ufo!!!!

最佳答案 - 由提问者2007-10-14 20:59:17选出

An unidentified flying object, or UFO, is any apparent flying object which cannot be identified by the observer and which remains unidentified after investigation. The term flying saucer is also sometimes used.

The post World War II UFO phase in the United States began with a reported sighting by American businessman Kenneth Arnold on June 24, 1947 while flying his private plane near Mount Rainier, Washington. He reported seeing nine brilliantly bright objects flying across the face of Rainier towards nearby Mount Adams at “an incredible speed”, which he calculated as at least 1200 miles per hour by timing their travel between Rainier and Adams. His sighting subsequently received significant media and public attention. Arnold would later say they “flew like a saucer would if you skipped it across the water” and also said they were “flat like a pie pan”, “shaped like saucers,” and “half-moon shaped, oval in front and convex in the rear. ...they looked like a big flat disk.” (One, however, he would describe later as being almost crescent-shaped.) Arnold’s reported descriptions caught the media’s and the public’s fancy and gave rise to the terms flying saucer and flying disk.