Thursday, August 6, 2009

BADGES ON SALE !!
1 PCS MYR 4.00
3 PCS MYR 10.00
12 PCS (1 SET) + ELEGANT BOX MYR 40.00

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These badges are sold only to SMJK Keat Hwa students.
Expiry Date: 1st Sept 2009
Purchase Method by sms:
name-class-code
send to
0175997331
eg:
ANGEL-L6S1-04
You can pay by money order
or
i'll collect from your class.
Thank you for your anticipation !!










Wednesday, July 22, 2009

Many asteroids are comets
--post by SMK KEAT HWA ASTRONOMY SOCIETY
PARIS - MANY of the primitive bodies wandering the asteroid belt between Mars and Jupiter are former comets, tossed out of orbit by a brutal ballet between the giant outer planets, say a team of astrophysicists.

A commonly accepted theory is that the asteroid belt is the rubble left over from a 'proto-planetary disk,' the dense ring of gas that surrounds a new-born star. But the orbiting rocks have long been a source of deep curiosity. They are remarkably varied, ranging from mixtures of ice and rock to igneous rocks, which implies they have jumbled origins.
The answer to the mystery, according to a study published by the British journal Nature on Wednesday, is that a 'significant fraction' of the asteroid population in fact comprises ex-comets.
Famously described as 'dirty snowballs' of ice and dust, comets are lonely, long-distance wanderers of the Solar System whose elliptical swing around the Sun can take decades.
Researchers in France and the United States ran a mathematical model of the development of the early Solar System, when the planets were accreting from clustering masses of dust and gas.
According to this model, the nascent giant planets - Jupiter, Saturn, Uranus and Neptune - orbited at this time in a pretty compact configuration, between five and 15 astronomical units (AUs) from the Sun.
An AU is a standard unit of measurement for Solar System distances. It equals the distance from the Earth to the Sun, or around 150 million km. Beyond the giant planets was a disk-shaped mass of comets, known as trans-Neptunian objects, between 16 and 30 AUs from the Sun.
As the giants became bigger and bigger, their orbits became unstable. Eventually, after around 600 million years, Uranus and Neptune were kicked out by gravitational jousting.
They rammed into the disk of comets and scattered its members throughout the Solar System, according to this model. Many of them were captured by the weak gravitational force of the asteroid belt, where they remain to this day.
'It's a paradigm shift,' said Matthieu Gounelle of France's National Centre for Scientific Research (CNRS) in a press release. 'The asteroid belt is not just a leftover from the formation of the Solar System, but also that of violent phenomena' including the great planetary migration.
If the model is right, it implies that the difference between the most primitive asteroids and comets is even slimmer than thought. It would also shed light on the controversial origin of micrometeorites, or tiny extraterrestrial particles that survive the fiery passage through Earth's atmosphere.
Micrometeorites are different from meteorites in composition and texture, and this could be explained if they derive from comets, which are richer in organic material and crumblier than native asteroids. -- AFP
Solar eclipse enthralls Asia
Solar eclipse spreads cloak of darkness over Asia
POST BY SMK KEAT HWA ASTRONOMY SOCIETY
7/22/2009 3:05 AM GMT


















The longest solar eclipse of the 21st century cast a shadow over much of Asia on Wednesday, plunging hundreds of millions into darkness across the giant land masses of India and China.


Ancient superstition and modern commerce came together in a once-in-a-lifetime opportunity which could end up being the most watched eclipse in history, due to its path over Earth's most densely inhabited areas.

While the well-heeled took to the skies to watch the phenomenon from specially chartered planes, others took to holy waters to purify themselves as the sun's rays were snuffed out from Mumbai to Shanghai.

The cone-shaped shadow, or umbra, created by the total eclipse first made landfall on the western Indian state of Gujarat shortly before 6:30 am (0100 GMT).

It then raced across India, blacking out the holy city of Varanasi on the banks of the Ganges, squeezing between the northern and southern tips of Bangladesh and Nepal before engulfing most of Bhutan, traversing the Chinese mainland and slipping back out to sea off Shanghai.
Monsoon clouds in India and bad weather over eastern China spoiled the party for millions who had got up early to watch the solar blackout.
In Mumbai, hundreds of people who trekked up to the Nehru planetarium clutching eclipse sunglasses found themselves reaching for umbrellas and rain jackets instead.

Heavy overnight rain turned torrential just as the eclipse was due to start.
"We didn't want to watch it on television and we thought this would be the best place," said 19-year-old student Dwayne Fernandes.
"We could've stayed in bed," he said.
"Maybe, we'll just tell people we did see it," suggested his classmate Lizanne De Silva.

A total solar eclipse usually occurs every 18 months or so, but Wednesday's spectacle was special for its maximum period of "totality" -- when the sun is wholly covered -- of six minutes and 39 seconds.
Such a lengthy duration will not be matched until the year 2132.
Superstition has always haunted the moment when Earth, moon and sun are perfectly aligned. The daytime extinction of the sun, the source of all life, is associated with war, famine, flood and the death or birth of rulers.

Desperate for an explanation, the ancient Chinese blamed a sun-eating dragon. In Hindu mythology, the two demons Rahu and Ketu are said to "swallow" the sun during eclipses, snuffing out its light and causing food to become inedible and water undrinkable.

In the run up to Wednesday's eclipse, some Indian astrologers had issued predictions laden with gloom and foreboding, while superstition dictated that pregnant women should stay indoors to prevent their babies developing birth defects.

A gynaecologist at a Delhi hospital said many expectant mothers scheduled for July 22 caesarian
deliveries insisted on changing the date.

For others it was an auspicious date, with more than one million Hindu pilgrims gathering at the holy site of Kurukshetra in northern India, where bathing in the waters during a solar eclipse is believed to further the attainment of spiritual freedom.

Those who could afford it grabbed seats on planes chartered by specialist travel agencies that promised extended views of the eclipse as they chased the shadow eastwards.

Travel firm Cox and Kings charged 79,000 rupees (1,600 dollars) for a "sun-side" seat on a Boeing 737-700 aircraft that took off before dawn from New Delhi for a three-hour flight.
In Shanghai, hotels along the city's famed waterfront Bund packed in the customers with eclipse breakfast specials.

"The clouds move in and out, then all of a sudden you see it," said Glenn Evans, 46, a US executive with a cosmetics company who lives in Shanghai and was viewing the eclipse from a rooftop bar along the Bund.

The last total solar eclipse was on August 1 last year and also crossed China.
The next will be on July 11, 2010, but will occur almost entirely over the South Pacific, where Easter Island -- home of the legendary moai giant statues -- will be one of the few landfalls.

Tuesday, July 21, 2009

GLOBAL
--post by SMK KEAT HWA ASTRONOMY SOCIETY--








Untuk keterangan lanjut, sila layari laman web:
atau


The Universe

--post by SMK KEAT HWA ASTRONOMY SOCIETY--














The Universe is a vast expanse of space which contains all of the matter and energy in existence. The Universe contains all of the galaxies, stars, and planets. The exact size of the Universe is unknown. Scientists believe the Universe is still expanding outward. They believe this outward expansion is the result of a violent, powerful explosion that occurred about 13.7 billion years ago. This explosion is known as the Big Bang. By looking at an object's electromagnetic spectrum, scientists can determine if an object is moving away from Earth or towards Earth.
THE MOON
--POST BY SMK KEAT HWA ASTRONOMY SOCIETY--


















40TH ANNIVERSARY




Forty years ago man first walked on the moon
Forty years ago on July 20, 1969, American astronaut Neil Armstrong realized the oldest dream of human civilizations when he became the first man to walk on the moon.

As an estimated 500 million people around the world waited with bated breath and crowded around fuzzy television screens and radios, Armstrong stepped down the lunar module's ladder and onto the lunar surface.
"That's one small step for man, one giant leap for mankind," Armstrong intoned, his words slightly distorted by distance and communications equipment, in a phrase now etched forever into the history books.
The excited crowds burst into cheers as he was joined by fellow astronaut Buzz Aldrin who described the "magnificent desolation" of the lunar landscape, never before witnessed in close up on Earth.
Only 12 earthlings have walked on the surface of the moon, the Earth's lone mysterious satellite, which has fuelled our dreams and imaginations since the earliest humans walked the planet.
And the last moonwalk was already more than a generation ago in 1972.
But at the height of the Cold War, the Apollo program succeeded in proving America's dominance in the space race. Planting an American flag on the surface of the moon in 1969 scored major morale-boosting points over the Soviet Union.
The Apollo program, which led to six successful moon landings between 1969 and 1972, had begun eight years earlier in 1961 when then president John F. Kennedy threw down a bold challenge to Congress to put a man on the moon within the decade.
"I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to the Earth," Kennedy said.
The decision to shoot for the moon was above all a political one, said John Logsdon, curator and expert at the National Air and Space Museum.
The Soviet Union had been the first nation to put a satellite into orbit in 1957, with the launch of the Sputnik, and in 1961 Yuri Gagarin became the first man to fly in space.
"The Soviet Union had defined space achievement the measure of power and desirability of a modern society and President Kennedy decided that leaving a dramatic space achievement only to the USSR was not in the US interest," Logsdon told AFP.
The space race became symbolic of the Cold War battle for dominance between competing ideologies and polarized world powers.
In 1970 just months after the lunar landings, Soviet dissident Andrei Sakharov in an open letter to the Kremlin wrote that America's ability to put a man on the moon proved the superiority of a democracy.
"NASA had been studying a mission to the moon prior to Kennedy's decision and had concluded that there was no major technological barrier," Logsdon said.
"On the other hand, there was little experience in building the kind of large and complex systems required to carry out the mission."
Thanks to America's growing prosperity and their scientific and technical achievements, the US swiftly put into motion the Apollo program. In 1969 it was estimated at some 25 billion dollars -- about 115 billion at today's value, or more than six times NASA's current budget.
But the Apollo program hit some setbacks. In 1967, three astronauts were killed in an accident on the ground.
Then in December 1968 Apollo 8 blasted off, and America's first manned flight around the moon took place.
Six months later it was followed by Apollo 10, a lunar reconnaissance trip with three astronauts on board.
Then on July 16, 1969, Armstrong, the mission commander, Aldrin and Mike Collins settled themselves into the orbiting command module Columbia on the Apollo 11, which was taken up into space perched on the Saturn V rocket.
The huge rocket, towering some 111 meters (330 feet) high, lifted off from the Kennedy Space Center at 9:32 am (1332 GMT).
Four days later, Armstrong manually maneuvered the lunar module, dubbed "Eagle," to land on the moon's Sea of Tranquility.
"Houston, Tran
quility Base here. The Eagle has landed," he told mission control in Houston, Texas.
At 22:50 pm (0250 GMT), the 38-year-old Armstrong left the module and stepped down a short ladder. With a small leap, he landed on the moon's surface at 22:56pm and 48 seconds (0256 GMT).
Twenty minutes later he was joined by the 39-year-old Aldrin.
Together they spent 21 hours on the moon's surface, planting the American Stars and Stripes and a steel plaque bearing a message of peace.
They collected some 21 kilos (43 pounds) of rocks and then returned to Columbia where Collins was awaiting them for a triumphal return to Earth.
They landed back on July 24, ditching into the Pacific Ocean.


--POST BY ASTRONOMY SOCIETY OF SMK KEAT HWA --

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