation that corresponds with the object’s place on the chronological list of previous discoveries. The discoverer then has 10 years to suggest and submit a name for the object, including a short pitch for why the name should be accepted. A 15-person committee at the International Astronomical Union judges the name and, if it approves, publishes it in a monthly newsletter.The names should be “16 characters or less in length; preferably one word; pronounceable (in some language); non-offensive; and not too similar to an existing name” of an asteroid, according to the Minor Planet Center’s website.

There are guidelines for certain kinds of asteroids. Objects that cross or approach the orbit of Neptune, for example, must be named for mythological figures associated with the underworld, while objects right outside of Neptune’s orbit get named for mythological figures related to creation.

Asteroids can’t be named for pets, but there’s at least one named for a cat, allowed perhaps because the cat itself was named for a Star Trek character. In 1985, an astronomer received approval to name his asteroid Mr. Spock, after the cat that had kept him company during long hours at work.Discoverers can’t sell the chance to name their asteroid, but naming contests are allowed. In 2012, NASA asked students to name (101955) 1999 RQ36, a near-Earth asteroid and the target of a robotic mission, OSIRIS-REx, which launched last year. They picked Bennu, for the Egyptian mythological bird resembling a heron.Whitehorne’s asteroid was among a number of asteroids discovered by three astronomers doing comet surveys in 2004. Her colleagues knew of the trio and their work, and asked them whether they could claim one in Whitehorne’s honor, to celebrate her years of contributions to the field. Whitehorne started out 30 years ago as a volunteer amateur astronomer at a small planetarium in Halifax, her hometown. Not long after, she jumped into astronomy and science education, working with students and teachers and developing programs and curricula for schools across the country. In 2015, she became the first female fellow at the Royal Astronomical Society of Canada, a position created to recognize the contributions of long-serving members.

Whitehorne has seen only a photograph of her asteroid, which is about three-kilometers across. It’s too faint to see with her backyard telescope. She calls it her “orbiting tombstone.”

“I am mortal and I am going to die, but my name is going to be on the asteroid as long as there’s human civilization and society on this planet,” she says. “Every once in a while I think about that and think, my goodness, what have I done?”

 Doonesbury — Safe.

Saturday, May 6, 2017

Saturday, April 15, 2017

Thursday, February 23, 2017

Saturday, December 24, 2016

One Christmas Eve

Forty-eight years ago tonight — December 24, 1968 — the crew of Apollo 8 saw things that no human being had ever seen before with their own eyes, including the far side of the moon and the earth rising over the lunar horizon. So it’s understandable that the moment called for a little reading of some pleasant poetry from a book called Genesis.

HT to NTodd.

Saturday, October 29, 2016

Friday, September 9, 2016

Short Takes

73 Syria aid groups suspend cooperation with U.N.

Wells Fargo hit with $185 million in fines for setting up fake accounts.

NASA launches probe to bring back pieces of an asteroid.

Car with gas cylinders near Notre Dame in Paris baffles police.

Dozens stuck overnight at 10,000 feet in the air over the Alps.

FAA issues warnings about Samsung smartphones on planes.

Friday, September 2, 2016

Friday, August 12, 2016

Tuesday, July 5, 2016

Saturday, June 18, 2016

Wednesday, June 8, 2016

Short Takes

Primary results from California, New Jersey, North Dakota, South Dakota, New Mexico, and Montana.

President Obama met with Indian Prime Minister Modi to discuss, among other things, climate change.

Syrian leader Assad vowed to retake all of the land held by armed rebels.

Stephen Hawking says black holes are not “the eternal prisons,” meaning some things might make it through.

Colin has gone post-tropical and is heading out to sea.

The Tigers beat the Blue Jays 3-2 in 10.

Saturday, May 21, 2016

Monday, February 29, 2016

Short Takes

Reformists make gains in Iranian elections.

Seriously, Donald Trump doesn’t know who David Duke is?

Suspect in Virginia cop killing is identified as a Pentagon sergeant.

Air strike targets suspected ISIS convoy in Libya.

SpaceX scrubs third launch attempt this week.

And the Oscars went to…

Friday, February 12, 2016

Making Cosmic Waves

This is amazing.

A team of scientists announced on Thursday that they had heard and recorded the sound of two black holes colliding a billion light-years away, a fleeting chirp that fulfilled the last prediction of Einstein’s general theory of relativity.

That faint rising tone, physicists say, is the first direct evidence of gravitational waves, the ripples in the fabric of space-time that Einstein predicted a century ago. (Listen to it here.) It completes his vision of a universe in which space and time are interwoven and dynamic, able to stretch, shrink and jiggle. And it is a ringing confirmation of the nature of black holes, the bottomless gravitational pits from which not even light can escape, which were the most foreboding (and unwelcome) part of his theory.

More generally, it means that a century of innovation, testing, questioning and plain hard work after Einstein imagined it on paper, scientists have finally tapped into the deepest register of physical reality, where the weirdest and wildest implications of Einstein’s universe become manifest.

Conveyed by these gravitational waves, power 50 times greater than the output of all the stars in the universe combined vibrated a pair of L-shaped antennas in Washington State and Louisiana known as LIGO on Sept. 14.

If replicated by future experiments, that simple chirp, which rose to the note of middle C before abruptly stopping, seems destined to take its place among the great sound bites of science, ranking with Alexander Graham Bell’s “Mr. Watson — come here” and Sputnik’s first beeps from orbit.

“We are all over the moon and back,” said Gabriela González of Louisiana State University, a spokeswoman for the LIGO Scientific Collaboration, short for Laser Interferometer Gravitational-Wave Observatory. “Einstein would be very happy, I think.”

Members of the LIGO group, a worldwide team of scientists, along with scientists from a European team known as the Virgo Collaboration, published a report in Physical Review Letters on Thursday with more than 1,000 authors.

“I think this will be one of the major breakthroughs in physics for a long time,” said Szabolcs Marka, a Columbia University professor who is one of the LIGO scientists.

“Everything else in astronomy is like the eye,” he said, referring to the panoply of telescopes that have given stargazers access to more and more of the electromagnetic spectrum and the ability to peer deeper and deeper into space and time. “Finally, astronomy grew ears. We never had ears before.”

From Close Encounters of the Third Kind after the aliens return people who haven’t aged after being gone thirty years:

Scientist 1: Einstein WAS right!

Team Leader: Einstein was PROBABLY one of them!