NASA said yesterday that an unknown piece of space debris was detected near the international space station. The space station carried out a & quot; avoidance maneuver on Tuesday night to get rid of debris orbiting the earth. &There was no danger to the crew, NASA wrote in a blog post. According to NASA, thrusters on an unmanned Progress cargo ship connected to the station are used to lift the station’s orbit. < / P > < p > during the maneuver, the astronauts on the space station move to the Russian section so that they are closer to the Soyuz passenger spacecraft. After 150 seconds of operation, the crew started normal activities again. < / P > < p > it is not clear what space debris is, but NASA says flight controllers in Houston are tracking the object with the assistance of USCOM. On one occasion, it was expected to come within 1.39 kilometers (0.86 miles) of the space station. < / P > < p > the international space station has been hit by small space debris before. It has also managed to avoid more dangerous space debris. In 2015, the station adjusted its orbit to avoid debris from a Minotaur rocket launched two years ago. At that time, they also used the thrusters of the attached & quot; progress & quot; spacecraft to lift the station’s orbit. < / P > < p > with the passage of time, the problem of space waste will only become more and more serious. On twitter, NASA director Jim bridenstein mentioned that in 2020 alone, the station had made three maneuvers to avoid debris. < / P > < p > as space becomes more crowded and several giant satellite constellations are under construction, NASA is still worried about the messy low earth orbit of space debris. SpaceX beat blue origin and Northrop Grumman to win a $316 million air force contract

By ibmwl