A “Completely Different Slant” on Solar System Formation

first_img51; “Did great balls of fire form the planets?” New Scientist asks.  A new theory “challenges the notion that the solar system started out as a placid sea of dust motes which simply clumped together to form planets.” If accepted, it “puts a completely different slant on what happened in the early solar system in the first 2 million years.”    Ian Sanders (Trinity College, Dublin) proposed that a nearby dying star with six times the mass of the sun sent asteroid-sized blobs of magma hurtling through the solar system.  Radioactivity kept the magma blogs molten.  This led to the formation of the enigmatic chondrules, which contain remnants of short-lived radioactive nuclides.  The colliding material also formed the building blocks of the planets.    Others find the idea intriguing but problematic.  The blobs should have differentiated into chemically distinct layers – not apparent in chondrules.  It also would impact beliefs about the origin and uniqueness of life.  PhysOrg quoted Dr. Maria Lugaro (Monash University), a member of the international team of astrophysicists who proposed the new theory.  “We need to know if the presence of radioactive nuclei in young planetary systems is a common or a special event in our galaxy because their presence affected the evolution of the first large rocks (the parent bodies of asteroids and meteorites) in the solar system,” she said.  “These are believed to be the source of much of earth’s water, which is essential for life.”This completely different slant is pretty oblique, all right.  So now Neil Armstrong and Buzz Aldrin should just accept the notion that, 40 years ago, they were starstuff walking on starstuff, just globs of protoplasm walking on old solidified globs of lava.  Assuming the hallmark of humanness is rationality, that sounds like one giant leap backwards for mankind.    While it’s nice to see some daring new thinking outside the box in science, this idea seems highly contrived.  The evolutionists probably won’t like it.  It makes the origin of the earth much more unlikely, for one thing.  For another, it tends to falsify the long-taught belief that dust accretion is sufficient to build planets.  But where is the evidence for a nearby large star in the right position with the right amount of material to seed our sun with planetary building blocks when they were needed?  How convenient to bring in the material by just-in-time special delivery.  Let’s ask the logical follow-up question.  Where did the dying star get its asteroid-sized blobs, if accretion is no longer in vogue?    “Great balls of fire” belongs in a rock concert, not a science lab.  This proposal should call into question whether imagining “notions” after the fact is really scientific.  Are scientists supposed to be sitting around inventing notions? (notion, n.: vague or imperfect conception or idea of something; a fanciful or foolish idea; whim).  You thought science was about testing theories with evidence.  The notion in this story amounts to little more than an ad hoc speculation concocted to save the old notion from anomalies.  There’s an ad hoc here and an ad hoc there, here a hoc, there a hoc, everywhere an ad hoc.  One doesn’t normally add hawks to the science farm.  If Old MacDonald Observatory ever hawks this theory, they should quickly hear some philosophical moos and oinks from the sentient animals.(Visited 17 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

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Iniesta the perfect poster boy for new generation

first_imgPrimera División Iniesta the perfect poster boy for a new generation of talents at Barca Ben Hayward Last updated 1 year ago 19:00 5/20/18 FacebookTwitterRedditcopy Comments(0) Andres Iniesta Barcelona Getty Images Primera División Barcelona v Real Sociedad Real Sociedad Barcelona The midfielder, who will play his last game for the Catalan club on Sunday, has called for the Blaugrana to put their faith in La Masia Andres Iniesta’s time at Barcelona is about to end. The news that all of the club’s fans did not want to hear became reality in late April as the player confirmed his departure in a tearful press conference.The start of a long and painful goodbye had come in the final of the Copa del Rey, when the midfielder signed off with a goal and a vintage display, before leaving the pitch to an ovation from fans of both Barca and Sevilla.On the way off, he had embraced several of his team-mates and he then sat on the bench for a few minutes, emotion etched on his face as tears flowed down his cheeks. And shortly afterwards, he returned to lift the trophy following a comprehensive 5-0 win. Article continues below Editors’ Picks Goalkeeper crisis! Walker to the rescue but City sweating on Ederson injury ahead of Liverpool clash Out of his depth! Emery on borrowed time after another abysmal Arsenal display Diving, tactical fouls & the emerging war of words between Guardiola & Klopp Sorry, Cristiano! Pjanic is Juventus’ most important player right now After the game, he refused to confirm his departure, but said he would speak soon, and with the whole squad given most of the week off, the following Friday was the time to announce his decision to the world.Flanked by family, friends, the Barca board and most of his team-mates (Luis Suarez and Lionel Messi, the latter due to a passport issue, were notable absentees), he revealed his reasons for walking away this summer.”I don’t want to fool myself or fool anybody,” he said. “I’m 34 years old (actually he was still 33 at the time) and I know that everything would be more difficult. It’s a rule of life. Other challenges come and I will try to be as happy as I have been here.”Clearly, it was a difficult decision. “It is a really hard day for me,” he said of his imminent exit and move (probably to play in China or Japan, although it is still unconfirmed). “Because I have been here my whole life. Saying goodbye to what has been my home and my life is really complicated. But I understand that what comes next is even more complicated and difficult.”I could never forgive myself for making an uncomfortable situation at a club that has given me everything. That would not be fair on me and it would not be fair on the club.”Iniesta trophies graphicIniesta had signed a “lifetime” contract at Barca in October, but he had doubts back then and has chosen to leave on a high, still performing at the top level and with a domestic double set to be sealed this weekend as the Catalans close in on La Liga.The player broke down several times as he annpunced his decision to leave and especially as he thanked his parents and his sister, also present, remembering how he had arrived a shy kid 22 years ago, and his wife and “three treasures”, who were also in the room to watch his farewell press conference.There was also a message for the club. “Succeeding here was ingrained in my head,” he said. “It was a bit tough at first but it didn’t matter. The club should be aware of the value of the youth system. They are working well.”Xavi Andres Iniesta Barcelona“Andres eats at a different table,” Guardiola once said early on in his tenure as Barca boss. “He’s an example. I always says he’s an example for the youth players. They should look at him: he doesn’t wear ear rings, he doesn’t dye his hair.”He plays 20 minutes and he doesn’t complain. Wherever you play him, he doesn’t complain. And he always plays well, and he always trains well. And when he is injured, he is in a bad mood because he wants to come back and help the team. For Barca to have a player like him is priceless.”It has been and as Andres prepares to bow out on Sunday, nothing will be quite the same again. But Guardiola is right: just as Pep himself was back in the day, Iniesta is the perfect poster boy for a new generation of talents at La Masia. He can only hope the club gives them a chance.last_img read more

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