"A great t-shirt gift idea for any fan of science, physics, astoronoy anything to do with the stars. The Drake Equation, is used to estimate the number of communicating civilizations in the universe, or more simply put, the odds of finding intelligent life in the universe. N = the number of civilizations in our galaxy with which communication might be possible (i.e. which are on our current past light cone); and R* = the average rate of star formation in our galaxy fp = the fraction of those stars that have planets ne = the average number of planets that can potentially support life per star that has planets fl = the fraction of planets that could support life that actually develop life at some point fi = the fraction of planets with life that actually go on to develop intelligent life (civilizations) fc = the fraction of civilizations that develop a technology that releases detectable signs of their existence into space L = the length of time for which such civilizations release detectable signals into space"
Tags: space, warp-speed, physics, astronomy, aliens
By the close of the 21st Century, unmanned space probes have verified the existence of complex organic chemistry in the frozen wastes of Europa’s surface ice. Now, in the mid-22nd Century, a manned mission is being sent to Jupiter’s ice-bound satellite for the first time. After it lands, the crew will spend five lonely years penetrating the icy crust and probing the mysteries of a vast, hidden ocean in the ongoing search for extra-terrestrial life.
Tags: space, europa, nasa, cosmos, arthur-c-clarke