Posts Tagged ‘energy’

Universe

Thursday, June 10th, 2010

Is it possible for distant galaxies to be moving away from us faster than the speed of light?

And if it is would it be possible for us to see them?

Surprisingly the answer to both questions is a resounding YES.

How is that possible? How can something travel faster than the speed of light?

Today we will try and paint an accurate picture of the universe based on the Lambda-Cold-Dark-Matter model, which is the best cosmological model today.

Once we have painted that picture, the answers to our questions will be straightforward.

Duration : 0:12:55

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Horizon: Is Everything We Know About the Universe Wrong? (Part 1 of 6)

Friday, April 30th, 2010

Horizon: Is Everything We Know About the Universe Wrong? (2010)

Part 1: http://www.youtube.com/watch?v=ge6RjTgyLr0
Part 2: http://www.youtube.com/watch?v=Ij5q8WVyNVI
Part 3: http://www.youtube.com/watch?v=KPDd3Umv06c
Part 4: http://www.youtube.com/watch?v=KF-N4_zfGJI
Part 5: http://www.youtube.com/watch?v=2ElbuzKrTkk
Part 6: http://www.youtube.com/watch?v=X4rv9BqTWzI

Runtime: 00:58:56

There’s something very odd going on in space, something that shouldn’t be possible. It is as though vast swathes of the universe are being hoovered up by a gigantic and invisible celestial vacuum cleaner.

Sasha Kaslinsky, the scientist who discovered the phenomenon, is understandably nervous: ‘It left us quite unsettled and jittery,’ he says, ‘because this is not something we planned to find.’ The accidental discovery of what is ominously being called ‘dark flow’ not only has implications for the destinies of large numbers of galaxies but threatens to overturn our current understanding of the birth and evolution of the universe.

Does dark flow herald a new era of cosmological understanding, or does it simply mean that everything we know about the universe is wrong?

Another brilliant documentary from the BBC’s ‘Horizon’ series.

Duration : 0:9:56

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What Hubble Taught Us About The Planets

Sunday, February 14th, 2010

Hubblecast 27: What Hubble Taught Us About The Planets.

For nineteen years, NASA/ESA’s Hubble Space Telescope has made some of the most dramatic discoveries in the history of astronomy but it has also helped scientists learn more about our own Solar System. From its vantage point 600 km above the Earth, Hubble has studied every planet in our Solar System except Mercury where light from the Sun would damage its instruments.


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Hubble has captured the impact of a comet on Jupiter, immense storms on Neptune and even tiny dwarf planets at the edge of our Solar System. The veteran telescope keeps a watchful eye on our solar backyard.

Regarded by many as the most valuable astronomical tool, the Hubble Space Telescope is approaching its 19th anniversary in space. Hubble sees into the far reaches of the universe but its powerful instruments have also surveyed our planetary neighbours. In this episode, well see what Hubble has revealed to us in our own solar backyard.

Even those who, for some strange reason, arent astronomy enthusiasts are likely to recognise some of Hubbles most famous images, like the “Pillars of Creation”in the Eagle Nebula or the Hubble Deep, and Ultra Deep, Fields which have shown us some of the most distant galaxies ever observed. The Hubble Space Telescope has really fundamentally changed our understanding of the Universe at large, but with its high resolution images of planets and moons in our own Solar System, it has also taught us a lot about our own cosmic neighbourhood.

Hubble cannot observe our Sun, or the closest planet, Mercury, because its instruments are light-sensitive and would be damaged. However, the telescope has examined every other planet in the solar system, including dwarf planets Pluto, Ceres and Eris. But, of course, Hubble does not just produce pretty pictures, it provides planetary scientists with vital information about our neighbours that may help us better understand our own home planet, Earth.

More (PDF): http://www.spacetelescope.org/videos/scripts/hubblecast27a.pdf

Credits:
• ESA/Hubble (Martin Kornmesser, Colleen Sharkey & Lars Lindberg Christensen)
• Visual design & Editing: Martin Kornmesser
• Animations: Martin Kornmesser
• Host: Dr. J
• Narration: Robert Fosbury
• Cinematography: Peter Rixner
• Music: movetwo
• Web Hosting: Leibniz-Rechenzentrum (LRZ)
• Web Technical Support: Lars Holm Nielsen & Raquel Yumi Shida
• Written by: Lars Lindberg Christensen
• Directed by: Colleen Sharkey
• Additional photos and footage: United States Air Force photo by Senior Airman Joshua Strang, NASA-JPL/ESA, NASA/JHU/APL,

Dr. J is a German astronomer at the ESO. His scientific interests are in cosmology, particularly on galaxy evolution and quasars. Dr. J’s real name is Joe Liske and he has a PhD in astronomy.

Hubble European Space Agency Information Centre
Garching/Munich, Germany
• http://www.eso.org
• http://www.spacetelescope.org
• http://hubblesite.org
.

Duration : 0:6:44

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Holographic Universe (Part 1 of 2 ) its all illusion.

Thursday, February 4th, 2010

The holographic universe proves that the physical world we believe is real is in fact illusion. Energy fields are decoded by our brains into a 3D picture, to give the illusion of a physical world.

Duration : 0:10:25

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The Space Elevator

Thursday, January 28th, 2010

The Space Elevator will reduce the cost of getting from earth to space. It will also allow us to take very large payloads into space very easily, very safely. Because of that, we can build cities on the moon. We can build space stations. We can build large solar arrays in space to collect energy from the sun and beam it down to earth.

How would space elevator affect the average person?

Through for example much faster telecommunication rates — you can have any kind of data rates you want, and videophones will be as common as a cell phone. And the solar power energy we’ll collect can relieve our dependence on oil. That in itself will change a lot of things it will reduce pollution and it will change world politics, hopefully even stopping some of the conflicts.

Duration : 0:9:49

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