it was magical!
Wednesday, September 3, 2008
Thursday, August 28, 2008
Monday, August 11, 2008
Meteor shower!
Meteors streak past stars over a Bedouin tent near Amman, Jordan, in the early hours of August 12, 2004.
There is another one to between tonight and the early hours of the morning. Under perfect conditions, observers can expect to see about 90 to100 meteors an hour!
But the Perseids will put on a good show as seen from almost any place on Earth for several reasons.
The moon will set relatively early, making the sky darker and allowing observers to see fainter meteors.
Also, the region in the sky where the meteors appear to come from will rise up higher as the night progresses, so fewer meteors will shoot below the horizon.
Meteors higher in the sky also appear brighter, because they are seen through less distortion-causing atmosphere.
Hally, the meteor buff, says that people who want to see the largest number of meteors possible should find the darkest sky available and face northeast, where the meteors will appear to come from.
Lets get invisible .
WASHINGTON (AP) -- Scientists say they are a step closer to developing materials that could render people and objects invisible.
Researchers have demonstrated for the first time they were able to cloak three-dimensional objects using artificially engineered materials that redirect light around the objects.
Previously, they only have been able to cloak very thin two-dimensional objects.
The findings, by scientists at the University of California, Berkeley, are to be released later this week in the journals Nature and Science.
The new work moves scientists a step closer to hiding people and objects from visible light, which could have broad applications, including military ones.
People can see objects because they scatter the light that strikes them, reflecting some of it back to the eye.
Cloaking uses materials, known as metamaterials, to deflect radar, light or other waves around an object.
Metamaterials are mixtures of metal and circuit board materials such as ceramic, Teflon or fibre composite.
Researchers have demonstrated for the first time they were able to cloak three-dimensional objects using artificially engineered materials that redirect light around the objects.
Previously, they only have been able to cloak very thin two-dimensional objects.
The findings, by scientists at the University of California, Berkeley, are to be released later this week in the journals Nature and Science.
The new work moves scientists a step closer to hiding people and objects from visible light, which could have broad applications, including military ones.
People can see objects because they scatter the light that strikes them, reflecting some of it back to the eye.
Cloaking uses materials, known as metamaterials, to deflect radar, light or other waves around an object.
Metamaterials are mixtures of metal and circuit board materials such as ceramic, Teflon or fibre composite.
Sunday, August 3, 2008
Wednesday, July 30, 2008
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