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Tema: FTL

  1. #1
    Iskusan NaraYan (avatar)
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    Podrazumevano FTL [Faster Then Light]

    Oxi je napisao:

    Citat Original postavio Oximoron
    Morash uzeti u obzir da je u odnosu na velichinu galaxije i svemira to c i dalje relativno mala brzina ako stvarno ocemo negde da stignemo za manje od 50 godina...Svetlosnom brzinom bi nam do Sunca trebalo oko 8 minuta,do prve zvezde 100(!) godina,dalje i da ne
    prichamo.
    Moje lichno mishljenje je da bez nekog vrsta hipersvemirskog "skoka" nema nishta od medjuzvezdanog putovanja,galaxija je previshe velika(chak se i retki sf pisci dodiru naseljavanja drugih galaxija-Asimov u zavrsetku RCZ-a samo pominje mogucnost neke civilizacije koja bi dosla iz druge galaxije,Klark se toga,koliko ja znam,nije ni dodirnuo,isto vazi i za Hajnlajna itd...).Nazalost,mi nismo ni blizu teorije o tome kako bi se do izvelo.Ovim tempom najblize hipersvemirskom "skoku" bismo mogli da se priblizimo eventualnom skoku u hipersvemir i izlasku iz njega svakih 10-tak minuta,gde bi putovanje bilo ubrzano,ali ni priblizno dovoljno(posto bismo samo mali period mogli da provedemo u hipersvemiru,putujuci brzinom c+,a ostatak vremena u obichnom svemiru skupljajuci energiju za sledeci ulazak u hipersvemir).Chak i ova tehnologija ima male shanse da se ostvari u skorije vreme.I,sve to,ako uzmemo da hipersvemir postoji,i da je moguc prelazak iz obichnog u njega,i nazad,sto,avaj,josh nije dokazano,niti se nauchnici previshe trude...
    E sad,u hipersvemirskom putovanju moglo bi da dodje do velikog broja problema.Prvo,i najprostije,usled greshke u prorachunu brod bi mogao da zavrshi u sred neke zvezde,crne rupe,planete itd...Zatim,mi zaista pojma nemamo kakav bi bio hipersvemir...ne znamo sta bismo mogli da ocekujemo.Ako bi se,usled neke greske brod zaglavio u hipersvemiru bilo bi zaebano...
    Sve ovo je,naravno,nazalost,samo teorija
    I dao mi ideju za topic.

    FTL transport i komunikacija ce biti neophodne stavke u nekoj buducnosti za odrzavanje
    sistema planeta [neshto kao mreza svetova ako je bude]. Kako ce to izgledati tj shta mislite kako ce to izgledati, moguce li je?

    Teorijski je ispravno, naravno, daleko smo od tog trenutka, ali ja lichno mislim da je to vrlo verovatno.
    Poslednji put ažurirao/la NaraYan : 06.05.2007. u 19:25
    etan, metan, butan, nepal.



  2. #2
    Iskusan NaraYan (avatar)
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    Podrazumevano Re: FTL

    Za neupucene:


    FTL u stvari znachi - Faster Then Light. (dok NAFAL znachi Nearly as fast as light]
    To je koncept po kome informacija ili materijalna tela mogu biti prenoshena superluminalnom brzinom kroz prostorvreme. Iako posebna relativnost ne dozvoljava ovakav koncept ubrzavanja preko brzine svetlosti, po opshtoj relativnosti je to moguce. Jedna od mogucnosti bi bio nadaleko poznati WARP ili neki Ajnshtajn - Rozenov most poznatiji u narodu kao Wormhole ili neko kvantno probijanje u Hipersvemir ili....
    etan, metan, butan, nepal.

  3. #3
    Iskusan NaraYan (avatar)
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    Podrazumevano Re: FTL

    Nekako mi se najvishe svidja [skoro] trenutni transport.
    Kakav god bio, mislim da je stvarno neophodan za postojanje odredjene mreze svetova ili federacije
    nazovite to kako god.
    Zato mi se i ne svidja neshto ideja Ekumena u kome se putuje NAFAL-om.
    Ne Ekumena vec transporta, da se razumemo.

    I dalje mislim da NAFAL ne valja.
    Nekako mi je nesvrhovit na vecim udaljenostima, mada bi bio super za intersolarna putovanja.
    etan, metan, butan, nepal.

  4. #4
    Neproveren član MasterYoda (avatar)
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    Podrazumevano Re: FTL

    NAFAL može biti samo sredstvo za otvaranje kapija svemira a nikako trajno rješenje. Početak međuzvjezdanih putovanja u bližu okolinu i ništa više. Na nivou galaksije, NAFAL ništa ne znači. Već na tom nivou, FTL od 10000c je spor, pa i 100000c je spor ako stvarno treba biti gospodar galaksije, jer bi jedna kružna tura s kraja na kraj trajala kao prije 500 godina put do Amerike i nazad. Prava mjera za galaksiju je 10 miliona c.
    Kad krenemo van galaksije, sve sporije od trenutnog putovanja je presporo. Znači, treba nam način da se dvije tačke u svemiru (onakvom kakvim ga shvata naše primitivno razumijevanje) barem na trenutak dovedu u direktnu vezu. Trebaju nam neke kapije kao one u Hiperionovom svemiru - prođeš kroz "kapiju" i nađeš se na drugom mjestu i to odmah.

  5. #5
    Veoma poznat Džek svih zanata (avatar)
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    Podrazumevano Re: FTL

    Naravno da je tako i nikako drugacije...
    Inace, ako se dobro secam, rimsko carstvo je izmedju ostalog i propalo zbog sporosti kretanja legija...iako su imali razvijenu mrezu puteva...

    Jeste da je poredjenje banalno, ali ne pada mi nista bolje na pamet.

    Ali ipak treba neko i da ode i postavi skalameriju.....a taj put, sa skalamerijom, bi bogme potrajao...cak toliko, da bi na zemlji ili gde vec zaboravili da su nekog i poslali...

  6. #6
    Iskusan NaraYan (avatar)
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    Podrazumevano Re: FTL

    Eeee
    To bi vec bio problem.
    Ali, ko zna, kad AI bude rodjena, sigurno ce razmishljati na drugachiji nachin, pa se iz te simbioze mozda i rodi neko divno reshenje
    etan, metan, butan, nepal.

  7. #7
    Iskusan NaraYan (avatar)
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    Podrazumevano Re: FTL

    Ili ce zvezde dolaziti nama ako mi ne mozemo njima...
    etan, metan, butan, nepal.

  8. #8
    Neproveren član MasterYoda (avatar)
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    Podrazumevano Re: FTL

    Ili ljudi (a i niko drugi u svemiru) nikada neće ni ostvariti takva putovanja već krenuti na planete blizance Zemlje u paralelnim univerzumima.

  9. #9
    Iskusan NaraYan (avatar)
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    Podrazumevano Re: FTL

    To je vrlo znimljiva ideja, ali kako kad tamo takodje zive paralelni ljudi
    etan, metan, butan, nepal.

  10. #10
    Neproveren član MasterYoda (avatar)
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    Podrazumevano Re: FTL

    Možda žive a možda ne žive. Razvoj ljudske vrste zavisio je od veoma mnogo parametara pa vjerovatno u barem polovini paralelnih univerzuma na njihovim Zemljama ne živi niko.

  11. #11
    Iskusan NaraYan (avatar)
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    Podrazumevano Re: FTL

    Hmm....
    Logichno, nema shta...

    Samo, stvarno bi bilo super doziveti neshto kao c+ putovanje slichno onome na Konzulovom brodu
    koji su Proterani doradili.
    etan, metan, butan, nepal.

  12. #12
    Neproveren član MasterYoda (avatar)
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    Podrazumevano Re: FTL

    Naravno. I ja bih volio malo prošvrljati galaksijom u takvom brodu. Ne moraš ništa znati o navigaciji i drugim tričarijama - tu je AI broda (tj. brod) da se stara o tome. I o održavanju i masi drugih stvari. Samo kažeš "vozi me tu i tu" i uživaš.

  13. #13
    Iskusan NaraYan (avatar)
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    Podrazumevano Re: FTL

    Sednesh i ne mislish
    etan, metan, butan, nepal.

  14. #14
    Veoma poznat Džek svih zanata (avatar)
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    Podrazumevano Re: FTL

    A ima li na brodu bazen, birtija i kupleraj?


  15. #15
    Neproveren član MasterYoda (avatar)
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    Podrazumevano Re: FTL

    Na guvernerovom brodu bio je fantastičan bazen: Velika vodena kugla koja slobodno lebdi u AG polju. Imao je i dobro opremljen šank a za one pripadnice starog zanata možeš se valjda i sam postarati.

  16. #16
    Veoma poznat Džek svih zanata (avatar)
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    Podrazumevano Re: FTL

    Necu.
    Fino je napisano..."sedi i vozi".

    Ja bi da seednem, a one neka voze....

  17. #17
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    Podrazumevano Re: FTL

    Citat Original postavio NaraYan
    Za neupucene:


    FTL u stvari znachi - Faster Then Light. (dok NAFAL znachi Nearly as fast as light]
    To je koncept po kome informacija ili materijalna tela mogu biti prenoshena superluminalnom brzinom kroz prostorvreme. Iako posebna relativnost ne dozvoljava ovakav koncept ubrzavanja preko brzine svetlosti, po opshtoj relativnosti je to moguce. Jedna od mogucnosti bi bio nadaleko poznati WARP ili neki Ajnshtajn - Rozenov most poznatiji u narodu kao Wormhole ili neko kvantno probijanje u Hipersvemir ili....

    А шта ћемо ако откријемо хиперсвемир...

    И откријемо да је максимална брзина кретања у њему много мања од брзине светлости?

  18. #18
    Neproveren član Oximoron (avatar)
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    Podrazumevano Re: FTL

    Citat Original postavio Kuki2006
    А шта ћемо ако откријемо хиперсвемир...

    И откријемо да је максимална брзина кретања у њему много мања од брзине светлости?
    To je ideja iz priche koju sam odavno prochitao...e pa,onda moramo da drugachije razmishljamo

  19. #19
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    Podrazumevano Re: FTL

    Citat Original postavio Oximoron
    To je ideja iz priche koju sam odavno prochitao...e pa,onda moramo da drugachije razmishljamo

    Или нам остају само NAFAL бродови. Који, и поред очигледних ограничења, ипак нису потпуно неупотребљиви. Бар не за путовања у једном смеру. Замишљам да би колонизација Галаксије (или бар оближњег свемира) путем NAFAL бродова личила на полинежанско насељавање Пацифика: у скоковима, од планете до планете, уз ретка повратна путовања и слабу међусобну комуникацију.

  20. #20
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    Podrazumevano Re: FTL

    Development of the backstory
    Warp drive has been a feature of Star Trek since it started. The first pilot episode of Star Trek: The Original Series, "The Cage", calls it "time warp" drive, and notes that the "time barrier" had been broken, allowing a group of stranded interstellar travellers to get back to Earth much quicker than they had been previously able to.
    The episode "Metamorphosis", from the original series, establishes a backstory for the invention of warp drive, stating that it was invented by Zefram Cochrane of Alpha Centauri. Cochrane is repeatedly referred to afterwards, but the exact details of the first warp trials were not shown until the second Star Trek: The Next Generation movie, Star Trek: First Contact. The movie depicts Cochrane as inventing warp drive on Earth in 2063 (two years after the date speculated by the first edition of the Star Trek Chronology). He used the immense power given off in a matter-antimatter reaction to give energy, which he could use to move a ship into a subspace warp bubble that could then move the ship at faster than the speed of light. This directly led to the first contact with the Vulcans.
    The later prequel series Star Trek: Enterprise firmly establishes that many other civilizations had warp drive before humans, notably the Vulcans, who had more advanced warp drive technology than humans even in the 22nd century. Enterprise, set in 2151 onwards, shows the voyages of the first Earth ship to be capable at going at warp factor 5 which under the old warp table formula was taken as one hundred twenty-five times the speed of light. Using that formula the velocity was the warp factor cubed times the speed of light or 5³*186,000/sec or 5³c, which is 23,250,000 miles per second. This velocity would allow a Federation Starship traveling from Earth at a constant warp 5 to reach Proxima Centauri, Earth's closest stellar body at 4.25 light years (ly) (4.25 X 6 trillion miles) distance (Alpha Centauri is 4.36ly away) in approximately 12.41 days. By the time of Captain Kirk's era in mid 23rd century, Warp factor 8 was within the capabilities of Starships (which was not exceded often due to the strain placed on the engines). Warp 8 was 8³c (512c) or 95,232,000 miles/sec. This would allow travel from Earth to Proxima Centauri in only 3.029 days, approximately the same amount of time it took Apollo 11 to travel from the Earth to its Moon in July 1969.

    The Next Generation era
    Plots involving the Enterprise going far too fast were a frequent feature in the original series, and for The Next Generation, it was decided that these would no longer be featured. A new warp scale was drawn up, with warp 10 set as an unattainable maximum. This is described in some technical manuals as Eugene's Limit as an homage to creator/producer Gene Roddenberry.
    The warp factors above warp 10 in the TOS, such as the one above, were slower than warp 10 on the new scale. According to The Star Trek Encyclopedia, warp 6 (new scale) is equal to 392c (392 times the speed of light, c) and about warp 7.3 on the old scale, whereas warp 9.2 new, to about 1649c and warp 11.8 on the old scale. Under this new definition warp 9.2 translates to 306,714,000 miles/sec. Travel to Proxima Centuri from Earth would only take 22.58 hours.
    The scale reaches an asymptote at warp 10 which represents infinite speed in accordance with the speed limit imposed by the producers. The Star Trek: Voyager episode "Threshold" agreed with this, in that the characters said attaining the velocity of warp 10 was impossible (called Eugene's Limit, another homage to Roddenberry) — but then they achieved it anyway, with the side effect that they hyper-evolved (reversibly) into anthropomorphicnewts. In this episode, Tom Paris describes that, while travelling at warp 10, he is concurrently in every part of the universe. At this speed, the Shuttlecraft Cochrane's sensors are able to process enormous amounts of telemetry such that the data storage of the shuttle is completely filled.
    The limit of 10 did not entirely stop warp inflation. By the mid-24th century, the Enterprise-D could travel at warp 9.8 at extreme risk, while normal maximum operating speed was warp 9.6 and maximum rated cruise was warp 9.2. The Intrepid-class starship Voyager could manage warp 9.975. The old and new formulas are explained in much greater detail below in the section "Warp Velocities".
    The alternate future depicted in the Next Generation episode "All Good Things..." shows Federation vessels capable of going warp 13 when Admiral Riker, commanding the Future Enterprise-D, uses this extra turn of speed to rescue the crew of the USS Pasteur. However, this episode was produced before the Enterprise-D was destroyed in Star Trek: Generations, so the two universes may diverge further than previously expected, and warp 13 may not be possible in the "real" Star Trek universe. It is unclear whether the warp 13 achieved in the possible future shown in "All Good Things..." represents a new recalibration of the warp curve or some form of transwarp, though as this future was a creation of Q it might not occur in the "real" Star Trek timeline.

    Transwarp
    The term transwarp has been used a number of times, referring to an advanced form of warp drive most commonly used by the Borg, but also the subject of a Starfleet development project in Star Trek III: The Search for Spock.
    Episodes of TNG and Voyager seem to indicate that transwarp is best described as a wormhole-style conduit through subspace: this suggests a subsuming into subspace, rather than warping normal space via subspace.
    However, in the Voyager episode "Distant Origin", a species known as the Voth used a transwarp technology didn't appear to be similar to Borg transwarp, but rather an enhanced warp technology.

    Borg Conduits
    The Borg (in the The Next Generation two-part episode "Descent" and in the Voyager finale Endgame) have discovered the existence of transwarp conduits—regions in subspace that facilitate transwarp travel at up to 20 times faster than conventional warp drives. These episodes established that the Borg set up networks of these conduits between important areas in the galaxy. Borg transwarp conduits are activated by an encoded tachyon pulse. When a Borg vessel enters a transwarp conduit, it is subject to extreme gravimetric shear. To compensate, the Borg project a structural integrity field ahead of the vessel. Artificial conduits are linked together with transwarp hubs. Six hubs were known to exist, but in "'Endgame" one was destroyed, along with the Unicomplex due to the neurolyticpathogen with which Admiral Janeway infected herself.

    Quantum Slipstream
    See Slipstream (science fiction)
    Quantum Slipstream Technology is presumed to be the standard interstellar propulsion method used by Species 116 (of which Arturis was a member) prior to their assimilation by the Borg. In the Voyager episode "Hope and Fear", Seven of Nine remarks that the technology involved is not dissimilar to Borg transwarp technology.

    Warp velocities
    Warp travel velocity in Star Trek is generally described in "warp factor" units, which - according to the Star Trek Technical Manuals - correspond to the strength of the warp field. Achieving warp factor 1 is equivalent to breaking the light-speed barrier, while the actual speed of higher factors is determined according to an ambiguous "warp formula". Several episodes of the original series placed the Enterprise in peril by having it travel at high warp factors; in "That Which Survives", this factor was as high as 14.1. However, the actual speed of any given warp factor is rarely explicitly stated on screen, and travel times for specific interstellar distances are not consistent through the various series.
    According to the Star Trek episode writer's guide for The Original Series, warp factors are supposedly converted to multiples of light speed with the cubic functions(w) = w3c. Accordingly, "warp 1" is equivalent to the speed of light, "warp 2" is eight times the speed of light, "warp 3" is 27 times the speed of light, and so on. However, this conflicts with the on-screen application of the technology, as it would make the Enterprise far too slow for the voyages depicted in the television series. These speeds do not even correlate with details presented in some of the episodes. For example, in "That Which Survives" (1969), the Enterprise travels at warp 8.4 for 11.33 hours and traverses 990.7 light years (as indicated in Spock's dialog), which makes the speed more than 600,000 times the speed of light. The Enterprise has also easily traveled to and from the edge of the Milky Way galaxy ("Is There in Truth No Beauty" and "By Any Other Name" (1968)), a journey which should take years at "warp 8" if the actual speed is merely a cube of the warp factor.

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    Podrazumevano Re: FTL

    Behind the scenes explanation
    Star Trek science consultant and writer André Bormanis, has revealed that in the Star Trek universe in a starship warp engine, high-energy plasma, created by a matter-antimatter reaction, is pumped through a series of warp coils cast from an artificial material called verterium cortenide. Verterium cortenide provides a bridge between electromagnetic and gravitational forces. By design, it has the property that when a high-energy plasma circulates through appropriately fashioned verterium cortenide castings, a "warp field" is generated. Electromagnetic interactions between waves of superhot plasma and the verterium cortenide coils change the geometry of space surrounding the engine nacelles. In the process, a multilayered wave of warped space is born, and the starship cruises off to its next destination at velocities equivalent to hundreds of times the speed of light. Relative to "normal" space, within the warp field, the starship does not exceed the local speed of light, and therefore does not violate the principal tenet of special relativity.

    In the Books
    Some years after Star Trek: The Original Series (TOS), Pocket Books came out with a series of books based upon the Enterprise's encounters during both its first and second five year mission. In "The Wounded Sky" written by Diane Duane, the crew picks up a Hamalki engineer, which invents a new form of the Transwarp Drive. Even though such books are not considered canon, the theories proposed in the book lend to the idea of Warp and Transwarp, and further explain the properties of subspace. According to the book, Warp Drive does indeed create a bubble around the ship, however, it is explained that the ship is surrounded by a bubble of subspace- another universe where the speed of light is much faster than in ours. This lends to the theory that one cannot attain the speed of light, but it can be circumvented via alternate universes. The book further explains that the alternate universe is attuned with our own, such that planetary bodies are in exactly the same place, which makes navigation much simpler. The Transwarp Device invented by the Hamalki uses a different approach to the same idea. The Transwarp Drive in this case creates a field around the ship which allows it to enter De Sitter space- a space in which there is infinite energy, zero mass (with exceptions) and no absolute laws of physics or time. This essentially allows the Enterprise to enter De Sitter space and travel millions of times faster than light. In the book, the Enterprise manages to reach the Lesser Magellanic Cloud, another star system far outside the Milky Way Galaxy.


    Ovo je mali deo o FTL pogonu iz ST informatora ili kako mi ST fanovi volimo da zovemo warp drive

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    Podrazumevano Re: FTL

    Is a nonfictional warp drive possible?
    As many Star Trek fans know, many of the futuristic technologies featured in the series have actually been created (such as the hypospray) or are currently being researched (e.g., the VISOR). In 1996, NASA established the Breakthrough Propulsion Physics Program, which sponsored some speculative work on warp drives. This program was discontinued in 2002.

    While thought experiments on the wilder shores of theoretical physics continue, no scheme that may allow "warp speed" travel has yet been devised that has been accepted by mainstream science. Some physicists have proposed a model of FTL travel, formulated in the context of Lorentzian manifolds, which are used in general relativity to construct spacetime models. However, contrary to a common misunderstanding, these models are in no sense solutions to the Einstein field equation, and they give absolutely no hint of how to actually make a warp bubble. These models do however show that while it is indeed impossible to go faster than the speed of light, in principle it might be possible to circumvent the problem by suitably "warping" spacetime itself. The best known such, known as the Alcubierre drive, has the amusing feature that its terminology is in accord with Trek jargon: "warp factors" measure the warping of space (or rather spacetime), not actual speed.


    This is simply the Einstein Field Equations. One should note that Gμν is the Einstein Curvature tensor, which describes the curvature in Space. While the constant G without indices is Newton's Gravitational Constant.
    If spacetime is warped properly, then technically the object(s) are not moving faster than light, even though they are moving at speeds that exceed the speed of light

  23. #23
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    Alcubierre drive
    The Alcubierre metric, also known as the Alcubierre drive or Warp Drive, is a speculative mathematical model of a spacetime exhibiting features reminiscent of the fictional "warp drive" from Star Trek, which can travel "Faster-than-light" (although not in a local sense - see below).

    In 1994, the Mexican physicist Miguel Alcubierre proposed in the Journal of Classical and Quantum Gravity a method of stretching space in a wave which would in theory cause the fabric of space ahead of a spacecraft to contract and the space behind it to expand. The ship would ride this wave inside a region known as a warp bubble of flat space. Since the ship is not moving within this bubble, but carried along as the region itself moves, conventional relativistic effects such as time dilation do not apply in the way they would in the case of a ship moving at high velocity through flat spacetime. Also, this method of travel does not actually involve moving faster than light in a local sense, since a light beam within the bubble would still always move faster than the ship; it is only "faster than light" in the sense that, thanks to the contraction of the space in front of it, the ship could reach its destination faster than a light beam restricted to travelling outside the warp bubble. Thus, the Alcubierre drive does not contradict the conventional claim that relativity forbids a slower-than-light object to accelerate to faster-than-light speeds. However, there are no known methods to create such a warp bubble in a region which does not already contain one, or to leave the bubble once inside it, so the Alcubierre drive remains a theoretical concept at this time.

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    Quantum Slipstream was a starship drive used in two episodes of the science fiction television series Star Trek: Voyager. An extension of warp drive, the slipstream is a narrowly-focused, directed warp field that is initiated by manipulating the fabric of the space-time continuum at the quantum level using the starship's navigational deflector array. It works by focusing a quantum field through a deflector dish to generate massive changes in local space curvature; this creates a subspace tunnel, which is projected ahead of the vessel. Once a ship has entered this tunnel, the forces inside propel it at incredible speed. In order to maintain the slipstream, a ship has to constantly modify the quantum field with its deflector dish; however, the calculations involved are too complicated, and the time available too short for current Starfleet technology. When this technology was discovered by the crew of the lost and stranded USS Voyager, it was hoped this could be used to allow the starship to travel at even greater speeds: the first test of this drive allowed the ship to travel 20,000 light years, almost two-sevenths of the total journey to return to Earth, in minutes.
    However, in the episode Timeless, the technology proved to be dangerously unstable, resulting in the loss of all hands of the Voyager in an alternate timeline. With the shipboard computer unable to map the phase variance in the slipstream fast enough to calculate deflector corrections, Harry Kim offered to take the Delta Flyer ahead to map the slipstream and send the data in advance to Voyager. A miscalculation caused Voyager to fall violently out of slipstream, resulting in the starship's deadly crash-landing onto the surface of an ice planet on the outskirts of the Alpha Quadrant. Fifteen years later, after the remains of Voyager are finally discovered, Harry Kim, who survived the trip home onboard the Delta Flyer, sends calculations back in time, by using a Borg temporal transceiver to collapse the slipstream field before the accident occurred in the primary timeline.
    Seven of Nine stated that she would continue studying it in hopes of someday reacquiring slipstream travel.

    Limits of Slipstream
    Due to the complex nature of slipstream probability and difficulty in mapping slipstream, only biological entities are capable of successfully navigating it. Exiting slipstream near the edge of a galaxy or in certain regions of space could be dangerous because it is difficult to find a slippoint in these areas. If a slippoint cannot be found, or a slipstream drive is damaged, the ship is stranded and limited to slower than light speed.

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    Eh, lako je to...
    Copy - paste i gotovo...
    etan, metan, butan, nepal.

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