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    regolith tagged posts

    Scientists Reconstruct the History of Asteroid Collisions

    June 4, 2016, Categories  Astronomy/Space

    Craters on the surface of the asteroid 21 Lutetia. Credit: ESA

    Craters on the surface of the asteroid 21 Lutetia. Credit: ESA

    An international study reveals that asteroids have endured a multitude of impact strikes since their formation 4,565 million years ago. Scientists have reconstructed a timeline of these collisions using a physics-based model which reproduces the process through time, comparing its results with present-day information about chondrite meteorites.

    The size distribution of the objects which make up the asteroid belt between Mars and Jupiter indicates that these asteroids have been struck by projectiles >20cm in size at least 100 million times. The resultant craters from these strikes are proportional to both the diameters and the velocities of these projectiles.

    The information compiled on ordinary chondrites indicates that these m...

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    Sticky, Stony and Sizzling Science launching to ISS

    March 10, 2016, Categories  Astronomy/Space

    This is a small handheld gecko grippers and associated test hardware. Credit: NASA

    This is a small handheld gecko grippers and associated test hardware. Credit: NASA

    Orbital ATK CRS-6 will deliver investigations to the space station to study fire, meteors, regolith, adhesion, and 3-D printing in microgravity. NASA’s commercial partner plans to launch its Cygnus spacecraft into orbit on March 22, 2016 atop a United Launch Alliance Atlas V rocket for its fifth contracted resupply mission to the International Space Station. The Spacecraft Fire Experiment-I (Saffire-I) intentionally lights a large-scale fire inside an empty Cygnus resupply vehicle after it leaves the space station and before it re-enters Earth’s atmosphere.

    In the decades of research into combustion and fire processes in reduced gravity, few experiments have directly studied spacecraft fire safety under lo...

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