Tilting solar sails will ease geostationary congestion

 作者:蔡垣娌     |      日期:2017-11-22 02:01:00
SOLAR sails could relieve traffic congestion in the skies above Earth. For a satellite to hover above a point on Earth’s surface, its orbit must encircle the equator. Such geostationary orbits allow uninterrupted communication or imaging, but room for new satellites is beginning to run out. “It’s a finite natural resource, a unique circle around Earth,” says Colin McInnes of the University of Strathclyde in Glasgow,