Get flash to fully experience Pearltrees
The Kardashev scale is a method of measuring a civilization's level of technological advancement, based on the amount of energy a civilization is able to utilize. The scale has three designated categories called Type I , II , and III . A Type I civilization uses all available resources impinging on its home planet, Type II harnesses all the energy of its star, and Type III of its galaxy. The scale is only hypothetical and in terms of an actual civilization, highly speculative; however, it puts energy consumption of an entire civilization in a cosmic perspective.
A fusion rocket is a theoretical design for a rocket driven by fusion power which could provide efficient and long-term acceleration in space without the need to carry a large fuel supply. The design relies on the development of fusion power technology beyond current capabilities, and the construction of rockets much larger and more complex than any current spacecraft . A smaller and lighter fusion reactor might be possible in the future when more sophisticated methods have been devised to control magnetic confinement and prevent plasma instabilities. For space flight, the main advantage of fusion would be the very high specific impulse , the main disadvantage the (likely) large mass of the reactor. However, a fusion rocket may produce less radiation than a fission rocket, reducing the mass needed for shielding.
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide "Naturalistic science fiction" ( NSF ) is a term created by the Re-imagined Battlestar Galactica co-creator Ronald D. Moore to describe that show's aesthetic. NSF is meant to be a realistic take on the SF genre, with its roots in drama rather than adventure tales. It eschews science-fiction staples such as one-dimensional characterizations, clear-cut conceptions of good and evil, so-called " technobabble " (technical-sounding terms that have mostly been made up), and " deus ex machina " approaches (in which a seemingly intractable problem in the plot is solved using a previously-unknown technical capability). In the case of episodic drama like the re-imagined Battlestar Galactica , there is also more of an effort at continuity - the events in one episode have visible effects in subsequent episodes, unlike other science-fiction shows in which episodes are more stand-alone.
Hard science fiction is a category of science fiction characterized by an emphasis on scientific or technical detail, or on scientific accuracy, or on both. [ 1 ] [ 2 ] The term was first used in print in 1957 by P. Schuyler Miller in a review of John W. Campbell, Jr. 's Islands of Space in Astounding Science Fiction . [ 3 ] [ 4 ] [ 5 ] The complementary term soft science fiction (formed by analogy to "hard science fiction" [ 6 ] ) first appeared in the late 1970s.