IN SPITE OF GREAT ADVANCES IN FORMAL METHOD IN SOCIAL SCIENCE, MUCH OF THE UNDERSTANDING OF PERSISTING AND GENERAL RELATIONSHIPS DEPENDS UPON A GRASP THAT IS TOTALLY INDEPENDENT OF SOME FORMAL METHOD. IN ADVANCING SOCIAL SCIENCE, WE INVENT AND PRACTICE TECHNIQUE AND CULTIVATE A HUMANISTIC ART. (Robert Redfield)

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ADIVASI (Tribes of India) Ethnographic Films by SATHYA MOHAN PV

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Sunday, August 14, 2011

Voyage to Pandora: First Interstellar Space Flight



by SpaceRip

Pandora is the idyllic blue world featured in the movie 'Avatar.'
Its location is a real place:
Alpha Centauri , the nearest star to our Sun and the most likely destination for our first journey beyond the solar system.

Remarkably, it's anti-matter, the 'science fiction' fuel of choice that could take us there. Normally, it's only created in powerful jets that roar out of black holes.

We can now produce small quantities in Earth-bound particle colliders.

Will we journey out only to plunder other worlds?

Or will we come in peace?

The answer may depend on how we see Earth at that time in the distant future.

The year is 2154. Our planet has been ruined by environmental catastrophe. In the movie Avatar, greedy prospectors from Earth descend on the world of an innocent hunter-gatherer people called the Na'vi.

Their home is a lush moon far beyond our solar system called Pandora.

Could such a place exist?

And could our technology... and our appetite for exploration... one day send us hurtling out to reach it?

In fact, the supposed site of this fictional solar system is one of our most likely interstellar targets, until a better destination turns up.

Pandora orbits a fictional gas planet called Polyphemus. Its home is a real place... Alpha Centauri... the brightest star in the southern constellation of Centaurus.

At 4.37 light years away, it's part of the closest star system to our sun. Alpha Centauri is actually two stars, A and B, one slightly larger and more luminous than our own sun, the other slightly smaller.

The two stars orbit one other, swinging in as close as Saturn is to our Sun... then back out to the distance of Pluto. This means that any outer planets in this system... anything beyond, say, the orbit of Mars... would likely have been pulled away by the companion and flung out into space.

For this reason, Alpha Centauri was not high on planet hunters' lists... until they began studying a star 45 light years away called " Gamma Cephei." It has a small companion star that goes around it every 76 years. Now, it seems... it also has at least one planet.

That world is about the size of Jupiter, and it has planet hunters excited. Perhaps two-thirds of all the stars in our galaxy are in so-called binary relationships. That means there could be many more planets in our galaxy that astronomers once assumed.

At least three teams are now conducting long-term studies of Alpha Centauri... searching for slight wobbles in the light of each companion star that could indicate the presence of planets. If they find a planet that passes in front of one of the stars, astronomers will begin intensive studies to find out what it's like.

One of their most promising tools will be the James Webb Space Telescope, scheduled for launch in 2014 or 2015.

From a position a million miles away from Earth, it will deploy a sun shield the size of a tennis court, and a mirror over 21 feet wide. The largest space telescope ever built, it will offer an extraordinary new window into potential solar systems like Alpha Centauri.

With its infrared light detectors, this telescope will be able to discern the chemical composition of a planet's atmosphere... and perhaps whether it harbors a moon like Pandora. One prominent planet hunter predicted that if a habitable world is found at Alpha Centauri, the planning for a space mission would begin immediately.

Here's that star duo as seen by the Cassini spacecraft just above the rings of Saturn.

To actually get to this pair of stairs, you have to travel as far as the orbit of Saturn, then go another 30,000 times further. Put another way, if the distance to Alpha Centauri is the equivalent of New York to Chicago, then Saturn would be just... one meter away.

So far, the immense distances of space have not stopped us from launching missions into deep space. In 1977, the twin Voyager spacecraft were each sent on their way aboard Titan 3 Centaur rockets.

After a series of gravitational assists from the giant outer planets, the spacecraft are now flying out of the solar system at about 40,000 miles per hour.

They are moving so quickly that they could whip around the Earth in just 45 minutes, twice as fast as the International Space Station. Voyager I has now traveled over 110 astronomical units. That's 110 times the distance from Earth to the Sun... or about 10 billion miles. But don't hold your breath.

If it was headed in the right direction, it would need another 73,000 years to travel the 273,000 astronomical units to Alpha Centauri.

When it comes to space travel, we've yet to realize the dream forged by rocketeers a century ago...


ANCIENT ALIENS - PLAYLIST




Saturday, August 13, 2011

Ancient Discoveries {s01e01} - Ancient Computer?



Roman Empire 27 BC - 476 AD. The Romans, always inspire from the Greeks, because the Greeks were older and had the most advanced Civilization and Technology. That's the reason, that always you here: a Greek doctor, a Greek architects, a Greek mathematician, a Greek scientist, a Greek technologies, a Greek war-Machines, a Greek Philosopher e.t.c.
This episode investigates the Antikythera Mechanism, a computer-like device that may have been used to calculate the movements of stars and planets. It also highlights ancient inventors Archimedes and Ctesibius.

How TV Ruined Your Life (BBC 2 TV Series)

FEAR (Part-1)

THE LIFE CYCLE (Part-2)

ASPIRATION (Part-3)

LOVE (Part-4)

PROGRESS (Part-5)

KNOWLEDGE (Part-6)


Friday, August 5, 2011

What Are We Really Made Of ?



Hosted by Morgan Freeman, Through the Wormhole will explore the deepest mysteries of existence - the questions that have puzzled mankind for eternity. What are we made of? What was there before the beginning? Are we really alone? Is there a creator? These questions have been pondered by the most exquisite minds of the human race. Now, science has evolved to the point where hard facts and evidence may be able to provide us with answers instead of philosophical theories. Through the Wormhole will bring together the brightest minds and best ideas from the very edges of science - Astrophysics, Astrobiology, Quantum Mechanics, String Theory, and more - to reveal the extraordinary truth of our Universe.

Tuesday, August 2, 2011

Through the Wormhole - Are We Alone ?



Hosted by Morgan Freeman, Through the Wormhole will explore the deepest mysteries of existence - the questions that have puzzled mankind for eternity. What are we made of? What was there before the beginning? Are we really alone? Is there a creator? These questions have been pondered by the most exquisite minds of the human race. Now, science has evolved to the point where hard facts and evidence may be able to provide us with answers instead of philosophical theories. Through the Wormhole will bring together the brightest minds and best ideas from the very edges of science - Astrophysics, Astrobiology, Quantum Mechanics, String Theory, and more - to reveal the extraordinary truth of our Universe.