Tuesday, December 10, 2013

ScienceDaily: Astronomy News

ScienceDaily: Astronomy News

First radiation measurements from the surface of Mars

Posted: 09 Dec 2013 03:11 PM PST

In the first 300 days of the Mars Science Laboratory's surface mission, the Curiosity rover cruised around the planet's Gale Crater, collecting soil samples and investigating rock structures while the onboard Radiation Assessment Detector made detailed measurements of the radiation environment on the surface of Mars. The radiation on Mars is much harsher than on Earth for two reasons: Mars lacks a global magnetic field and the Martian atmosphere is much thinner than Earth's, providing little shielding to the surface.

2012 solar storm points up need for society to prepare

Posted: 09 Dec 2013 12:23 PM PST

A massive ejection of material from the sun initially traveling at over 7 million miles per hour that narrowly missed Earth last year is an event solar scientists hope will open the eyes of policymakers regarding the impacts and mitigation of severe space weather.

Hidden details revealed in nearby starburst galaxy

Posted: 09 Dec 2013 11:32 AM PST

Astronomers have captured never-before-seen details of the nearby starburst galaxy M82. These new data highlight streamers of material fleeing the disk of the galaxy as well as concentrations of dense molecular gas surrounding pockets of intense star formation.

Unique model simulates electron environment in space at 36000 km above the Earth

Posted: 09 Dec 2013 05:55 AM PST

A spacecraft at near-Earth orbit is continuously bombarded by charged particles. Scientists have now developed a unique model that simulates electron environment in the near-Earth space.
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