Planet Gliese 581d Livable Ascertained

Gliese 581d, a rocky planet orbiting a giant red dwarf stars (stars with masses lower than the sun and the temperature below 4000 degrees Kelvin) is confirmed as the first planet that meets the requirements to accommodate life.

Planet which is about 20 light-years from Earth is one of our closest neighboring planet. He estimated temperature is warm enough and wet enough to cultivate a similar life-owned planet Earth.

Orbiting Gliese 581d in the Goldilocks zone (the area where possible life forms) belonging to the star Gliese 581. As is known, in the Goldilocks zone, the temperature not too hot, causing the water to boil or not too cold to make it freeze but it was in the right temperature so that water remains in liquid form.

"With a dense atmosphere of carbon dioxide will, which is the most probable scenario for giant planet, Gliese 581d stable climate and warm enough to have oceans, clouds, and rainfall," researchers said the National Centre for Scientific Research (CNRS).

Quoted from the Daily Galaxy, May 19, 2011, according to research published in the Astrophysical Journal Letters, Gliese 581d has a mass of at least 7 times bigger than the Earth is about 2 times the planet Earth.

Before this, the attention of astronomers precisely the focus to his brother, the planet Gliese 581g, after it emerged that the planet has a mass similar to Earth's mass and also near Goldilocks zone.

Was first discovered in 2007, Gliese 581d candidate was not originally signed as a place to search for extraterrestrial life. One reason is that he only gets a third of solar radiation as Earth and possibly get 'tidally locked' or just one side that always faces its sun and have a permanent day and night.

However, the latest model made by Robin Wordsworth, Francois Forget, colleagues and other CNRS researchers show a surprising result. Planet's atmosphere is able to store heat thanks to the dense gas CO2 and warmed by the light from the star.

"Overall, there temperature allows liquid water is present on the surface of the planet," said the researcher. "The mass of the planet that also means the gravity on its surface approximately two times higher than Earth's gravity," he said.

However, researchers can not simply send astronauts to the planet. From Earth, the spacecraft that can fly at speeds approaching the speed of light takes more than 20 years to get there. Unfortunately, the rocket technology that has been owned human beings has been only able to deliver us to Gliese 581d in 300 thousand years.

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Found, Wind Galaxy Destroyer

Infrared Space Observatory Herschel owned by European Space Agency (ESA) has detected the movement of wind consisting of gas molecules that flow away from the galaxy.

The wind that has been monitored for many years was thought to have sufficient power to destroy the galaxy consists of gas and halt star formation early on.

Herschel detected the wind is incredible. Some blowing hard, with a speed of more than 1,000 kilometers per second. The wind is 10 thousand times faster than the storms that blow on Earth.

"This is the first time that such molecular gas flow can be clearly observed in a galaxy," Echard said Sturm, a researcher from the Max-Planck Institute, who chaired the study, as quoted by the Daily Galaxy, Wednesday, May 11, 2011.

This finding, Sturm said, is important because the stars are formed from molecular gas. While this wind flow steal materials belonging galaxies needed to make new stars. "If hembusannya strong enough, they can even stop the total star formation," he said.

"With Herschel, now we can study what effect the wind is blowing towards the evolution of galaxies," said Sturm.

From the research, concluded that up to 1200 times the mass of our sun is lost every year due to the devastating winds. The amount is equal to the depletion of gas supplies to form a galaxy of stars between one and 100 million years into the future. In fact, the disruption of star formation has adverse effects on galaxies.

The wind itself could be due to the expenditure of particles and intense light of a new star or it could be by the shock wave from the explosion of an old star. Alternatively, the wind can be triggered by radiation caused by substances that are spinning around the black hole, in the middle of the galaxy-4R826TNZNX92

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2030, Space Trash Rise 3 Times Fold

 

Science Info-In a conference, William Shelton, chairman of the U.S. Air Force Space Command expressed concern about the increasing number of man-made space junk.

"The numbers continue to rise. Now it has more than 50 countries involved in space exploration, "Shelton said, as quoted from Space, May 10, 2011. "Currently, more than 20 thousand objects in the unused space," he said.

Currently, Shelton said, it continues to monitor regularly the growth of space debris. "Looking at growth trends, it is estimated that number will triple by 2030," he said. "In fact, the possibility of the amount of waste is 10 times more because we have sensors that are currently not able to keep track of all the waste that exists," said Shelton.

Terrible, call Shelton, objects that become garbage is very dangerous. "They can damage the system of military space, civil space systems, commercial satellites, and others," he said. "No one is immune from the threat that is in orbit today," Shelton said.

According to Marshall Kaplan, an expert on space debris of the Space Department, Johns Hopkins University, space junk in low earth orbit have been accumulating since the past 50 years. Last additions are, remnants of Anti-Satellite Test (asat) of China in 2007.

"One of these trials has increased the number of objects from the rubble about 35 percent," said Kaplan. "Worse, located at an altitude of 865 kilometers, where most populous region generally orbiting satellites," he said.

Another case, in February 2009, Iridium Satellite 33, US-owned communications satellite collides with the Cosmos, the Russian spacecraft that was not used, at an altitude similar to China's asat test. As a result, pieces of debris scattered more.

"The results of satellite launches during the past 50 years and the two events, now the area between the altitude of 700 kilometers to 1300 kilometers there jutaaan debris size from a few millimeters to several meters," says Kaplan.

Unfortunately, says Kaplan, the growth of this waste can not be reversed. Cleanup efforts space would be too expensive. "Currently there is nothing we can do. We do not have sufficient funds, the technology does not exist, and there is no cooperation. No one wants to fund this effort, "said Kaplan.

Kaplan added, the cleaning space is 'industry that continues to grow' but no one wanted to do. "In addition, politically, it is also not profitable," he said.

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Global Warming Disturb Internet Connection

 

Techno Info-Internet access via Wi-Fi connection and other communications-related threat of global warming unless some action is taken to protect them from temperatures continue to rise and weather gets worse.

According to Caroline Spelman, Minister of Environment UK, higher temperatures can reduce the distance the signal beam wireless communication devices. The rain storms can affect the reliability of the device in the capture signal. Wetter winters will also cause landslides, damaging the stake, as well as underground cables.

The threat posed by climate change on the Internet and telephone access is a rare occurrence and only developed countries that experienced more severe impact. In developing countries alone, a greater risk posed by climate change is flooding, droughts, and rising water level.

"If climate change threatens the quality of the signal or you do not get a signal due to extreme fluctuations in temperature, then you will incur a loss. This is very urgent for us to overcome, "Spelman said, quoted by the Guardian, Wednesday, May 11, 2011.

"Imagine if at the time an emergency condition, internet connection or telecommunications were cut off," said Spelman.

Spelman said the report prepared, it was concluded that the infrastructure, from roads and railways, electricity supply sources to the water supply source, should be made more resilient to climate change.

More detail, the report concludes, electrical cable network should be strengthened to prevent damage, the road must be coated with a protective surface for the asphalt does not melt, and the trains should be made more resistant to heat so as not curved.

The government itself, says Spelman, acknowledged that climate change impacts on telecommunications is not well understood. But a report prepared showed a number of potential risk. Besides the impact on coverage and reliability, the warmer temperatures and more intense storms that could potentially lead to the communication infrastructure have flooded or damaged by falling trees are uprooted.

In the report, researchers also predicted that changes in the growth of trees can affect how the radio waves move

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