Conclusion It might be thought that special relativity provides a short negative answer to this question. In actual fact, there are many trivial ways in which things can be going faster than light FTL in a sense, and there may be other more genuine possibilities.
Interstellar probe Slow interstellar missions based on current and near-future propulsion technologies are associated with trip times starting from about one hundred years to thousands of years.
These missions consist of sending a robotic probe to a nearby star for exploration, similar to interplanetary probes such as used in Travel conclusion Voyager program. Researchers at the University of Michigan are developing thrusters that use nanoparticles as propellant. Their technology is called "nanoparticle field extraction thruster", or nanoFET.
These devices act like small particle accelerators shooting conductive nanoparticles out into space. Kaku also notes that a large number of nanoprobes would need to be sent due to the vulnerability of very small probes to be easily deflected by magnetic fields, micrometeorites and other dangers to ensure the chances that at least one nanoprobe will survive the journey and reach the destination.
With onboard solar cells, they could continually accelerate using solar power. One can envision a day when a fleet of millions or even billions of these particles swarm to distant stars at nearly the speed of light and relay signals back to Earth through a vast interstellar communication network.
As a near-term solution, small, laser-propelled interstellar probes, based on current CubeSat technology Travel conclusion proposed in the context of Project Dragonfly. Generation ship A generation ship or world ship is a type of interstellar ark in which the crew that arrives at the destination is descended from those who started the journey.
Generation ships are not currently feasible because of the difficulty of constructing a ship of the enormous required scale and the great biological and sociological problems that life aboard such a ship raises. Sleeper ship Scientists and writers have postulated various techniques for suspended animation.
These include human hibernation and cryonic preservation. Although neither is currently practical, they offer the possibility of sleeper ships in which the passengers lie inert for the long duration of the voyage. Embryo colonization A robotic interstellar mission carrying some number of frozen early stage human embryos is another theoretical possibility.
This method of space colonization requires, among other things, the development of an artificial uterusthe prior detection of a habitable terrestrial planetand advances in the field of fully autonomous mobile robots and educational robots that would replace human parents.
There may be ways to take advantage of these resources for a good part of an interstellar trip, slowly hopping from body to body or setting up waystations along the way. Time dilation Assuming faster-than-light travel is impossible, one might conclude that a human can never make a round-trip farther from Earth than 20 light years if the traveler is active between the ages of 20 and A traveler would never be able to reach more than the very few star systems that exist within the limit of 20 light years from Earth.
This, however, fails to take into account relativistic time dilation. Upon return, there would be a difference between the time elapsed on the astronaut's ship and the time elapsed on Earth.
For example, a spaceship could travel to a star 32 light-years away, initially accelerating at a constant 1. After a short visit, the astronaut could return to Earth the same way. After the full round-trip, the clocks on board the ship show that 40 years have passed, but according to those on Earth, the ship comes back 76 years after launch.
From the viewpoint of the astronaut, onboard clocks seem to be running normally. The star ahead seems to be approaching at a speed of 0.
The universe would appear contracted along the direction of travel to half the size it had when the ship was at rest; the distance between that star and the Sun would seem to be 16 light years as measured by the astronaut.Introduction There are no precise, reliable statistics on the amount of computer crime and the economic loss to victims, partly because many of these crimes are apparently not detected by victims, many of these crimes are never reported to authorities, and partly because the losses are often difficult to .
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