One of the paradoxes that surrounds the possible interstellar journeys in the future is the enormous distance in which we find ourselves. As astronomical unit more popular to represent these astronomical distances is used the “light year”, that is equivalent to the distance light, whose speed is 299,792,458 m/s, covered in a year, i.e. approximately equivalent to a little less than ten billion kilometers. Our closest star, Proxima Centauri, is 4’2 light years away.
The problems begin with the theory of relativity, developed by Einstein, which sets the speed of light as the speed limit to which any object can travel, eliminating all its mass to achieve it. This is the case of the photons that are emitted by the stars, and that constitute the solar radiation or light that we receive, for example, of our Astro King, using about 8 minutes to reach the Earth.
Another of the drawbacks of traveling at speeds close to that of light, assuming that it was rolling, would come again associated with the relativity of Einstein and would be the distortion space. In the interstellar system, time would slow, so that while the ship would spend a short period of time, it could take tens of years to go outside.
Looking for Opportunities
The solution chosen by the science fiction, called hyper-space, was created by John W. Campbell in 1934, and consists in using another space as a shortcut. With a certain basis in science and in the possibilities to contemplate new theories about the universe, we have introduced the so-called “holes of worms”
Since the idea of the interstellar voyages have been sought alternatives according to the technology of each epoch, in the years 1950 the use of the nuclear bombs emerged, whose power had recently been demonstrated in Hiroshima and Nagasaki, with constructive purposes. The explosion of these bombs would generate enough impulse to get high speeds. In the 60 the idea of using interstellar protons to produce the nuclear reaction arose.
In the 80 is thought in candles of large dimensions attached to the ships, which would use the time or speed associated with the light, similar to a pressure, to propel themselves. The problem appeared with the choice of the source of radiation, which should be powerful enough to provide high speeds. As an alternative to the light of the stars by be low when it is far from the latter, are raised the use of lasers of high power.
Currently all space vehicles are based on the propulsion, technique that provides the push for expulsion rapid of combustion gases. However this has a downside, the enormous amount of propellant also necessary that this must be highly reactive to generate a great momentum. This is a drawback that limits the achievement of high speeds for long periods of time.