Exoplanets Are Young, Too

first_imgObservations cause a major upset in planet formation theory, and the time needed for evolution.Two days ago, we reported the evidence for youth in Saturn’s rings and moons (19 Dec 2018). A new report from Science Magazine extends this youth out to the planets around other stars. Daniel Clery, in his article “Hints of young planets puzzle theorists,” gives observational evidence that the long-standing “core accretion” model for planet formation is wrong. At least 20 exoplanets have dust disks that can’t be as old as expected. Keep in mind that planetary scientists still make ‘reckless drafts on the bank of time’ (2 July 2007) as do the geologists, tossing around millions and billions of years like politicians with OPM (other people’s money). In this quote, Clery sounds like a politician realizing there’s not enough revenue for his favorite program.HL Tau, a mere stripling of a star no more than 1 million years old, was swaddled in a surprise. Four years ago, the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile revealed gaps in a bright disk of dust around HL Tau—apparently swept clean by unseen planets that had formed millions of years earlier than astronomers thought possible. But now, an ALMA survey of 20 disks around nearby young stars suggests the precocious planets around HL Tau are no anomalies—a result that will keep theorists busy for years.There aren’t enough cloths to swaddle the baby. How big a surprise is this? Clery quotes an astronomer:“It’s spectacular,” says Joshua Winn of Princeton University. “We will never think about disks in the same way.”The findings appear to falsify the favored core accretion theory. “The process is expected to be slow, taking millions of years to play out.” These exoplanets are too young for that. Many of the cleared lanes are farther out than Neptune is from the sun, Clery says, adding to the problem, because there should be a paucity of dust at those distances.Planetary Science: the myth that dust bunnies turn into real bunnies, given billions of years.The evidence takes away support for core accretion theory and hands it to the “heretical” theory called disk instability. How fast is that process?An alternative model relying on unstable ripples or clumps in the disk that collapse under their own gravity can make planets faster, especially large ones in distant orbits. But Marco Tazzari, of the Institute of Astronomy at the University of Cambridge in the United Kingdom, notes that the survey found few spiral arms—signs of disk instabilities—in the disks. “There are many structures we cannot account for,” he says.The astronomers only see the lanes cleared of dust, not any planets themselves. Their proposed solution? Futureware. “To untangle these issues, astronomers need additional observations,” Clery writes. At least they are looking now, instead of just modeling. Clery’s article illustrates the latest revision of Murphy’s Law: “Anything that can go wrong has already gone wrong.” Scientists are just finding it with the ALMA Telescope. It also illustrates H. L. Mencken’s conjecture, “For every complex problem there is an answer that is clear, simple, and wrong.”Both theories, therefore, don’t seem to work. And what about the rocky, inner planets? Disk instability is not as helpful in those cases.Ashes to Ashes and Dust to DustAt New Scientist, Leah Crane demoted our planet by saying, “Earth may be made up of rocks blasted by gusts of solar wind.” Don’t you feel better now? Our response should be, “If you say it MAY be, it also MAY NOT be. How do you know?” She sings the old Bob Dylan ballad, “The answer, my friend, is…’The solar wind consists of ions, not rocks.Earth may have started as dust in the wind. Unlike in many other stellar systems we’ve seen, the area close to our sun is empty. That may be because early in the solar system’s formation, the solar wind blew rocks near the sun into the area where Mercury, Venus, and Earth eventually formed.That’s odd; we know a lot about the solar wind, and our sun isn’t blowing chunks these days. For cover, Crane runs to Christopher Spalding at Yale University, who has a “simulation.” If you start with the right size pebbles, he says, and if the sun was more active in the past, and if Jupiter contributed its gravity – then rocks 100 meters and smaller “may have acted as building blocks for these rocky worlds.” They “may have,” he says, but he’s cheating. Getting dust to grow into pebbles by accretion is one of the big hurdles in planet formation theories (28 June 2018). At least the ALMA team had observations, not just simulations.Readers, please realize that secular astronomers believed the core accretion model for decades. And before that, textbooks routinely taught the planetesimal hypothesis. And centuries before that Laplace presented the nebular hypothesis, for which he famously told Napoleon it had no need of God. Well, now we have telescopes that fail to confirm it, and the recent “alternative hypothesis” of disk instability isn’t looking too good, either. Let’s put the findings together in a logical way. If exoplanets form quickly, then Saturn formed quickly. If Saturn’s rings and moons are young, then Saturn is young. If Saturn is young, the solar system is young. If the earth is young, then Charlie & Charlie* were wrong; life must have been created. Tell me, theistic evolutionists, why you feel so compelled to abandon Genesis and desire the company of people who keep turning out to be wrong? Don’t you believe Psalm 119:99? “I have more understanding than all my teachers, for Your testimonies are my meditation.”*Lyell, Darwin.Recommended resources: Michael Denton is neither a Christian nor a creationist, but his recent books The Wonder of Water (see the video), and Children of Light (hear his podcast) make a compelling case that our universe, our star, and our planet were intended for beings like us. Isaiah said as much long ago. “For thus says the Lord, Who created the heavens, Who is God, Who formed the earth and made it, Who has established it, Who did not create it in vain [i.e., by random forces or the Stuff Happens Law], Who formed it to be inhabited: “I am the Lord, and there is no other” (Isaiah 45:18).For your amusement, here are some Murphy’s Laws that seem appropriate to the story:If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong.If you perceive that there are four possible ways in which something can go wrong, and circumvent these, then a fifth way, unprepared for, will promptly develop.If anything simply cannot go wrong, it will anyway.Whether things can go wrong or not, it depends on your frame of reference. Regardless of your frame of reference, things will go wrong anyway.Two wrongs don’t make a right. It usually takes three or four.If your action has a 50% possibility of being correct, you will be wrong 75% of the time.Anything that can’t possibly in a million years go wrong, will go wrong.The probability that something can go wrong is directly proportional to the square of the amount of inconvenience it can cause you.The only time something’s right is when everyone agrees its wrong. (Visited 594 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

Continue reading

Buy local to build South Africa’s economy

first_imgLeslie Sedibe will feature on the next instalment of Brand South Africa’s Play Your Part TV series, to air on Sunday 24 August on SABC2 at 9pm Proudly South African launched the Ubuntu Schools Campaign against sexual violence and bullying in schools in 2012. If anything, the campaign has shown a pressing need for guidance, mentorship, vision, discipline and encouragement in schools. (Image: Proudly South African)• Leslie SedibeCEOProudly South African+27 11 327 7778info@proudlysa.co.zaMelissa Jane CookSocial cohesion will only come on the back of economic success, says Leslie Sedibe, the chief executive of Proudly South African. The country faces massive challenges of unemployment, poverty and growing inequalities, he points out. The simplest solution is to buy local as this will grow the economy and increase jobs.Sedibe is an advocate, and holds a BA, LLB and LLM (Tax) from Wits University. Before joining Proudly South African, he was heavily involved in the football World Cup in South Africa in 2010. He was the head of legal of the 2010 FIFA World Cup Local Organising Committee; during the championship he was the chief executive of the South African Football Association (Safa), and chairperson of the National Rights Protection Programme.In addition, he was on the boards of Safa and the Local Organising Committee. Other boards on which Sedibe has served include EMI and the SABC. He was the deputy chairman of the Film and Publication Board and chaired the board of the Recording Industry of South Africa and the South African Music Awards, or Samas. Added to his business acumen, he is a passionate activist and introduced the Ubuntu Schools Campaign against sexual violence and bullying in schools.Proudly South AfricanThis project is about national identity and the need to encourage people to buy South African goods, Sedibe says. “This job’s not just about patriotism; it’s about investing in the country, about job creation.” Buying local will boost the economy and, in turn, job creation.Sedibe’s main task is to ensure that South Africans are proud of that which makes this country great. If it were up to him, he would introduce a rule that compelled South Africans to buy local every time they shopped, particularly for clothing. He laments that thousands of people lost their jobs in the textile industry partly because a number of South Africans chose to buy imported designer labels. But he believes the campaigns he leads at Proudly South African will go a long way in educating South Africans about the importance of choosing locally produced goods and services.His first task at Proudly South African was to reposition the brand and ensure that more South Africans understood its ethos. To achieve this, he set himself four goals: to ensure more South Africans buy local; to ensure the country produces quality products; to campaign for fair labour standards; and to protect the environment.Lesley Sedibe reminds South Africans to embrace Brand SANeed for jobsFirst conceived at the Presidential Job Summit in 1998, the Proudly South African campaign was born out of a socio-economic need to create jobs, under the leadership of Nelson Mandela. Mandela was the president of the country at the time. Through the National Economic Development and Labour Council (Nedlac), the campaign was launched in 2001 and supported by the government, organised business and labour. It promotes national pride, patriotism and social cohesion.“I think that South Africa needs more and more people to dedicate themselves and their lives to better position South Africa. One of the things that really strongly influences me is what Madiba spoke about in parliament after 10 years of democracy. He said his wish for South Africa was that South Africans should never give up on the belief in goodness,” Sedibe says.Under his leadership, Proudly South African has been vigorous in its “buy local” campaign and many seem to be heeding the call. The campaign seeks to promote South African companies, products and services which are actively helping to create jobs and economic growth.“What we really need as South Africans [is] to speak well and positively about our country. There’s a very good reason for that. I think we need to be very careful as South Africans about what we say about our country because you could be the only person that the world will interact with to know South Africa. If you say negative things about South Africa then people will have a negative view [of] South Africa.”Sedibe is adamant South Africans will never see the value of a South African product unless they have pride in who they are and their creativity.Ubuntu Schools CampaignProudly South African launched the Ubuntu Schools Campaign against sexual violence and bullying in schools in 2012. If anything, the campaign has shown a pressing need for guidance, mentorship, vision, discipline and encouragement in schools. “The Ubuntu Schools Campaign is a direct response to the level of violence that happens in our schools and communities, particularly issues around sexual violence and bullying within schools. There are issues that the Ubuntu Schools Campaign seeks to address.”The aim of the project is to drive home the message to the youth that abuse and violence are not acceptable, he explains. “We owe it to the generations who went before us to make this country a better place for all who live in it. And we certainly owe it to the generations of South Africans to come. We owe it to ourselves and our fellow countrymen and countrywomen to live out the principles of ubuntu. We need to get back to basics and learn, teach and practise humanity, respect, humility, kindness, love and self-control.”last_img read more

Continue reading

D-League: Che-Lu-San Sebastian whips Go for Gold for back-to-back wins

first_imgMichael Calisaan also notched a double-double with 13 points and 10 boards to guide the Revellers to their fourth win in seven games.“We’re more prepared this time out,” said coach Stevenson Tiu as his side moved to fifth place with its 4-3 card.FEATURED STORIESSPORTSWATCH: Drones light up sky in final leg of SEA Games torch runSPORTSLillard, Anthony lead Blazers over ThunderSPORTSMalditas save PH from shutoutChe’Lu-San Sebastian set the tone early in the game, going on a 15-2 start before punishing Go for Gold for its 25 turnovers which led to 33 easy points for the Revellers.Despite coming out on top, Tiu isn’t resting on his laurels knowing the remaining four games remain crucial for his team’s chances in the playoffs. PH billiards team upbeat about gold medal chances in SEA Games PLAY LIST 03:07PH billiards team upbeat about gold medal chances in SEA Games00:50Trending Articles00:50Trending Articles01:29Police teams find crossbows, bows in HK university01:35Panelo suggests discounted SEA Games tickets for students02:49Robredo: True leaders perform well despite having ‘uninspiring’ boss02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City MOST READ Globe Business launches leading cloud-enabled and hardware-agnostic conferencing platform in PH Brace for potentially devastating typhoon approaching PH – NDRRMC “We’re still not safe. There’s still a lot that can happen. So that’s the challenge for our guys to make it to the quarterfinals,” he said.Justin Gutang paced the Scratchers (2-3) with 12 points and six rebounds in the loss.The Scores:CHE’LU BAR AND GRILL-SAN SEBASTIAN 87 — Bulanadi 15, De Leon 14, Calisaan 13, Collado 11, Ilagan 8, Batino 6, Faundo 4, Capobres 3, Jeruta 3, Siruma 3, Santos 2, Costelo 0, Lao 0.GO FOR GOLD 65 — Gutang 12, Salem 11, Haruna 9, Domingo 8, Alejandro 5, Ocampo 3, Pasturan 3, Young 3, Gaco 2, Leutcheu 2, Naboa 1, Casiño 0, Pili 0.ADVERTISEMENT AFP official booed out of forum Don’t miss out on the latest news and information. 2 ‘newbie’ drug pushers fall in Lucena sting Slow and steady hope for near-extinct Bangladesh tortoises Typhoon Kammuri accelerates, gains strength en route to PH John Lloyd Cruz a dashing guest at Vhong Navarro’s wedding Photo by Tristan Tamayo/ INQUIRER.netChe’Lu Bar and Grill-San Sebastian coasted to its first back-to-back wins in the 2018 PBA D-League Aspirants’ Cup, shutting down Go for Gold, 87-65, Tuesday at Marikina Sports Center.Allyn Bulanadi scattered 15 points and three rebounds, while Samboy de Leon went 3-of-4 from downtown to wound up with 14 markers.ADVERTISEMENT LATEST STORIES View comments Quarters: 17-12, 39-29, 58-42, 87-65. NEXT BLOCK ASIA 2.0 introduces GURUS AWARDS to recognize and reward industry influencers Read Next American triumph and disappointment in Olympic ice dancelast_img read more

Continue reading

Mangeshkar sisters to be awarded Tana-Riri Sangeet award

first_imgLata MangeshkarNoted playback singer Lata Mangeshkar and her sister Usha will be awarded the Tana-Riri Sangeet Sanman Award today for their contributions in the field of music.The Gujarat government has instituted this award to mark the golden jubilee celebration of the two-day Tana Riri festival this year, Bhagyesh Jha, Youth & Sports Secretary, told PTI.The festival is organised every year in the memory of Gujarat’s classical music duo Tana and Riri.The award will be presented to Usha Mangeshkar by Chief Minister Narendra Modi. However, Lata will not be present at the occasion, Jha said.Beside the Mangeshkar sisters, Dhari Panchamda, who began her record-breaking classical music endeavour near the tomb of Tana-Riri in Vadnagar on November 11, will also be honoured for completing singing about 109 ragas for 99 hours, 99 minutes and 99 seconds this afternoon, Jha said.”Dhari’s world record will be the truest tribute to Tana and Riri,” state Cultural Minister Fakirbhai Vaghela said.last_img read more

Continue reading