On July 9, 2010 (May 28, 2010 lunar calendar), the world's first "solar sailing ship" successfully achieved body speed change. The Japan Aerospace Exploration Agency announced on July 9, 2010 that the world's first space sailing ship "Icarus" powered solely by sunlight has successfully used the pressure of sunlight to achieve body speed change. At present, "Icarus" is about 19 million kilometers away from the earth, flying towards Venus at a speed of 26 kilometers per second. With the change of the angle of sunlight, its speed is expected to be further increased in the future. The pressure of sunlight is extremely small, and the sail with an area of about 200 square meters receives the sun's light energy and is subject to a pressure of about 0.1 grams. Nonetheless, in the absence of gravity and air resistance, over time, the pressure of sunlight gives the sailboat a huge acceleration. It is reported that the next step of "Icarus" will be to conduct direction control experiments. The sail of "Icarus" is about 14 meters square, made of polyimide resin, and the sail thickness is about 7.5 microns. Comments: Little Japan is pretty good, China also needs to work hard