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BBC Asteroid Impact Simulation End Of The World Predictions
A huge asteroid with a diameter of 500 Kilometer is going to impact on Earth! Destination: Pacific Ocean. The asteroid impact peels 10 kilometers crust off the surface of Earth. The resulting shockwave travels at hypersonic speed. The debris from the impact is blasted to the lower orbit of Earth, and they returns to destroy everything on the planet. The firestorm created by the asteroid impact encircles the Earth,
vaporizing everything in our world. Within 24 hours of asteroid impact, the entire Earth will be uninhabitable. The researchers have found that this scenario has happened 6 times in Earth's history.
ScienceCasts Why the World Didnt End Yesterday
music Why the World Didn't End Yesterday, presented by Science@NASA Dec. 22, 2012: If you're watching this tutorial, it means one thing: The World Didn't End Yesterday. According to media reports of an ancient Maya prophecy, the world was supposed to be destroyed on Dec. 21, 2012. But look around you. 'The whole thing was a misconception from the very beginning,'
says John Carlson, director of the Center for Archaeoastronomy. 'The Maya calendar did not end on Dec. 21, 2012, and there were no Maya prophecies foretelling the end of the world on that date.' The truth, he says, is more interesting than fiction. Carlson is a hardnosed scientist a radio astronomer who earned his degree studying distant galaxies. He became interested in the 2012 phenomenon 35 years ago when he attended a meeting of the American Association for the Advancement of Science
and learned about the Maya. Where the rain forests of Mesoamerica now stand, a great civilization once flourished. The people of Maya society built vast cities with a population density comparable to modern Los Angeles County. They mastered astronomy and developed an elaborate written language. Most impressive, to Carlson, was their expansive sense of time.
'The times Mayas used dwarf those currently used by modern astronomers,' he explains. 'According to our science, the Big Bang occurred 13.7 billion years ago. There are dates in Mayan ruins that stretch back a billion billion times farther than that.' The Maya Long Count Calendar was designed to keep track of such long intervals. 'It is the most complex calendar system ever developed.' Written using modern typography,
the Long Count Calendar resembles the odometer in a car. Because the digits rotate, the calendar can 'roll over' and repeat itself; this repetition is key to the 2012 phenomenon. According to Maya theology, the world was created 5125 years ago, on a date we would write 'August 11, 3114 BC.' At the time, the Maya calendar looked like this: 22.214.171.124.0
On Dec. 21, 2012, it is exactly the same: 126.96.36.199.0 In the language of Maya scholars, '13 Bak'tuns' elapsed between the two dates. This was a significant interval in Maya theology, but, stresses Carlson, not a destructive one. None of the thousands of ruins, tablets, and standing stones that archeologists have examined
Why Did NASA Crash A Satellite Into Mercury
Occasionally, NASA makes the news not becausethey did something super inspirational or fantastic or crazy cool amazing, but becausepeople just don't get it. This is one of those times. Howdy partners, this is DNews, thanks forcoming by! I'm Trace Dominguez. Mercury is the innermost planet in our solar system,it's both hot and cold, and it's zipping around the sun every 88 days but to be honest,we don't know as much about it as we'd like. So NASA launched Messenger in 2004 to exploreit it arrived in 2011, and has been orbiting ever since. It's learned about volatile compoundson the planet, its magnetic field, that there
is ice in the shadowed craters, and aboutthe ancient tectonic and volcanic systems that shaped the planet; among other things.But now, this week. TODAY. About an hour ago, in fact; Messenger crashed into Mercury. Onpurpose. Messenger hit the planet going 12 times thespeed of sound with the force of a semitruck going 300 mph (483kph), and will leave a craterthe width of a basketball court. Every month or two, Mercury is hit by a meteor about thesame size as Messenger, going 10 times as fast; so it's not going to do real damage.Messenger was out of fuel, and was literally flying on fumes compressed helium whichwasn't designed to alter its course had been
MacGuyvered into the task to extend the sciencejust a BIT longer. But can you really learn something just by crashing into a thingé Apparently,yes! In this case, we won't know for a bitbut the crash might provide insight into what'sbeneath the surface of the planet, someday. This isn't the first probe crash by any means.Accidents DO happen, like in 1966, when humans made their first physical contact with anotherplanet as Russian probe Venera 3 crashed into Venus. It was supposed to land and measurethe atmosphere. But mostly, crashes are purposeful. Like when NASA purposely crashed SkyLab in1979, or in 2003, when Jupiter's Galileo probe purposely crashed into our largest planetafter a 14 year mission. Long before Galileo's
crash, it released a smaller probe which flewinto the atmosphere to test it for speed, composition, density and temperature. WhenGalileo hit those clouds the friction burned her up and the gravity and density crushedher but they did it on purpose. Galileo had learned there might be underground saltwater oceans on Europa! And if they simply allowed the spacecraft to orbit Jupiter, itcould crash into those oceans, contaminating them with Earth bacteria. That would be horrible,so instead they intentionally crashed it; and now are designing a potential Europa missionto explore those oceans. In 2005, NASA crashed into comet Tempel 1with a washingmachine sized probe named Deep
Impact. They hit at 37thousand kilometersper hour watching from an orbiter nearby to capture the science coming out of the probe.The scientists wanted to get quot;under the skinquot; of a comet and see what they're made of. Theimpact was quote quot;bigger than expectedâ€¦ it was like a mosquito hitting a 747.quot; Thiswhole mission had to be a string of quot;that's what she saids.quot; They spent months analyzingthe data from the crash, and were able to take pictures of the comet as the tiny probesmashed into its surface. Missions like this likely informed the RosettaPhilae comet missionfrom last year! And most recently, LADEE, and GRAIL's Ebband Flow have all crashed into the Moon. While
the crashes themselves don't always teachus much, you can't get data from a dead probe, after all. So why do we crash themé We canlearn by watching the explosions, studying the craters and tracking the results. Physicshas rules, and the more controlled variables we have in a crash the more we can learn.Personally, I think there's some theatrical ovation to crashing a probe. Voyager is doomedto fly forever, as a spaceborne time capsule to humanity, but for other, smaller probesâ€¦crashing is a way of saying, thank you for the knowledge you've given, now let's blowyou up in spectacular fashion! It seems a fitting and very final end for any mission.