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Physics and Astronomy News Archive: August 2005

Image: Of Friction and 'The Da Vinci Code'
Of Friction and 'The Da Vinci Code'
Source: LBNL   Posted: 8/28/05
Scientists have used Da Vinci's principles of friction and the geometric oddities known as quasicrystals to open a new pathway towards a better understanding of friction at the atomic level.

Image: Earth's core rotates faster than its crust, scientists say
Earth's core rotates faster than its crust, scientists say
Source: UIUC   Posted: 8/28/05
Scientists have ended a 9-year-old debate by proving that Earth’s core rotates faster than its surface, by about 0.3 to 0.5 degree per year.

Image: Burning asteroids may play ‘more important climate role than previously recognized’
Burning asteroids may play ‘more important climate role than previously recognized’
Source: Sandia   Posted: 8/28/05
Dust from asteroids entering the atmosphere may influence Earth’s weather more than previously believed, researchers have found.

Image: Climate Model Links Higher Temperatures to Prehistoric Extinction
Climate Model Links Higher Temperatures to Prehistoric Extinction
Source: UCAR   Posted: 8/28/05
Latest research simulations support a theory that an abrupt and dramatic rise in atmospheric levels of carbon dioxide triggered the massive die-off 251 million years ago.

Image: Wake-up Call for Innovation
Wake-up Call for Innovation
Source: Gatech   Posted: 8/24/05
Other countries make strides in science and technology, threatening U.S. competitive edge.

Image: Despite gains, women still face bias in science careers
Despite gains, women still face bias in science careers
Source: Wisc   Posted: 8/18/05
Despite gains in the training of women scientists and the implementation of programs to help women overcome ingrained barriers, the career path of most women scientists at universities remains a difficult trek.

Image: Researchers Carve with Electricity at the Nanometer Scale
Researchers Carve with Electricity at the Nanometer Scale
Source: NSF   Posted: 8/18/05
By applying electric current through a thin film of oil molecules, engineers have developed a new method to precisely carve arrays of tiny holes only 10 nanometers wide into sheets of gold.

Image: Mars Reconnaissance Orbiter Mission Status
Mars Reconnaissance Orbiter Mission Status
Source: NASA   Posted: 8/18/05
NASA's Mars Reconnaissance Orbiter, launched on Aug. 12, has completed one of the first tasks of its seven-month cruise to Mars, a calibration activity for the spacecraft's Mars Color Imager instrument.

Image: A New Twist to Dating an Asteroid
A New Twist to Dating an Asteroid
Source: Northwestern   Posted: 8/18/05
It turns out you can’t accurately date an asteroid by counting the impact craters on its surface -- the traditional method for determining an asteroid’s age.

Image: Caltech Scientists Create Tiny Photon Clock
Caltech Scientists Create Tiny Photon Clock
Source: Caltech   Posted: 8/4/05
Physicists at Caltech have created the first micro-mechanical device that has been operated at a steady frequency by the action of photons alone.

Image: Tandem Ions May Lead the Way to Better Atomic Clocks
Tandem Ions May Lead the Way to Better Atomic Clocks
Source: NIST   Posted: 8/4/05
Physicists at NIST have used the natural oscillations of tandem ions, confined in a single trap, to produce the “ticks” that may power a future atomic clock.

Image: NASA's Spitzer Finds Hidden, Hungry Black Holes
NASA's Spitzer Finds Hidden, Hungry Black Holes
Source: NASA/JPL   Posted: 8/4/05
With its sharp infrared eyes, NASA's Spitzer Space Telescope peered through walls of galactic dust to uncover what may be the long-sought missing population of hungry black holes known as quasars.



Science Quote

'Restlessness and discontent are the first necessities of progress.'

Thomas Alva Edison
(1847-1931)


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