Physics

Physicists create tractor beam for microscopic particles

(Phys.org)—New York University physicists have created a tractor beam capable of pulling particles micrometers in size. This so-called optical conveyor tractor beam, reported in the journal Physical Review Letters, has a range of potential applications, from microfluidics in the near term to far-out applications like collecting dust samples from comet tails.

Students Conduct Live Conversation With Orbiting NASA Astronauts

More than 9,500 student participants from the Student Spaceflight Experiments Program (SSEP) took part in a live video downlink with International Space Station Expedition 33 Commander Sunita Williams and Flight Engineer Kevin Ford.

NASA Rover Providing New Weather and Radiation Data About Mars

Observations of wind patterns and natural radiation patterns on Mars by NASA's Curiosity rover are helping scientists better understand the environment on the Red Planet's surface.

NASA's Great Observatories Find Candidate for Most Distant Galaxy

By combining the power of NASA's Hubble and Spitzer space telescopes and one of nature's own natural "zoom lenses" in space, astronomers have set a new record for finding the most distant galaxy seen in the universe.

Students Conduct Live Conversation With Orbiting NASA Astronauts

More than 9,500 student participants from the Student Spaceflight Experiments Program (SSEP) took part in a live video downlink with International Space Station Expedition 33 Commander Sunita Williams and Flight Engineer Kevin Ford.

Time and Space, Remapped | Cosmic Variance

A short two-person dance, with a twist. Or more accurately, a shear: time is remapped so that there is a delay that increases as you move from the top of the frame down to the bottom. Or in math: (x’, y’, t’) = (x, y, t – y), in some units. Via Terence Tao and Alex Fink.

Sisyphean task for polar molecules

A new cooling method for polyatomic molecules paves the way for the investigation of molecular gases near absolute zero temperature.

Building molecular engine: Researchers induce uniform oscillation from random noise of single hydrogen molecule

(Phys.org)—A team of physicists working in a lab at Free University of Berlin have succeeded in causing a quartz cantilever to oscillate uniformly using the random vibrations of a single hydrogen molecule. This effect was achieved, the team reports in their paper published in the journal Science, by exciting a hydrogen molecule with electrons and through the use of a crystal that is known for stable oscillations.

NASA'S Phonesat Wins 2012 Popular Science Best of What's New Award

NASA's PhoneSat project has won Popular Science's 2012 Best of What's New Award for innovation in aerospace.

NASA's Kepler Completes Prime Mission, Begins Extended Mission

NASA is marking two milestones in the search for planets like Earth; the successful completion of the Kepler Space Telescope's 3 1/2- year prime mission and the beginning of an extended mission that could last as long as four years.

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