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Most dropped it and soon pulled up unused tracks. The system reportedly monitors for uploads of known copyrighted files over peer-to-peer (P2P) file sharing software, and tracks those files based on IP address. Once you get into space -- where the distances are enormous, celestial objects sometimes get in the way, and there's a lot of electromagnetic radiation all over the place to mess with the signal -- delays and interruptions of the data flow are inevitable. The vast distances, motion of planets and space radiation pose significant challenges, creating lag times and signal degradation that complicate communication across space. But getting laser communication to work in space is no cakewalk. But even so, some space scientists envision someday launching a giant starship that essentially would be a moving, self-contained miniature version of Earth, capable of sustaining successive generations of astronauts who would venture across interstellar space in an effort to reach other habitable planets and possibly even make contact with extraterrestrial civilizations. The scientists and futurists working on Project Icarus -- a speculative attempt to design a starship capable of reaching the nearest neighboring star system, about 2.35 trillion miles (3.78 trillion kilometers) away -- spent a lot of time thinking about how such a ship might stay in contact with the Earth as it journeyed across the enormity of interstellar space.

The communications craft would then use the sun as a lens to magnify the signals it gets from the distant starship, and then would transmit them back to Earth though some other system, such as a network of satellites with laser links. Sometimes, a base might be turned away from the Earth, and every so often -- approximately once every 780 Earth days -- Mars and the Earth have the sun directly between them. But what if scientists and engineers equipped every craft or object that was launched into space -- from space stations, orbital telescopes, probes in orbit around Mars or other planets, and even robotic rovers that explored alien landscapes -- so that they all could communicate with one another and serve as nodes of a sprawling interplanetary network? That's enough space to hold dozens of HD movies. Even if you throw most of those little pieces into the trash, the ones that remain might well give you enough information to reconstruct the message on the paper. That's easy enough if you have an iPhone or a laptop that you can carry around the house, but if your copy of iTunes is installed on a stationary desktop computer, you'll have to walk back to that machine to switch from Blake Shelton to Miranda Lambert.

If you're looking for a metaphor on Earth, imagine how your laptop computer, tablet, smartphone, game console, webcam and home entertainment center could all link into your wireless Internet router and share content with one another. The Internet protocol that we use on Earth relies upon breaking up everything we transmit -- whether we're talking about text, voice or streaming video -- into little pieces of data, which is then reassembled at the other end so someone else can look at or listen to it. Imagine it this way: Take a message typed on a piece of paper, and then print a thousand copies of it, and run them all through a shredder and then mix up the tiny pieces that result. According to Einstein's relativity theories, extremely massive objects' gravitational forces can actually deflect light that's passing near them and concentrate it, the way a hand-held magnifying glass does. But if those dissenters turn out to be right, we'd still have to actually find some proof that particles can move faster than light speed, and so far we haven't. But back on Earth, those monitoring the mission would still face the challenge of trying to pick up signals from the starship and filter out the ambient electromagnetic noise of space -- a task made even more difficult by the Earth's atmosphere, which would weaken the signals.

The slick, suave, animated character was anthropomorphized as the face of R.J. There was one highly-publicized 2011 experiment, in which researchers at the CERN particle accelerator in Europe supposedly clocked particles called neutrinos moving an extremely tiny bit faster than Einstein's speed limit. That's why visionaries long have been intrigued with the idea of transmitting messages via beams of subatomic particle that would travel faster than light. But guess again. For that scheme to work, we seemingly would have to blow a great big hole in Einstein's theory of special relativity, which prohibits anything from moving faster than light speed. As with most any volunteer work, there is training involved. But there might be a smaller, less costly and more incremental way of putting together such a network. So far, though, there hasn't been any move to build such a system, perhaps because of the cost of putting multiple satellites in orbit around distant heavenly bodies is likely to be enormous. Forty years later, two scientists, Stevan Davidovich and Joel Whittington, sketched out an elaborate system, in which three satellites would be put in polar orbit around the sun, and others in either geosynchronous or polar orbits around the various planets.

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