Selasa, 26 Januari 2010

Mercury's close neighbors of the sun

Once upon a time people considered Mercury greek as two different celestial bodies. The reason, the appearance of large planets similar to our moon, it is sometimes located in the east and sometimes west. They also gave two names to the Mercury, which is called the morning star with the name "Apollon" and the evening star with the name "Hermes". Until finally they realized that it's two celestial bodies is the same thing, namely Mercury.

Mercury is the planet closest to the sun, the average distance of Mercury to the sun about 58 million km. planet Mercury can be likened to a body of standing near a very hot fire in a very cold night. Mercury hemisphere facing the sun is very hot, while the other hemisphere frozen. Just imagine if if you're standing in a place where part of one very hot and other parts of extraordinary cold. Mercury received heat far greater than that received by the earth is our departure. Moreover, this planet does not have a blanket of air that can store heat. As a result side not facing the sun becomes very cold, around -2736.16 degrees Celsius.
On the planet there is a swimming-pool and giant craters, steep cliff, tall mountains and broad plains. On Mercury's surface resembles the surface of the earth. In addition, mekurius resemble moon too. If you set foot in there, maybe you think you've landed on the moon. Like the moon, this planet has craters and pools formed by the hit-and-asteroids and meteorid. The craters on the label merkutius with kompser names, author, and renowned artists. Among Beethoven, vibaldi, Renoir, and Dickens.

Could an Asteroid Hit the Earth

a collection of asteroids moving rapidly toward the earth NASA experts and other space experts hurriedly created panic. Rescue the announcement had not yet done, asteroids have crashed into the eastern part of asia, among others in Shanghai, China.
In proclaim, millions of people were killed and one of the largest and busiest cities in China were destroyed. To stop the collection of the asteroid attack to other parts of the earth's, the NASA sends experts sea oil drilling off into space. The goal, to drill one of the main asteroid collision with Earth that could be avoided.
The picture above is not the reality. It is only a science fiction story in the movie Armageddon, starring the famous actor Bruce Willis. A fairly successful film that tells how the threat of attack against Earth asteroids.
So far, the earth is safe from the threat of asteroid attack. At least, so that presented the space ahliluar gathered in the center of NASA, if a collision with an asteroid occurred, said Erik Asphaugh, space researchers from the universities of California, santa cruz, there will be a mighty powerful explosions in the earth that reaches 10 megatons of energy. As a result, he explained, is remarkable. The attack, he said, will cause great destruction and mass death. Therefore, experts recommend that all nations should mebuat common defense to prevent the crash.
And if the asteroid had crashed into the ocean it will arise the Tsunami waves are very large at hundreds meters, and destroyed the cities located in coastal dunes. A large asteroid could destroy the entire species on earth. Last asteroid that hit Earth occurred 65 million years ago when an asteroid six miles wide that destroyed the dinosaurs and about 70 percent of all species.

Jumat, 22 Januari 2010

IMPACT OF GLOBAL WARMING ON LIFE.

Global warming is a problem in the world who felt by all countries in the world. Both countries are poor, developing countries, as well as developed countries. Global warming on the show with the increase in sea surface temperatures can result in disaster for the earth.

Scientists predict that world temperatures average 0.5 C increase every year. Temperature rise is increased evaporation, so the rain falls more like the tropics, while the temperate regions would experience dry summers and longer winters and shorter.
In general, the consequences caused by the existence of global warming there are two, namely global climate change and rising sea levels. global climate change.
Global climate change will lead to a result are as follows.
in some tropical areas will be flooded, while in other areas experiencing Drought, which causes decrease in agricultural productivity.
cause decline in farm productivity in temperate climates if summer lasted longer and dry.
dry regions will get more rainfall because of the many climate shifts to the north. As a result, the productivity of agricultural land will increase.
drought that occurred in the tropics and temperate regions may cause forest fires, rising sea levels.
Global warming causes global temperatures keniakan which resulted in melting polar ice that sea level rises further. This will lead to a result are as follows:
1. sinking of the islands in the southern Pacific ocean.
2. destruction of settlements, ports, and other facilities, while cities like london and countries such as the Dutch can drown.
3. entry of sea water inland, causing the ground water becomes salty.
4. damage to the river delta, rising waters could submerge 1 m 30% of land in the delta region in Egypt.
5. wildlife habitat in the marshes and coral reefs will be threatened damaged. In addition, forest manggrove with keinikan ekositemnya consisting of various fish, shrimp, crabs, reptiles, birds, and amphibians will be damaged.
By knowing the effects of global warming. Then it was time for every country to speed emsi and mengurnagi gases that can be caused to the impact of global warming, especially carbon dioxide and CFCs. Carbon dioxide emissions will be reduced by policies to use resources
Energy instead of fossil or improve the efficiency of fossil fuel usage and reducing deforestation and increasing reforestation efforts again widely. Reduction in carbon dioxide emissions is expected to maintain the supply of oxygen and hydrogen elements that can function globally to clean gases cause the greenhouse effect.