Posts Tagged ‘Solar System’

Earth’s Cries Recorded in Space

Sunday, July 6th, 2008

Earth emits an ear-piercing series of chirps and whistles that could be heard by any aliens who might be listening, astronomers have discovered.

Scientists have known about the radiation since the 1970s. It is created high above the planet, where charged particles from the solar wind collide with Earth’s magnetic field. It is related to the phenomenon that generates the colorful aurora, or Northern Lights.

–> Link to article

–> Link to video

First images of solar system’s invisible frontier

Sunday, July 6th, 2008


NASA’s sun-focused STEREO spacecraft unexpectedly detected particles from the edge of the solar system last year, allowing University of California, Berkeley, scientists to map for the first time the energized particles in the region where the hot solar wind slams into the cold interstellar medium. Mapping the region by means of neutral, or uncharged, atoms instead of light “heralds a new kind of astronomy using neutral atoms,” said Robert Lin, UC Berkeley professor of physics and lead for the suprathermal electron sensor aboard STEREO. “You can’t get a global picture of this region, one of the last unexplored regions of the heliosphere, any other way because it is too tenuous to be seen by normal optical telescopes.”

–> Link


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