The Great Pyramids

The Great Pyramids of Giza also known as the Pyramids of Khufa and the Pyramids of Cheops, is the oldest and largest of the three pyramids in the Giza necropolis boundary what is now EI Giza Egypt.

From the Seven Wonders belonging to the Past World, its the only one remain longingly entire.

Egyptologists admit that the Pyramids was built as a tomb for fourth line of hereditary rulers. Pharaoh Khufu for the 3,800 years, the Great Pyramids was the only highest man-made Structure with 146.5 meters ( 480.6 ft ) ( length ).

A large of casing stones formed a smooth outer surface of the great pyramids. these have been more possibilities and modifying theories about the construction techniques of the great pyramid.

Most believed construction hypothesis are based on the idea that it was constructed be moving huge stones from excavation for building stones and by dragging and lifting them into place or position. There are three chambers inside the great pyramids.

The lowest chamber is cut into the bedrock on which the great pyramid was constructed and was uncompleted. Then the Queen's and King's chambers are higher up within the pyramid structure.

The great pyramid of Giza is the only known pyramid in Egypt that containing ascending and descending both passage.

The meaning of Pyramid is a solid figure in a square base. Its shape , structure as still challenging for Egyptologists. The great pyramid was constructed over a twenty year period concluded around  2560 BC. The present height of the pyramid is 455.4 ft ( 238.8 meters ).

Each base sides was 440 cubits ( 230.4 meters or 755.9 ft long ) according to royal cubit measure 0.524 meters. Estimated mass of the pyramid in 5.9 million tones.

The Great Wall Of China

The Great Wall of China is a serial of defensive work called fortification. It is made of stones, wood, brick, tamped earth and other solid materials. The wall of China built along on east to west line from the northern historical borders of China. The purpose behind the construction of wall was to protect the China for its prototypical state from thrust in by various nomadic groups or military sudden attacks by various warlike people or forces.

The concept of defensive wall's construction was settled from the century BC, when several walls had already began to be built at that time. Later on these all walls joined together and made bigger, stronger and consolidated are now aggregate imputed to as the GREAT WALL.

The most famous wall had been built between 220-206 BC by the first Empire of China, His name was Qin Shi Huang.

Since then, the Great China Wall has on and off been reconstructed, maintained, heightened. The most of the part of the existing wall was rebuilt during the Ming imperial.

Other aims  of the Great Wall of China have comprised allowing for border control practices like check points for trade purpose and to bring in order or encourage trade of horses and silk products and also to control emigration and immigration.

Then the construction of troop barracks, watch towers, garrison stations enhanced the defensive characteristic of the Wall. It stretches from Lop Lake west to Shanhaiguan east.

The archaeological measurement of the wall is 8,851. 8 .Km.

The Great China wall is also known as the WONDER OF THE WORLD and the Longest Wall of the World.

Taj Mahal

The Taj Mahal is a white marble magnificent tomb located in a city of India "Agra". The Taj Mahal was built by Mughal Emperor Shah Jahan in the memory of his third beloved wife, Mumtaz Mahal.

The Taj Mahal is immensely known as the "Jewel of Muslim Art in India". It is one of the universally praised masterpiece of the World's Asset. Taj Mahal's design combination of Persian, Turkish and Indian architect. White domed marble is specialty of the Taj Mahal, that make it unique in itself.

Around 1632, The construction of Taj Mahal was started and completed in 1653. The construction of the Taj Mahal  was confided to a board of architects industry Abdul Karim, Makranat Khan and Ustad Ahmed Lahori.

In 1631, Shah Jahan the Great Mughal Emperor was stricken in grief. when his wife Mumtaz died during the birth of their 14th child.

the Shah Jahan decided to construct a world art piece in the memory of his beloved wife. That's why the Taj Mahal is also known as a symbol of Love.

In 1632 construction was started and tomb was completed nearly in 1648, while surrounding buildings and gardens were finished after 5 years.

In 1983, the Taj Mahal became a WORLD HERITAGE SITE. Its also known for its white Marble. Though Mughal Emperor used Red Marbels in primary constructions.

Use of white marble withe precious stones under supervision of Mughal Emperor, Taj Mahal reached new levels of refinement.

Taj Mahal also known as the WONDER OF WORLD

The Natural Wonder Chocolate Hills

Chocolate hills are the eye catching attraction for the tourist. It is been ranked number 6 in the list of Seven Natural Wonders of the World. Some times it is considered as the "Eight Wonder of the World.

It is located in Bohol province “Philippines “. They are naturally coned shaped green hills which turn up chocolate brown in sun during dry season, for its color reason it drive the name of the chocolate hills . These hills are in different sizes, if we see them from the aeroplane they look like small moles here and there.

Some people say these hills look like women’s breast and it also reminds us the hills in the drawing of a small child.

The geologists have not reached the consensus on how these hills where formed, but however they believe that these hills were formed from marine limestone on top of a clay layer.

Government owned the Chocolate Hills Complex and a resort having a restaurant, shops, hotel with swimming pool, and a viewing deck that offers a 360° view of the chocolate hills and the blue sea beyond. Vans and buses are the most common means of transport to go there.

The Palm Islands

The Palm Islands are an artificial group of Islands in Dubai. United Arab Emirates on which major commercial and dwelling Place infrastructure will be built. They are being build by Nakheal Properties, a property evolutioner in the UAE, who employed Belgian and Dutch marine and dredging contractor Jan De Nul and Van Oord, some of the world's most devoted persons in land reclamption. The Islands are the Palm Jebel Ali , The Palm Deria And The Palm Jumeirah. Each establishment will be in the shape of Palm Tree, topped with a increasing moon and will have numerous residential, entertainment and leisure centers.

The Palm Islands are situated off the Sea shore of the UAE in the Persian Gulf and will plus 520 kilometers of beaches to the city of Dubai

The first two Islands will include nearly 100 million cubic meters of rock and sand. Palm Deria will be made of approximately one billion cubic meters of sand and rock. Excavation for building stone will be in UAE.

Between the three Islands there will be more than 100 Luxuries Hotels, Special Residential Beach Side Villas and Apartments Restaurant, Water Theme Parks, Marinas and Best Serving Health Spas.

The construction of the Palm Jumeirah started in June 2001. Briefly after the Palm Jebel Ali was proclaimed and reclamation work began. The Palm Deira which is Schemed for accomplishment of surface area of 46.35 square kilometers, was proclaimed for development in October 2004

Aurora

For thousands of years Aurora has been one of the most conspicuous mysteries to be solved.
In ancient Romans, Aurora is known as the the goddess of the dawn.It is thought that aurora is
burning of volcanoes,an extensive prairie or a forest fire in the interior of the earth.
In North America it is called the dance of spirits.
Aurora is the natural colors lights which can be seen at poles. Mostly aurora occour at poles. In north pole it is called Aurora borailis and in south pole it is called aurora australis.

As you know that earth behaves like a magnet.There is a magnetic field around the earth. Earth magnetic activity is due to the molten iron present in the core of earth. Magnetic field of earth is extend from earth's core to space.The field lines go into and out  of the Earth . magnetic field of the earth prevents earth from solar radiations. These solar radiations are very harmful for life.

These solar radiations is of course also essential for life on earth. solar heating drives weather system and ocean currents and for photosynthesis. As the result of photosynthesis oxygen gas is released into the atmosphere. Oxygen and nitrogen are mainly present in the atmosphere as well as in ionosphere.the molecules of these gases are present in form of atoms because it absorbs high energy photons from the sun. .Ionization depends primarily on the Sun and its activity.The amount of ionization in the ionosphere varies greatly with the amount of radiation received from the Sun.
Aurora is caused by high energy particles from the solar wind which are  trapped in earth's magnetic field.As these particles enters in magnetic field they come down into the atmosphere near the north and south magnetic poles where magnetic lines disappear.
As these high energy particles stokes with oxygen and nitrogen molecules in ionosphere, this excited the molecules and they emit light when they when they come to their ground state.The emission of energy are of different color because of different gases.

Oxygen        green or brownish red

Nitrogen      blue or red

The extent of color shown also depend upon the amount of radiations absorb.