Create An Asteroid Killed The Dinosaurs Can Not Be Guilty

Monday, October 17, 2011

The new space, and have questioned the identity of the asteroid, which led to the extinction of the dinosaurs.

The current theory is that a large asteroid called Baptistina collided with another stone, the construction of huge fragments of the solar system.

One of these fragments are believed to have come to Earth 65 million years ago, wiping out the dinosaurs.

But new information on the telescope of NASA, the term Wise Baptist fragments are too young.

The asteroid Baptistina candidate, believed to have collided with another asteroid in the "main belt" between Mars and Jupiter, about 160 million years.

Huge fragments of rock, remnants of this collision, scattered around the main asteroid belt, and some are believed to have been ejected from the earth, causing a mass extinction of life when it affected 65 million years.

The researchers initially identified as a Baptist, the source of this fragment, using an estimate of the information collected in visible light telescopes on the ground.

Make estimates of the size and age are difficult to do with the sunlight just reflects, however, and if NASA scientists used infrared emission of asteroids, as measured by the explorer wide field of Infrared investigation, to recalculate the sizes and ages of thousands of asteroids in the Solar System.

This new, more precise data suggest that Baptistina not break until about 80 million years, giving it less time to get to Earth.

Planetary Ball bat

The effect of a stretch of 10 km wide asteroid has left its mark on the Chicxulub crater in Mexico great, and a deposit of fine ash and rare elements in the geological record in the world 65 million years.

The effect coincided with the extinction event of the Cretaceous-Tertiary (KT), so the loss of approximately 75% of all species on Earth, including dinosaurs.

Dr. Amy Mainzer, principal investigator on Neowise (Near-Earth Wise observations) project at the Jet Propulsion Lab (JPL) in California, said that "the estimate of the age and origin of asteroids will help us to correlate events on Earth and impact craters on the moon with what is happening in the solar system. "

Previously, estimates of age of the asteroids were the size of the object and how it is reflective, in-depth analysis of asteroids is generally thought to be younger.

The size of an object in space has traditionally been measured by looking at the amount of sunlight is reflected from it.

But this method has many problems. As the Moon, asteroids may wax and wane, depending on their position relative to the Sun. Dark like bricks of charcoal-also reflect less light than bright icy objects.

These problems can combine to make the estimates inaccurate size and age.


Wise, a telescope rather than looking infrared light can be achieved by space rocks, which is related to the temperature of the object.

Infrared light is emitted by all objects, even if they are dark, allowing a more precise estimate of its size and therefore age.

Dr. Mainzer said: "We have collected information about 120 000 asteroids, and this helps us to learn to belt up."

Critical Baptistina family of asteroids - those that were formed when large asteroids destroyers entered the main belt - was formed only about 80 million years.

This gives the rock dinosaurs kill only 15 million years ago and moved to a suitable place to be ejected from the main belt and travel to Earth at the time of the impact 65 million years.

Scientists believe that it would take an asteroid about 10 million years traveling the main belt to Earth, so "this does not give a Baptist, a fragment of a lot of time to reach a suitable place," said Dr. Mainzer .

"The jury is still out, and we have not completely excluded Baptistina."

After a relatively recent version of data Wise Telescope in April this year, teams will have the Jet Propulsion Laboratory of NASA's "treasure" of information with.

Dr. Mainzer expect the calculations, simulations and models based on such data "will keep people busy for decades."

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