UFO IN SKY

UFO An unidentified flying object is appeared in sky
UFO Flying Over China July 9 2010!!! REAL 

Comets

Comets are small and have a composition of ice, rock, and cosmic dust loosely packed together. Comets come from the cold, outer solar system. When a comet passes close enough to the sun, solar radiation heats the water ice so that the comet gives off gas and dust in the form of a long tail. This is how a comet gets its tail. Sometimes a comet can get two tails, an Ion tail or a dust tail. The ion tail is made up of electrically charged particles called ions. The solid center of the comet is called the nuclei. A comet's nuclei can range from less that a half a kilometer to more than 100 kilometers in diameter

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the first man to have traveled in space,

Fifty years ago, on April 12, Former Soviet fighter pilot Yuri Gagarin became the first man to have traveled in space, in a 108-minute flight, that almost ended in a disaster.

The Soviet human spaceflight project, the Vostok Programme, was an ambitious effort to confirm Soviet leadership in space.

Although several launches had successfully carried animals into space, it wasn't known how a man would react to the weightlessness and isolation of a space flight.

Alexey Leonov, Yuri Gagarin's Friend has said, "It's like dressing a man in a suit and shoving him into a blast furnace, saying, 'fear not, the suit will protect you.' But nobody knows for sure if it will actually protect you or not."

Some believed weightlessness would turn men mad or squeeze their eyeballs into jelly. On April 12, 1961, Gagarin proved that pilots could normally operate spacecraft and communicate with mission control.

Vostok-1 Spacecraft Design Engineer Valeriy Lubinskiy said, "He didn't get to actually pilot the spacecraft, although he had all necessary controls to conduct a manual descent and landing, in case the automation would have been unusable".

Gagarin's flight made him famous all around the globe, opening the way for further manned missions, but it didn't change Gagarin's frank personality.

"I should say I even feel somewhat uncomfortable in front of my friends that my flight lasted only an hour and forty-eight minutes. But this, of course, was only the beginning, only the first scouting of space," Gagarin had said.

Gagarin died seven years later in a plane crash. He was only thirty-four years of age. He left behind a legacy of the pioneering spirit, discovery and friendship that has shaped human spaceflight ever since.

The big bang theory

Big Bang Theory 

The Big Bang theory is an effort to explain what happened at the very beginning of our universe. Discoveries in astronomy and physics have shown beyond a reasonable doubt that our universe did in fact have a beginning. Prior to that moment there was nothing; during and after that moment there was something: our universe. The big bang theory is an effort to explain what happened during and after that moment. 

According to the standard theory, our universe sprang into existence as "singularity" around 13.7 billion years ago. What is a "singularity" and where does it come from? Well, to be honest, we don't know for sure. Singularities are zones which defy our current understanding of physics. They are thought to exist at the core of "black holes." Black holes are areas of intense gravitational pressure. The pressure is thought to be so intense that finite matter is actually squished into infinite density (a mathematical concept which truly boggles the mind). These zones of infinite density are called "singularities." Our universe is thought to have begun as an infinitesimally small, infinitely hot, infinitely dense, something - a singularity. Where did it come from? We don't know. Why did it appear? We don't know. 

After its initial appearance, it apparently inflated (the "Big Bang"), expanded and cooled, going from very, very small and very, very hot, to the size and temperature of our current universe. It continues to expand and cool to this day and we are inside of it: incredible creatures living on a unique planet, circling a beautiful star clustered together with several hundred billion other stars in a galaxy soaring through the cosmos, all of which is inside of an expanding universe that began as an infinitesimal singularity which appeared out of nowhere for reasons unknown. This is the Big Bang theory.

space shuttle landing

Clouds Delay Shuttle Landing Until Tuesday

NASA is delaying the homecoming of the Discovery space shuttle until Tuesday after bad weather has spoiled 2 landing attempts on Monday, according to NASA officials.

The landing at Kennedy Space Center in Florida has been rescheduled for 7:33 am (EDT) Tuesday morning. NASA has allowed for several backup plans that could possibly push the landing to the west coast if the weather doesn’t cooperate.

NASA would rather land in Florida than California, as the shuttle would have to be ferried back to Florida for processing, which would be both costly and time-consuming.

The 13 day mission has already been extended an extra day so astronauts could use the International Space Station’s communications system to relay heat shield inspection results, as NASA discovered a communications antenna failure on the shuttle shortly after the April 5 launch.

The Discovery crew has enough supplies to last until Wednesday, however, NASA will land on Tuesday even if they have to move the landing to Edwards Air Force Base in California, said flight director Bryan Lunney.

Tuesday’s forecast for Florida shows improvement, but still includes a chance for rain showers within 30 miles of the space center.

Discovery spent 10 days at the space station, a $100 billion project that is due to be completed this year after more than a decade of construction. The shuttle delivered a new ammonia coolant tank and other necessary supplies including a darkroom for Earth observations.

Three shuttle missions remain to ferry supplies to the station before the shuttle fleet is retired. Many shuttle workers for NASA had hopes that the shuttle program might be extended. Those hopes were crushed when President Obama announced his space policy at Kennedy Space Center on April 15.