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Under special circumstances, it is not possible to access the motor vehicles on the ground.
Spacecraft flew hundreds of thousands to hundreds of millions of kilometers from the earth, injecting speed when the size and direction of a slight error, arrived at target planets will appear large deviation error, for example, when Mars probe injecting speed 1 m/s speed (about one over ten thousand), arrived at Mars, about 100000 km distance deviation. Therefore, precise control and navigation must be carried out during the long flight. Flying to the moon is usually controlled by the orbital control system of the ground and space probe (see orbit control). Interplanetary flight distances, radio signal transmission time is long, the real-time remote control, can't so planets and interplanetary spacecraft orbit control system shall have the ability of autonomous navigation (see interstellar travel navigation and control). The United States, for example, "pirates" spacecraft in space flight of more than eight hundred million km, for 11 months of 2000 times of autonomous orbit adjustment, the final surface to achieve a soft landing on Mars, placement accuracy up to 50 km. In addition, in order to ensure the accuracy of the orbit control engine, the communication antenna is always aimed at the earth, and other systems work normally, and the detector has the autonomous attitude control ability
Adults love to spice up their parties with something a little risqu? every so often. There are numerous ways to incorporate a grown-up vibe in the birthday celebration theme. The most critical factor is actually the guest of honor will love a grownup party theme. It doesn't have to be bawdy to have adult party games.
After beating Manchester United 3-1 at Wembley on Saturday night, Barcelona ends the hugely-successful season such as the La Liga crown. Saturday's victory over Manchester United will be the second Champions League triumph in 3 years for Barcelona as well as the fourth crown since 1992. Having flown back from London on Sunday afternoon, FC Barcelona's players have spent the time celebrating the victory with fans. An estimated million fans gathered on the streets when the FC Barcelona paraded the European Cup and La Liga trophies facing open-top bus through the airport to their Camp Nou home. After the parade, the complete team will attend the concert by Shakira - the girlfriend of central defender Gerard Pique ' at the Nou Camp stadium.
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