The world survives the start-up of the biggest ever scientific experiment

CERN

The LHC is the world’s most powerful particle smasher. Its 27-kilometre circumference ring comprises 1,600 superconducting magnets, most weighing over 27 tonnes. Approximately 96 tonnes of liquid helium keep the magnets at their operating temperature of minus 271.3 degrees centigrade. That is colder than outer space. When operational, the various experiments will produce roughly 10 petabytes of data a year. If recorded onto data CDs, the stack would be nearly 20 kilometres tall.

The LHC accelerates protons (a type of hadron) to 99.999 percent of the speed of light. Two beams of protons, travelling in opposite directions around the ring, collide in four detectors. By examining the debris from these collisions, scientists will try to answer five important questions.

Under Earths gravity, you experience mass as weight. But, what exactly is mass? In 1964, Professor Higgs proposed the mechanism that gives rise to mass. The particle involved is known as the Higgs boson. It is also known as the ‘God Particle’, much to his disgust of the atheist Higgs.

No one has ever detected the Higgs boson. Scientists hope to detect it in the debris of the LHC collisions.

Scientists attempting to understand the nature of the universe have an embarrassing problem; they cannot see 96 percent of it. They know it is there because they can see its affects on the motions of galaxies, but they cannot see it directly. They call the missing stuff 'dark matter' and 'dark energy.'

Different theories have been proposed to explain this dark stuff, predicting different results for the LHC. Therefore, the results from the LHC will eliminate some of the competing theories.

Current theories describing the birth of the Universe, say it exploded into existence about 13.7 billion years ago in an event known as the Big Bang.

In the first microseconds after the Big Bang, the Universe was so hot, that matter as we know it could not exist. Instead, there would have been a soup of fundamental particles known as quark-gluon plasma. The collisions in the LHC will produce similar quark-gluon plasmas, allowing scientists to explore the nature of the very early Universe.

Everything in the Universe is made of matter. The opposite of matter, known as anti-matter, has the same properties of matter, but with the opposite electrical charge. When matter and anti-matter come into contact, they mutually annihilate.

Current theories predict that equal amounts of matter and anti-matter were created in the Big Bang, and then destroyed each other. In other words, we should not be here. However, as we self-evidently are here, there must have be a bias in favour of matter. Results from the LHC will help discover the differences between matter and anti-matter.

We experience the universe in four dimensions, three of space and one of time. Scientists propose there are may be more dimensions that may are detectable using the LHC. At the very high energies involved in the LHC collisions, particles may travel into these other dimensions so apparently disappearing.

For a great description of how the LHC works, see the following video, produced by CERN.

The LHC is not without controversy. A few scientist worry the high-energy collisions at the LHC could lead to the destruction of the Earth. A legal challenge was mounted to try to stop the LHC from being switched on. CERN maintains, and nearly all scientists agree, that there is no danger, not least because such high-energy collisions happen all the time in the Earth upper atmosphere.

The LHC shut down shortly after start-up, when liquid helium coolant leaked from the one of the superconducting magnets. It takes a month to warm the machine up for repairs, and then a further month to cool in down again, so repairs will run into the scheduled winter break. CERN cannot afford the electricity to run the LHC during the winter.

The LHC will be up running again, spring 2009. With luck, it will begin to answer some of those questions within the year.

Discovery News's space correspondent, Irene Klotz, details the Universe from A to Z in the Carnival of Space 69. Lost of good stuff there, so go to it.

The summer of 2008 will go down as, "The Summer Aliens (Almost) Invaded the UK."

It started in May, when the British Government released previously secret UFO files to the National Archives. The files included corroborated reports from reputable sources of UFOs hovering over British cities.

In one amazing incident from 1984, air-traffic controllers describe a, "brilliant solid ball of light, bright silvery in colour," land on a runway in front of them, then takeoff in a near vertical climb. These stories appearing in both the national press and on TV caused quite a stir.

What happened next depends on your point of view. In one narrative, worried by their pubic exposure, the UFOs decided to step up their invasion plans, with the UK the center of the attack.

Another point of view has it that once UFOs became newsworthy, UFO stories multiplied. When people saw these reports, things they once dismissed as mundane they now perceived as UFOs. With more sightings publicized, people become more likely to report their own experiences, as they were no longer are worried about being labelled as "weird." It was a self-reinforcing process.

Whatever the reason, by mid-summer, UFO sightings had rocketed (excuse the pun). Malcolm Robinson, the founder member of Strange Phenomena Investigations, told the normally staid Daily Telegraph, "Something very bizarre is happening in the skies over the UK."

The national press ran stories on a "glowing" disc spotted above the M5 motorway, on fleets of objects hanging in the sky above an army barracks and of a police helicopter chasing a UFO.

In one famous story, a man calls the police to report a mysterious light hovering above his house, only to have the Police identify it as the moon when they arrived at the scene.

My hometown, Stevenage, has not been immune. A sighting in August was the first UFO sighting in the town in 32 years. The local Comet reported multiple-sightings of between two and seven orange spheres, travelling silently in a parallel course to the local airport's flight path. One group of 10 people at a barbecue took photos, which also appeared in the paper.

A week later, the paper provided the explanation. Someone had been letting off Chinese lanterns in the town. Chinese lanterns are baby hot air balloons about the size of a dustbin liner. The local airport was not amused. Pointing out that anyone releasing such objects needs to get clearance from the Civil Aviation Authority first.

Not everyone I know accepts this explanation, conspiracy and cover-up are suspected. "I believe," and, "the truth is out there," they mutter.

Now September has arrived, the new soccer season has started and UFO reports have died down. With a new cold war looming and the UK facing its worse recession in 60 years, we may be looking back with fondness to the summer of 08. When all we had to worry about was ET stopping by for some barbecue chicken.