Saturday, February 13, 2016

Polluted air causes 5.5 million deaths a year new research says

More than 5.5 million people worldwide are dying prematurely every year as a result of air pollution, according to new research.
Most of these deaths are occurring in the rapidly developing economies of China and India.
The main culprit is the emission of small particles from power plants, factories, vehicle exhausts and from the burning of coal and wood.
The data was compiled as part of the Global Burden of Disease project.
Scientists involved in the initiative say the statistics illustrate how far, and how fast, some nations must travel to improve the air their citizens breathe.

Read More

Gravitational waves have been detected for the first time

TWO black holes circle one another. Both are about 100km across. One contains 36 times as much mass as the sun; the other, 29. They are locked in an orbital dance, a kilometre or so apart, that is accelerating rapidly to within a whisker of the speed of light. Their event horizons—the spheres defining their points-of-no-return—touch. There is a violent wobble as, for an instant, quintillions upon quintillions of kilograms redistribute themselves. Then there is calm. In under a second, a larger black hole has been born.

It is, however, a hole that is less than the sum of its parts. Three suns’ worth of mass has been turned into energy, in the form of gravitational waves: travelling ripples that stretch and compress space, and thereby all in their path. During the merger’s final fifth of a second, envisaged in an artist’s impression above, the coalescing holes pumped 50 times more energy into space this way than the whole of the rest of the universe emitted in light, radio waves, X-rays and gamma rays combined

Read More

Friday, February 5, 2016

100-Foot Asteroid to Buzz Earth Next Month

An asteroid as long as a basketball court will give Earth a close shave next month — though scientists aren't sure just how close.
The near-Earth asteroid 2013 TX68, which is thought to be about 100 feet in diameter, will zoom past our planet on March 5. The space rock could come as close as 11,000 miles — less than 5 percent of the distance from Earth to the moon — or stay up to 9 million miles away during the flyby, NASA officials said.

Blog Archive