LARGE HADRON COLLIDER

The Large Hadron Collider ( LHC ) is the world's largest and highest-energy particle accelerator , intended to collide opposing particle beams , protons at an energy of 7 TeV /particle or lead nuclei at 574 TeV/particle.

The Large Hadron Collider was built by the European Organization for Nuclear Research (CERN) with the intention of testing various predictions of high-energy physics , including the existence of the hypothesised Higgs boson and of the large family of new particles predicted by supersymmetry . It lies in a tunnel 27 kilometres (17 mi) in circumference, as much as 175 metres (570 ft) beneath the Franco-Swiss border near Geneva , Switzerland . It is funded by and built in collaboration with over 10,000 scientists and engineers from over 100 countries as well as hundreds of universities and laboratories.

On 10 September 2008, the proton beams were successfully circulated in the main ring of the LHC for the first time. On 19 September 2008, the operations were halted due to a serious fault between two superconducting bending magnets. Due to the resulting damage, the LHC will not be operational again before the end of September 2009.

THE SOLAR SYSTEM

What is the solar system? It is our Sun and everything that travels around it. Our solar system is elliptical in shape. That means it is shaped like an egg. The Sun is in the center of the solar system. Our solar system is always in motion. Eight known planets and their moons, along with comets , asteroids , and other space objects orbit the Sun. The Sun is the biggest object in our solar system. It contains more than 99% of the solar system's mass . Astronomers think the solar system is more than 4 billion years old.

Astronomers are now finding new objects far, far from the Sun which they call dwarf planets. Pluto , which was once called a planet, is now called a dwarf planet.

GREAT WALL OF CHINA

The Great Wall of China was built mainly to protect the Chinese Empire from the Mongolians and other invaders. It was first built in the 7th century BC when China was still divided into many small states. The construction of the Great wall had never ceased for nearly all the Chinese fuadal dynasties.


The Great Wall of China extends 4,000 miles westward: from the China Sea town of Shanhaiguan to Gansu province.

The majestic Great Wall was built with wisdom, dedication, blood, sweat and tears. It has been estimated that somewhere in the range of 2 to 3 million Chinese died as part of the centuries-long project of building the wall.

Nearly everyone has heard of the huge stone wall known as the Great Wall of China. As one of the UNESCO World Heritage Site in China, The Great Wall is not just a wall, but a symbol of bravery and wisdom of Chinese people.