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Source: blogs.physicstoday.org --- 22 days ago
Science : To date, 307 extrasolar planets have been discovered and 29 multipleplanet systems have been discovered. The masses of the planets range from a few Earth masses up to several Jupiter masses, with orbital periods ranging from slightly over 1 day to several years. Unlike in our solar System, the orbital eccentricities of the extrasolar gas giant-sized planets may be large. In Science magazine, Edward W. Thommes, Soko Matsumura and Frederic A. Rasio describe how the range of periods, the eccentricities, and the diversity of the Planetary systems have challenged the theories of planet formation , and propose an explanation--in terms of properties of the protoplanetary gas disk--of how this diversity may arise. ... Source: www.fwicki.com --- 23 days ago
If conditions had been slightly different when our solar System was formed, the Earth might have been engulfed by the sun or flung into deep space. A new, large-scale computer simulation that traces how Planetary systems are born shows just how ... ... Source: deoxy.org --- 10 days ago
... Source: www.mercurytoday.com --- 28 days ago
Data from MESSENGER's first flyby of Mercury have been released to the public by the Planetary Data System (PDS), an organization that archives and distributes all of NASA's Planetary mission data. ... Source: www.fwicki.com --- 24 days ago
Data from MESSENGER's first flyby of Mercury have been released to the public by the Planetary Data System , an organization that archives and distributes all of NASA's Planetary mission data. ...
Source: space.about.com --- 14 days ago
Earth - Pictures and Astronomy Facts - Solar System Planetary Astronomical Data and Images of Earth. Earth. Astronomy Guide to Space exploration close to home. Information on our solar System. Earth Planetary data and graphics. ... Source: www.moreover.com --- 28 days ago
Our solar System is a Goldilocks among Planetary systems. Conditions have to be just right for a disc of dust and gas to coalesce into such a set of neatly ordered planets, a new computer model suggests. ... Source: slashdot.org --- 3 days ago
Iddo Genuth writes "Research conducted by a team of North American scientist shows our solar System is special, contrary to the accepted theory that it is an average Planetary System. Using computer simulations to follow the development of planets, it was shown that very specific conditions are needed for a proto-stellar disk to evolve into a solar System-like Planetary System. The simulations show that in most cases either no planets are created, or planets are formed and then migrate towards the disk center and acquire highly elliptical orbits." The research was published in Science magazine; here's the paper on ArXiv (PDF). Read more of this story at Slashdot. ... Source: www.guardian.co.uk --- 3 days ago
Artificial clouds to reflect away sunlight, creating colossal blooms of oceanic algae and the global use of synthetic carbon-neutral transport fuels are just three of the climate transforming technologies in need of urgent investigation, according to leading scientists. The eminent group argue that, with governments failing to grasp the urgent need for measures to combat dangerous climate change , radical – and possibly dangerous – solutions must now be seriously considered. The idea of engineering on a Planetary scale in a bid to control climate has been around for more than 50 years but, to date, has remained on the fringes. The potential for dramatic and beneficial change has hitherto been outweighed by the risk of unexpected side-effects in the complex climate System, with global consequences . Now, in a special edition of the journal Philosophical Transactions of the Royal Society , climate scientists and engineers have brought together the latest research and issued a call for a far-reaching assessment of a raft of geoengineering techniques. "We are now, or soon will be, confronting issues of whether, when and how to engineer a climate that is more to our liking," argues Ken Caldeira, a leading climate scientist based at the Carnegie Institution in Stanford, California. If a decision is made to move ahead with climate engineering, he says, then it will be essential to understand the point at which the risks and costs of geoen ... Source: www.guardian.co.uk --- 3 days ago
Tinkering with our entire Planetary System is not a silver bullet. It's an expression of political despair, writes Greenpeace's Doug Parr ... Source: gizmodo.com --- 23 days ago
Hubble, without a doubt the most spectacular digital camera in the solar System, has completed its 100,000th orbit. To celebrate, scientists pointed the telescope to NGC 2074, a spectacular star birthplace 170,000 light-years away, right next to the Tarantula nebula, where Ming of Mongo is probably building a weapon of mass destruction. Like always, the image—taken with the Wide Field Planetary Camera 2—is breathtaking, especially the high resolution version: I feel tiny. For a project that has been dying for the last few years, this telescope keeps being one of the most successful NASA projects in history. Let's hope the James Webb works as well. [ NASA ] ... Source: www.space.com --- 28 days ago
Violence defines Planetary creation, but our solar System seems surprisingly calm. ... Source: www.sciencedaily.com --- 28 days ago
Prevailing theoretical models attempting to explain the formation of the solar System have assumed it to be average. Now a new study by Northwestern University astronomers -- the first to model the formation of Planetary systems from beginning to end -- illustrates the solar System is pretty special. Their results show that the average Planetary System's origin was violent but that the formation of something like our solar System required conditions to be "just right." ... Source: upcoming.yahoo.com --- 18 days ago
'Cosmic Collisions' reveals the explosive encounters that shaped our solar System, changed the course of life on earth and continue to transform our galaxy and universe today. Images from space and visualizations based on cutting edge scientific data showcase catastrophic Planetary meetings, the merging of massive galaxies and the continual explosions that occur in the center of the Sun. ... Source: upcoming.yahoo.com --- 33 days ago
'Cosmic Collisions' reveals the explosive encounters that shaped our solar System, changed the course of life on earth and continue to transform our galaxy and universe today. Images from space and visualizations based on cutting edge scientific data showcase catastrophic Planetary meetings, the merging of massive galaxies and the continual explosions that occur in the center of the Sun. ... Source: www.sciam.com --- 9 days ago
Planetary Protection RacketAs the first planet to form in our solar System, Jupiter helped to sculpt the rest [see “The Genesis of Planets”; SciAm, May 2008]. Because of its gravity, for instance, it has regulated the rate of cosmic impacts on Earth: flinging asteroids in our direction yet also clearing many hazardous space rocks out of our way. Jupiter’s net effect depends on its mass, suggest Jonathan Horner and Barrie Jones, both at the Open University in England, in an upcoming paper in the International Journal of Astrobiology. Had Jupiter one-fifth its mass, they calculate, it would have failed to clear asteroids out--and Earth might have been struck four times more often than it has been. But if Jupiter were still smaller, it would have flung fewer asteroids toward the inner solar System to begin with--and the dinosaurs might still be walking our planet. --George Musser [More] ... Source: www.uoguelph.ca --- 27 days ago
Prof. Ed Thommes will be featured on CBC Newsworld at 9 p.m. discussing his latest research, which found the creation of our orderly solar System was a rare occurrence that could only happen under peaceful conditions. The physics professor, along with two researchers from Northwestern University in Illinois, developed a new computer modeling method that simulates the birth of Planetary systems. Using this new computer simulation, the researchers discovered the birth of a Planetary System can be a violent situation. When planets are forming they fight for personal space causing many to get lost along the way, therefore, the creation of our sedate solar System was a unique situation. Thommes' research was published Aug. 8 in the prestigious journal Science and is making headlines around the world. CBC Newsworld features the top news stories and can be found in Guelph on channel 26. For more information on Thommes' research . ...
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Our solar System emerged in surprisingly good order from the violence of Planetary creation, according to a new simulation. ...
clipped by: klippety clipper's remarks: The difference is obvious between the two candidates. One speaks of human chances, the other about superiority and defense,etc etc Clip Source: www.Planetary.org John McCain, Republican Candidate for President For the past 50 years, space activities have contributed greatly to US scientific discovery, national security, economic development, and national innovation, pride and power (the ultimate example of which was the U.S. victory over the Soviets in the race to the moon). Spurred on by the Soviet Union's launch of Sputnik, the world's first satellite, and the concern that the U.S was falling behind in science and technology, U.S. policymakers enacted several policy actions to firmly establish the U.S. dominance in science and technology. Among them were the establishment of the National Aeronautics and Space Administration (NASA) and the national Defense Advanced Research Projects Agency (DARPA), increased research funding, and a reformulation of the nation's science and technology education System. ...
clipped by: tabsey clipper's remarks: There goes the escape route for Dick'n'George. Clip Source: www.dailygalaxy.com Three Northwestern University researchers have learned that our solar System in which the Earth orbits our sun is the exception in the Milky Way rather than the rule. "We now know that these other Planetary systems don't look like the solar System at all," said Frederic A. Rasio, senior author of the Science paper, and a theoretical astrophysicist and professor of physics and astronomy at Northwestern. "We now better understand the process of planet formation and can explain the properties of the strange exoplanets we've observed. We also know that the solar System is special and understand at some level what makes it special." Continue reading "Is Our Solar System a Rarity in Milky Way? Scientists Say "Yes"" » Tags: unique , and , we , wreck , it ...