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Débris spatiaux : évaluation du risque   Front view of penetration of Hubble Space Telescope (HST) solar array. Clear hole size: 2.5 mm. The HST solar array was retrieved in March 2002 after 8.25 years in space. Petits mais mortels  This image shows the results of a lab test impact between a small sphere of aluminum travelling at approximately 6.8 km per sec and a block of aluminum 18 cm thick. This test simulates what can happen when a small space debris object hits a spacecraft.
Al sphere diameter: 1.2-cm
In such an impact, the pressure and temperature can exceed those found at the centre of the Earth e.g. greater than 365 GPa and more than 6,000 K. Release date: 31 mars 2005 |