FRIDAY, MAY 18, 2012
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Category: Astronomy

Are we alone?

The only evidence of life that we are aware of occurs in our planet, but man continues to search outer space for signs of other life forms. From the time of the Viking Mission to Mars until the recent research into Jupiter’s satellites, science tries to find answers. A new field of science, astrobiology, is redefining and analysing life on Earth and by doing so is creating the basis on which scientists of the future will work. If the life is implicit in the mechanisms of the universe the response waits for us out there.

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Are we alone?.

Video hosted on Youtube

R

adio telescopes scan the skies, and computers crunch the results looking for the patterns that might indicate an artificial signal coming from deep space. Alien hunters stand watch out in the desert, looking for lights in the sky flying over military bases. Both are looking for answers to the same question: Is our little civilization on our little blue planet alone in the galaxy; or are there others, like us, who want to meet us as much as we want to meet them?

There are stars in the Southern Sky…..

Southern Cross
The Southern Cross, Crux is commonly known as the Southern Cross, is the smallest of the 88 modern constellations, but nevertheless one of the most distinctive. It is surrounded on three sides by the constellation Centaurus, and to the south lies Musca. Ancient Greeks originally considered Crux to be part of Centaurus; however, the precession of the equinoxes gradually lowered these stars below the European horizon, and they were eventually forgotten. (At the latitude of Athens in 1000 BC, Crux was clearly visible, though low in the sky; by AD 400, most of the constellation never rose above the horizon for Athenians.


Eagles – Hotel California

“Seven Bridges Road”

There are stars
In the Southern sky

Southward as you go
There is moonlight
And moss in the trees
Down the Seven Bridges Road

Now I have loved you like a baby
Like some lonesome child
And I have loved you in a tame way
And I have loved you wild

Sometimes there’s a part of me
Has to turn from here and go
Running like a child from these warm stars
Down the Seven Bridges Road

There are stars in the Southern sky
And if ever you decide
You should go
There is a taste of thyme sweetened honey
Down the Seven Bridges Road

Eclipse of the Century

In Hawaii on July 11, 1991, astronomers and scientists discovered a remarkable opportunity to examine a total eclipse of the sun. Sun, moon and earth would perfectly align, achieving “totality” directly above technologically advanced observatories perched atop Mauna Kea, a dormant volcano. For the first time, giant telescopes could see behind the sizzle of the sun and begin to understand our closest star.

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NOVA (PBS) – Eclipse of the Century (1992)
(Video hosted on Youtube.)

But the project was not as simple as it seemed. In the days preceding “the eclipse of the century,” astronomers faced equipment breakdowns, incompatible telescopes, threatening weather and a celestial spectacle that would wait for no one. Join the action as scientists prepare for an unprecedented look at the normally invisible corona, the sun’s superheated atmosphere. And take a breathtaking look at the sky’s most exciting event. As seen from the Earth, a solar eclipse occurs when the Moon passes between the Sun and the Earth, and the Moon fully or partially covers the Sun as viewed from a location on Earth. This can happen only during a new moon, when the Sun and Moon are in conjunction as seen from Earth. At least two, and up to five, solar eclipses occur each year; no more than two can be total eclipses. Total solar eclipses are nevertheless rare at any particular location because totality exists only along a narrow path on the Earth’s surface traced by the Moon’s umbra.

Neil deGrasse Tyson

Ted Simons interviews a shining star in the universe of astrophysics, Neil deGrasse Tyson. The author and host of PBS NOVA ScienceNOW talks about what sparked his interest in the cosmos. Ted also asks what Tyson has against Pluto, the celestial body that was discovered at Flagstaff’s Lowell Observatory.

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Neil deGrasse Tyson
(Video hosted on Youtube.)

Neil deGrasse Tyson was born and raised in New York City where he was educated in the public schools clear through his graduation from the Bronx High School of Science. Tyson went on to earn his BA in Physics from Harvard and his PhD in Astrophysics from Columbia. Tyson’s professional research interests are broad, but include star formation, exploding stars, dwarf galaxies, and the structure of our Milky Way. Tyson obtains his data from the Hubble Space Telescope, as well as from telescopes in California, New Mexico, Arizona, and in the Andes Mountains of Chile.

In 2001, Tyson was appointed by President Bush to serve on a 12-member commission that studied the Future of the US Aerospace Industry. The final report was published in 2002 and contained recommendations (for Congress and for the major agencies of the government) that would promote a thriving future of transportation, space exploration, and national security.

In 2004, Tyson was once again appointed by President Bush to serve on a 9-member commission on the Implementation of the United States Space Exploration Policy, dubbed the “Moon, Mars, and Beyond” commission. This group navigated a path by which the new space vision can become a successful part of the American agenda. And in 2006, the head of NASA appointed Tyson to serve on its prestigious Advisory Council, which will help guide NASA through its perennial need to fit its ambitious vision into its restricted budget.

Read more…..>

Cern’s Big Bang test

Another Big Bang experiment took place inside the world’s biggest, most expensive and most powerful particle accelerator on the Swiss French border. It is seen as a beginning of understanding the origins of the universe. But what are the tangible benefits of such an experiment? Is it worth it?

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Inside Story – Cern’s Big Bang test
(Video hosted on Youtube.)

The Large Hadron Collider (LHC) is a gigantic scientific instrument near Geneva, where it spans the border between Switzerland and France about 100 m underground. It is a particle accelerator used by physicists to study the smallest known particles – the fundamental building blocks of all things. It will revolutionise our understanding, from the minuscule world deep within atoms to the vastness of the Universe. Two beams of subatomic particles called ‘hadrons’ – either protons or lead ions – will travel in opposite directions inside the circular accelerator, gaining energy with every lap. Physicists will use the LHC to recreate the conditions just after the Big Bang, by colliding the two beams head-on at very high energy. Teams of physicists from around the world will analyse the particles created in the collisions using special detectors in a number of experiments dedicated to the LHC. There are many theories as to what will result from these collisions, but what’s for sure is that a brave new world of physics will emerge from the new accelerator, as knowledge in particle physics goes on to describe the workings of the Universe. For decades, the Standard Model of particle physics has served physicists well as a means of understanding the fundamental laws of Nature, but it does not tell the whole story. Only experimental data using the higher energies reached by the LHC can push knowledge forward, challenging those who seek confirmation of established knowledge, and those who dare to dream beyond the paradigm.

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