BBC Horizon 2005 Titan A Place Like Home

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BBC Horizon 2005 Titan A Place Like Home

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Name:BBC Horizon 2005 Titan A Place Like Home

Total Size: 449.90 MB

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Stream: Watch Full Movie @ Movie4u

Last Updated: 2012-08-15 02:59:35 (Update Now)

Torrent added: 2009-08-23 01:25:37

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BBC.Horizon.2005.Titan.A.Place.Like.Home.avi (Size: 449.90 MB) (Files: 1)


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HORIZON 2005 Titan - A Place Like Home


Over a billion kilometres away, Saturn's largest moon, Titan, holds tantalising clues to how

life began here on Earth

In the most ambitious and expensive interplanetary space mission of all time, the Cassini-

Huygens spacecraft made a seven-year trek across the Solar System to attempt first contact

with the Earth-like moon of Titan by landing a probe on its unseen surface.

The first close up images of Saturn and its many moons were taken in the early 1980s by the

Voyager One Deep Space Probe. One moon stood out from all the rest, the mysterious moon of

Titan. Unlike any moon that had ever been seen, it had a thick almost Earth-like atmosphere.

It was also shrouded in a thick orange haze which prevented Voyager from seeing down to the

moon's surface. Scientists knew they had to go back.

Launched in 1997, the Cassini-Huygens spacecraft was the result of a unique transatlantic

$3.2 billion collaboration between NASA and the European space agencies. Steered from NASA's

JPL mission control in Pasadena California, the craft took seven years to reach Saturn. It

took a long slingshot route via Venus twice, the Earth and Jupiter to pick up enough speed

to reach its final destination.

When it finally arrived in July 2004, the spacecraft had to carry out a very dangerous

manoeuvre and pass between Saturn's rings in order to get into orbit around the giant

planet. Even the tiniest grain of dust could have ripped through the spacecraft and

destroyed the mission.

On Christmas Day 2004, the European-built Huygens probe was finally released from the

Cassini mothership, ready to descend to Titan. The probe's trajectory had to be absolutely

spot on, as without any engines even a slight misjudgement could not be corrected later and

would mean Huygens missing its target altogether.

January 14 2005. The Huygens probe finally reached Titan's upper atmosphere. Mission control

had now transferred to ESA in Darmstardt, Germany, but all the scientists could do was sit

and wait, as the probe was running on automatic. For any chance of success, the probe's heat

shield had to protect the craft from the fierce temperatures of re-entry, and its three

parachutes had to deploy correctly in sequence to slow its descent.

Amazingly, long before they expected to hear from Huygens, the probe's faint carrier signal

was picked up on Earth by the massive Robert C Byrd radio telescope at Greenbank in West

Virginia. Not much stronger than a mobile phone, and travelling over a billion kilometres

through space, the signal was too weak to carry any real data, but at least they knew the

probe had survived entry and was now under parachute.

Some hours later, the scientific data finally started coming through, relayed via the

orbiting Cassini. To their horror, one of the vital data-streams had not been switched on.

Fortunately most of the data was coming through on the single channel, but crucially half

the images were lost.

After years of waiting, Titan was finally revealed. With Huygens built to sniff and taste

the atmosphere on its way down, it discovered it was similar in many ways to that of the

Earth in its infancy, four billion years ago. Titan's chemistry is still a long way from

what we see as 'living', yet it was found to contain a rich cocktail of organic carbon-based

chemicals, thought to be important as the precursors to life.

Now visible beneath the impenetrable orange haze, Titan appears to look a lot like Earth.

The images beamed back from over a billion kilometres away show lake beds, river channels,

gulleys and canyons. But these river channels are gouged not by water, but by a rain of

liquid methane. The surface itself is not made of rock, but of solid ice, and Huygens'

landing site was strewn with small round ice pebbles, lying in a bed of icy sand grains.

Although home to a somewhat cold alien chemistry, in many respects Titan is driven by

exactly the same geological and meteorological processes that shape and contour our own

planet. Titan is certainly a place like home.

Technical Specs

Video Codec: Divx 5.21
Video Bitrate: 1119 kb/s
Video Resolution: 720x400 (1.80:1)
Video Aspect Ratio: 16:9
Audio Codec: MP3
Audio BitRate: 160 kb/s (80/ch, stereo) CBR 44100 Hz
Audio Channels: 2
RunTime Per Part: 49m
Part Size: 449mb
Ripped by cotcubt (UKNova)

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