If you have a 230-ft. rocket filled high with 76,000 gallons of explosive fuel sits on the launch pad, the President in the stands and millions around the world waiting to fly to the great machine to see, you would be sure not to plan the event for a spring afternoon Florida, though the bad weather is to destroy the whole party. These are exactly the conditions in which the SpaceX Falcon 9 rocket with astronauts Bob Behnken and Doug Hurley tried and failed to rise to the launch pad on 27 May, for the first historic launch manned American soil since 2011. The flight has Scrubbed left not only NASA and SpaceX select a day and time when the forecast is clear a lot of people ask why? The answer: It is not for them. It is up to physics. If you try to start any old spaceship in orbit any old, you could actually choose just about any old time to fly. But things are rarely that simple, especially if you are already proven in orbit with another object by appointment – in this case the International Space Station (ISS). Pulling a delicate pas de deux of the precise timing rule requires the funds in a period of fixed time on a fixed day to start within what is known as the “launch window.” The most striking object in orbit, astronauts have tried using Rendezvous, Luna. Back in the days of the Apollo program, the trick was not to judge where the moon at launch in the sky, but where it was three days later, when the earth had covered spacecraft Moon distance. With the moon to the earth in 3683 km per hour orbits (2288 hours miles), which took a bit ‘of careful planning. Things were even more difficult by the fact that only reached in the vicinity of the moon was not enough; after covering 386,000 kilometers (240,000 miles.), the crews were headed lunar orbit only 97 km (60 miles) above the surface of the moon to come. This is not only because it is in a terminal area of a football field and areas to point to the other end to an apple, it’s like trying the apple with the ball on the skin. The Apollo crews try to get to the landing on the moon during the optimal light conditions when the sun is at the correct angle in the lunar sky shadow was that it would emphasize, but do not overdo the ground. That further reduced launch window. If all these restrictions meant the rain begin to look for and is in the clouds for a break, hoping that what must be done. always easier only in Earth orbit, but the sore head window presents the launch of his own. Spacecraft typically do not orbit the planet spotless orbits that take them around and around the equator. Rather, they are called into being in orbits that are inclined at inclinations with respect to the equator. Cape Canaveral is the width is about 28 degrees, then a spacecraft orbiting from Kennedy Space Center has launched inclined similar flies, such as a hula hoop monkey, the displacement of 28 degrees above and below the equator, while traveling around the world. Things get even more complicated. Earth itself is tilted 23 degrees, and during the planet takes to make a space of 24 hours, a spacecraft needs only 90 minutes a complete orbit. The result: on a flat map would seem to label the probe a kind of sine wave path above and below the equator of movement, switch not exactly the same point on the ground to two successive orbits. The ISS orbits at a greater inclination of 51.6º concession made to the United States to Russia, began his spaceship to the north, from the Baikonur Cosmodrome in Kazakhstan. Planner flying astronauts to the ISS, where Behnken and Hurley were mentioned have their start time if and when the station in an optimal position for the appointment occurs at all and brand, if possible, send the monitoring time as short as possible , unmanned cargo missions will be sent from Baikonur to the space station, it can be relatively large launch window have up to a two-day flight is required on the station. But not load kvetch complaints. manned missions often have narrow windows that astronauts and cosmonauts to catch up with the ISS can be in just four lanes to six hours gets rid as soon as possible from the confines of their spaceship. started for Behnken and Hurley, from Cape Canaveral on its 28 ° of latitude, in 51.6º inclination indicates the ISS a relatively long time tracking 19 hours. But it would be much longer if they have selected the wrong start window. By the time suggested that the window was closed on May 27, the historic mission of SpaceX is looking for a new one that would allow Saturday, May 30 at 03:22 EDT takeoff, when the window is closed is closed, also it includes the following opens the next day at 03:00 EDT. You can use the next experiments to observe here. Place as people have said and said and said again is difficult. Sometimes the hardest part is to get out of all but the floor.
Science > Because SpaceX needs the historical mission, to wait until Saturday for a second attempt