Laser beams to explore alien worlds

Scientists are planning to explore alien world conditions right here on Earth, by using laser beams to hit a tiny target, creating conditions momentarily similar to what exists in the cores of stars and giant planets and inside nuclear weapons.

According to a report in Discovery News, these experiments would be conducted in a new national laboratory in the US that has the power to compress hydrogen down to the density of copper.

"It's an extraordinary time for this type of science," said Gilbert Collins, a physicist with the Lawrence Livermore National Laboratory in California, host to the new National Ignition Facility, which will use the power of 192 infrared lasers to demonstrate nuclear fusion.

Scientists plan to use the laser beams to hit a tiny target, creating conditions momentarily similar to what exists in the cores of stars and giant planets and inside nuclear weapons.

"Most of the planets we know about are outside our own solar system. They're large, they're in planetary systems that are weird, except well actually, it's perhaps our planetary system that stands out as being a little bit bizarre," said planetary scientist Raymond Jeanloz, with the University of California at Berkeley.

We've had a real breakthrough experimentally in being able to begin to reproduce these kinds of enormous pressures in the laboratory so we can actually study the properties of matter in these conditions.

Scientists'' first look at Mother Nature's planetary toolkit began with Earth, where interior pressures are about 3.5 million times higher than on the surface.

They then moved on to Jupiter, the solar system's largest world, with an interior pressure 70 million times stronger than Earth's.

Prodded by discoveries of extra-solar planets up to 10 times larger than Jupiter, physicists are beginning to explore how matter behaves at pressures that are millions or even a billion times greater than on Earth.

Flying saucer (or) unidentified flying object

Flying saucer is a type of unidentified flying object (UFO) with a disc- or saucer shaped body. It is described as silver or metallic covered with running lights or surrounded with a glowing light, moving rapidly either alone or in tight formations with other similar craft.

The first highly publicized sighting was seen by Kenneth Arnold on June 24, 1947. He never specifically used the term "flying saucer" and he was quoted the shape of the objects as a "saucer", "disc", or "pie-plate", and several years later added he had also said "the objects moved like saucers skipping across the water."

Flying objects sighting was followed by thousands of similar sightings across the world. Such sightings were once very common, to such an extent that "flying saucer" was turn a synonym for UFO.
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