Although the nature of the optic gunk remains unknown, project managers at NASA's Jet Propulsion Laboratory suspect volatile materials coming from the spacecraft after it departed Earth in February 1999.
Based in Sharjah, this Centre under the auspices of UNESCO has trained over 300 educational planners and managers over the past two years and has also facilitated access to information and materials on educational planning and management, as developed by UNESCO and regional centres of expertise.