NASA’s new $16 million probe, called the Near-Earth Asteroid Scout will use solar sail to reach its destination. Solar sails are made of ultrathin, highly reflective material. When a photon from the sun hits the mirror-like surface, it bounces off the sail and transfers its momentum to the spacecraft. The continuous thrust provided by sunlight will accelerate the probe to a speed of 28.6 km/s relative to the sun. Read More>>