The heavenly journey went against the scientific and natural laws of today such as: the law of gravity of the earth; its speed of travel of 25,000 miles per hour; the weightlessness of an object that is outside of the airspace of earth; the fact that it is not possible to breathe the air that is outside our atmosphere; the various cosmic rays; meteorites and air pressure; and the speed of light that goes at the speed of approximately 300,000 kilometers a second; and other such examples.
Fortunately however, it must be known that through scientific research and investigation, the space scientists of the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was about the size of a basketball, weighed only 183 pounds, and took about 98 minutes to orbit the Earth on its elliptical path, on October 4, 1957. They were able to demonstrate to mankind with ease, that they could overcome such problems as the gravitational pull, cosmic rays, problems with breathing in space, and others, through various technologically designed and built equipment and instruments.
Even today, the space science research is ever increasing and the scientists and researchers are confident that in a matter of time, they will be able to place life on one of the planets in our solar system; just as today, they have opened up the exploration to the moon and the planet Mars.
These scientific progresses and advancements in technology and industry are a clear proof that such a celestial travel (that of the Holy Prophet Muhammad, peace and blessing be upon him and his progeny on the night of Meraj) is possible and can not be classified as something that was impossible.So I guess we have Islam's founder to thank for the moon landing, eh? ;)