30 meters in diameter asteroids passing earth is only 150,000 kilometers away from the earth.

Despite the haze, we have fewer chances to see the stars, but just last night, a 30-metre-diameter asteroid passed by the Earth and almost made a close contact with us. Yesterday 5:30, an asteroid quietly wiped away from the Earth, the closest to the two distance of more than 60,000 kilometers, only 0.16 months distance. Zhaohaibin, a researcher at the Purple Mountain Observatory of the Chinese Academy of Sciences, introduced a conservative estimate of more than 20 asteroids flying through the Earth in March. Netizens joked: "Is this going to meet Professor?" Naughty: Asteroids fly over the tip of the Earth. Zhaohaibin, a researcher at the Purple Mountain Observatory of the Chinese Academy of Sciences, said Beijing time March 6 5:07, a 2014 DX110 asteroid, flying to Earth, its diameter is 30 meters, equivalent to 3 double-decker bus size. Fortunately, the asteroid eventually passed between the Earth and the moon at a speed of 53,000 kilometers per hour. It and the Earth only recently 350,000 kilometers, than the Earth and the moon's average distance (380,000 km) is also small. Just as the scientists breathed a sigh of relief, there were asteroids flying around the earth. 6th 11:20, an intimate dating of the asteroid and Earth, numbered 2014 EF, and the nearest distance to Earth is 152,000 km. More than 30 minutes later, another asteroid to date, around 12 o'clock noon, numbered 2014do7 asteroid, and the Earth secretly tryst, the nearest distance of more than 7.6 million kilometers. 7th 5:30, the asteroid, numbered 2014 EC, dates the Earth at close range, and, most recently, is just over 60,000 kilometers, the equivalent of flying over the tip of the Earth. In the end, the 2014 EC safely flies over the Earth, giving everyone a big sigh of relief. Soy sauce: None of them are in conflict with the Earth. Zhaohaibin says asteroids are considered potentially dangerous asteroids when they fly over the earth and are less than 20 months away (7.6 million kilometers apart). Fortunately, they are all to soy sauce, have been safely flown around the Earth, not captured by the Earth. It is reported that if the asteroid to be captured by the Earth to meet two conditions, one is that it is small enough to be attracted by the gravity of the earth, and they run slowly, less than the speed of the Earth's escape speed of 11.2 km/sec. These asteroids are very fast, exceeding the Earth's escape velocity. But suppose the 2014 EC asteroid hit the Earth, what would be the consequences? Zhaohaibin said, like the meteorite that landed in Russia last year, people would hear loud noises. Fortunately, these asteroids usually crash in the ocean, desert or Antarctica. The sky looks forward to more than 20 asteroids that will date the Earth. In fact, all March, asteroids are very lively. According to Zhaohaibin, an international asteroid astronomical Organization, more than 20 asteroids were flown to Earth in March. The largest of the asteroid diameter of 1.4 km, numbered 2003 QQ47, it will fly on 26th, but also soy sauce, the nearest distance is 49.9 months distance. So many asteroids to date with Earth,@NASA Chinese said, will it be to come to the professor? Netizens are also joking, saying, "You from the Stars," the professors will not be flying these asteroids? However, joking, Zhaohaibin said, so many asteroids in one months to fly the Earth, is actually a normal phenomenon. 1