Close call signals Earth needs an asteroid shield


LONDON: Extensive monitoring systems and an Armageddon-style protocol is needed to save the Earth from a potentially hazardous asteroid, expected to fly by our planet in 2029, experts say. Actor Bruce Willis and his co-stars are given just 18 days to destroy a vast asteroid which threatens to wipe out life on Earth in the Hollywood movie "Armageddon" .

Scientists say the world must come up with a similar emergency plan after an asteroid whistled within a whisker of the Earth on Tuesday, only two days after it was first detected by astronomers , 'The Telegraph' reported. The Apophis asteroid , first detected in 2004, will come within 36,000 kilometres of Earth when it passes by and it can be seen with the naked eye as a burning point in the sky.

Scientists said although there is no chance of the asteroid colliding with Earth, there is an extremely small chance it could fall into a gravitational loop and come back to hit the planet in 2038.

The asteroid which passed by this week, known as 2012 XE54 measured just 36 metre across, but the last known asteroid of such a size to hit Earth wiped out an area of Russian forest the size of London in 1908.

Scientists are becoming increasingly concerned about the possible impact of asteroids measuring less than 1km across, which are not typically picked up by surveying programmes and could only be detected at very short notice.

Delegates from across the world will gather at the UN in February to come up with a framework for earlier detection of asteroids, and a plan of action if a collision is deemed possible.

Master computer controls universe?


Master computer controls universe?
Physicists mull theory that humans may be mere pawns in a PC program
MELBOURNE: Scientists are conducting experiments to discover whether the universe exists within a Matrixstyle computer simulation created by super computers of the future.

The experiments being conducted by University of Washington could prove that we are merely pawns in some kind of larger computer game. However, it is unclear who created these super computers that may hypothetically power our existence.

"Imagine the situation where we get a big enough computer to simulate our universe, and we start such a simulation on our computers," said professor Martin Savage, a physicists working on the project. "If that simulation runs long enough, and have same laws as our universe, then something like our universe will emerge within that simulations, and the situation will repeat itself within each simulation," he said.

The current understanding of string theory indicates that there are 10,500 universes with different laws that determine the behaviour of particles within them, he said.

"So it is certainly true, that with enough computer resources, theorists would like to explore these universes ," he added.

Explaining how the experiment works, physicists claim that finite computer resources mean that space time is not continuous but set on a grid with a finite volume, designed to create maximum energy subatomic particles. The direction these particles flow in will depend on how they are ordered on the grid. They will be looking at the distribution of the highest energy cosmic rays in order to detect patterns that could suggest that universe is the creation of some futuristic computer technology.

And if it does turns out that we are mere players in some sort of computer programme, they suggested that there may be a way to mess with the program, and play with the minds of our creators. "One could imagine trying to figure out how to manipulate the code, communicate with the code and questions that appear weird to consider today," he said.

'Divine particle' makes researchers curious

PUNE: Spiritual expert Anjali Gadgil generated immense curiosity among a gathering of 150-odd researchers and scientists on Friday as she talked about the discovery of a new crop of particles, termed 'divine particles'. Gadgil presented her paper at the 17th national conference of the Indian Aerobiological Society, underway in the city.

Gadgil, who analysed the nature of the newly-discovered particles from the laboratories of the Bhabha Atomic Research Centre (BARC) and the Indian Institute of Technology (IIT), Bombay, said the particles are 'inorganic matter' containing carbon and oxygen, and do not resemble any existing particles. The particles are claimed to be golden in colour and were first discovered in July this year.

While presenting her study, Gadgil reported that the particles were first noticed on the hands of hypnotherapist Jayant Athavale. When he rubbed his hand, around 15 to 20 golden particles fell down.

Gadgil, who undertook this research with assistance from Durgesh Samant, collected a sample of these particles and sent it to several reputed scientific institutes. "We received the sample test report recently from BARC as well as IIT, Bombay. The report states that the particles have no resemblance to soil or the surrounding environment," Gadgil said.

S K Jha, head of the environmental assessment division, BARC, who tested the samples of the particles at BARC, said, "The particles contain only carbon and oxygen and the formulae of these particles do not match any particles that exist. They are purely inorganic matter." BARC used the energy dispersive X-ray fluorescence test on the particles to determine their nature. Jha is an expert in conducting tests under this technique. His report further stated: "These particles do not have other metallic elements as are seen in environmental air particulate."

Gadgil and her colleagues clarified that they are not trying to explore the existence of the particles.
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