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Showing posts with label NASA. Show all posts
Showing posts with label NASA. Show all posts

April 18, 2012

Astronomers discovered the asteroid 2012 HM who comes to Earth in April

The recently discovered asteroid 2012 HM neighbor happen to the Earth 1.5 times the distance of the Moon on April 28, reports the Program report Near Earth Objects (NEO) of NASA.

The object will pass 576 000 km from Earth at a sufficient distance that could eventually be affected by the gravity of the Earth or Moon.Its closest approach to the moon will be 375,000 miles the morning of April 28 after an hour and will approach the Earth to move away quickly.

The asteroid 2012 HM is about 50 to 100 meters and traveling at a speed of 6.44 km / s.The NEO studied by space objects, comets and asteroids are driven by the gravitational pull of planets in close orbits that allow them to enter the vicinity of Earth.

They are composed mainly of water ice with embedded dust particles.While comets are formed in the cold outer planetary system, most of the rocky asteroids have formed in a zone warmer inner solar system between the orbits of Mars and Jupiter.

The scientific interest in comets and asteroids is that they are a remnant material that has not undergone major changes in the process of formation of the solar system some 4.6 billion years.

One hypothesis is that the giant outer planets comoJúpiter, Saturn, Uranus and Neptune formed from an agglomeration of billions of comets and the remnants of this formation process are the comets we see today.
From this perspective posed by NEOs, asteroids today are the pieces left over from the initial agglomeration of the inner planets, including Mercury, Venus, Earth and Mars.

"Comets and asteroids offer clues to the chemical mixture from which the planets formed some 4.6 billion years. If we know the composition of the primordial mixture from which the planets were formed, then we must determine the chemical components of the remaining remnants of this formation process, comets and asteroids, "says NASA.

March 24, 2012

February 24, 2012

NASA warns that the clouds are closer to the earth's surface

                          Imagen de nubes captada por uno de los instrumentos de la sonda Terra de la NASA

The height of the clouds has decreased on average by one percent during the first decade of this century and this could have consequences for the global climate in the future.

Scientists at the University of Auckland, New Zealand, analyzed records of the height of the clouds from March 2000 to February 2010.

They used data from the radiometer spectrum multiple angles, multiangle Imaging Spectroradiometer, or MISR, one of the instruments aboard the Terra probe.

MISR was built by the Jet Propulsion Laboratory of NASA, or JPL Jet Propulsion Laboratory in Pasadena, California, and is one of five instruments aboard Terra. The instrument uses nine cameras at different angles to produce images of clouds around the planet, allowing to measure their height and movement.

The study, published in the journal Geophysical Research Letters, showed a decreasing trend in the height of the clouds.

Researchers found complex patterns, with decreases in height in some regions and increases in others. But globally, the average trend is a reduction in height.

Professor Roger Davies, one of the researchers, said that although the records do not cover a long enough time to show definitive changes, they do provide an indication that "something important could be happening."

Scientists will monitor the long-term cloud height to determine how significant are the changes to the temperature of the planet.

A consistent reduction in the height of the clouds could contribute to the loss of heat into space and reduce the temperature at the surface, which in turn could slow the effects of global warming.

June 18, 2011

The Comet Elenin may produce greatest meteor showers in history

The unusual Comet Elenin is expected to pass within 21 million miles of Earth on October 16, 2011 and speeding by at more than 85,000 mph—so fast it could travel from Earth to the Moon in less than five hours.

Discovered by amateur Russian astronomer Leonid Elenin in Lyubertsy, Russia on December 10, 2010—who accessed the International Scientific Optical Network's robotic observatory near Mayhill, New Mexico—the astronomical community has erupted with the excited possibility the celestial traveller could generate the most spectacular meteor showers ever recorded.

Although the comet's path is expected to change as it draws closer to the sun, astronomical calculations appear to show Elenin's perihelion occurring well inside Earth's orbit by September 5th.

Astronomers believe the comet will be visible with a good pair of field binoculars about the middle of August. After then it should become visible in the Northern hemisphere's predawn sky with the naked eye.

Comet watchers claim that the huge dust trail behind Elenin might become very bright with the tail glowing across the night sky.

The Earth is expected to pass through the giant tail, and the debris may generate fantastic meteor showers for as long as two and a half months.

Comet generates controversy and conspiracy theories:

Recently, a growing number of conspiracy theories have sprung up around the discovery of the long-period comet. Some are linking its appearance on the other side of the sun to the 9.0 earthquake that devastated northern Japan. Others believe it may fulfill the "prediction" some read into the end of the Mayan calendar on December 21, 2012.

A few, with private channels to unnamed professional sky watchers claim the comet's orbit is unstable and may encounter dark bodies such as the cometary debris known as the "Taurid objects." They go on to argue that Elenin carries a huge cloud of material with it and if the orbital path remains consistent the Earth will collide with that debris.

Of course, many astronomers anticipate that happening. It's why there would be astounding meteor showers after the comet's passing.

Elenin's orbital path seems to be constantly changing, however, as it falls inwards towards the sun. As one observer has noted, when Leonid Elenin discovered the comet calculations indicated it would pass by Earth at a distance almost nine times the distance of the Sun. Now, however, recalculations reveal that distance has significantly shrunk to as low as 0.15 AU.

Further perturbations in Elenin's orbital path may be affected by it's passage through the Oort belt—a huge halo of cometary bodies, giant asteroids and debris that encircles the outer solar system.

Villard points out that "The closest ever-recoded flyby of Earth was comet Lexell in 1770, which passed at 1.4 million miles. On Jan. 26th that year a magnitude 9.0 earthquake took place off the west coast of the North America."

Comets and earthquakes again. Could there really be a connection after all?

Although some insist there is a connection ["NASA's Website Accidentally Predicts Another Catastrophic Earthquake in 2011"] virtually all astronomers and geophysicists say no way.

So what can be expected? Well, if all goes right the greatest night time sky show seen in hundreds of years will occur.


The Sun will destroy all means of communication on Earth in 2013

A frightening forecast was published recently by experts of Space Agency NASA. According to American astronomers, in 2013, after years of hibernation, the Sun will wake up, and Earth will be threatened with unfortunate consequences.

Widespread outbreaks on the hot star can lead to a global failure of satellite communications. As a result, the planet is awaiting chaos.

In his report, Defense Secretary Liam Fox noted that the perfect electromagnetic storm will lead to a technogenic disaster on Earth. He reinforced his words with the recent statistics which indicates that the surface temperature of hot stars is rapidly increasing.

Solar storms will generate a great level of radiation that will affect the Earth's magnetic field. This could prove to be a collapse for the humanity - trains and planes will stop, GPS-navigation will be affected, mobile and radio networks will disappear.

As Liam Fox stressed in his address, the society is too dependent on technology, and this makes it very vulnerable. Natural protectors of Earth will simply not cope with the "riot" of the Sun, which will lead to the failure of all computers.

Also, due to solar activity banking system can be affected, The DailyMail reports.
Failures in electric power around the world can stretch from hours to several months. However, negative consequences of this outbreak can be minimized if we prepare for the collapse in advance.

Scientists have been investigating solar activity for 11 years. Previous years have been rather quiet. But, according to experts, this is the calm before this storm. Rings of fire, ready to escape from the surface of the Sun in the near future, are equal to a hundred hydrogen bombs in terms of power. If their destructive power reaches Earth, it will cause great economic losses. According to preliminary estimates, they will be 20 times greater than the damage from the famous Hurricane Katrina.

For information: solar flares are the most powerful of all manifestations of solar activity. The energy of a large solar flare reaches 1032 erg, which is approximately 100 times greater than the thermal energy that could be obtained by burning all known oil and coal reserves on Earth.

Strongest corpuscular flow perturbs the magnetic field of our planet, resulting in very fast and strong change its characteristics. Particles moving at speeds of 400-1000 km / s, reach earth's atmosphere within a day or two. This process is called magnetic storm.

It has long been known that solar flares provoke magnetic storms on Earth. In those days, doctors ask weather-sensitive people to be careful and avoid stress, both physical and emotional, because such cosmic phenomena increase the risk of cardiac diseases. It was observed that 13% of cases of myocardial infarction occur during magnetic storms.

Typically, these storms are accompanied by disturbances of the ionosphere, which in particular leads to interruptions in radio communication. Solar flares are a frequent and quite serious phenomenon. It is accompanied by a surge of electromagnetic radiation that can cause irreparable harm to our planet.


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