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Topic: Interstellar travel

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Interplanetary travel

Interstellar ark

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Twin paradox

Alcubierre drive

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Solar sail

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	Interstellar travel - Wikipedia, the free encyclopedia
		Interstellar space travel is unmanned or manned travel between stars, though the term usually denotes the latter.
		The concept of interstellar travel in starships is a staple in science fiction.
		There is a tremendous difference between interstellar travel and interplanetary travel, mainly due to the much larger distances involved.
	en.wikipedia.org /wiki/Interstellar_travel (1905 words)

	interstellar travel
		It is made problematic at present by the immense distances involved (see interstellar distances), which are orders of magnitude greater than those of interplanetary travel, and by the limited propulsion technologies that are available.
		Already several spacecraft from Earth are heading, slowly, toward the stars (see interstellar probes), although they will be defunct long before they arrive anywhere near the vicinity of any extrasolar planetary systems.
		It gives examples of one-way and rendezvous unmanned interstellar probe vehicles that can return data on the number and nature of the planets around the target system within less than 50 years after launch.
	www.daviddarling.info /encyclopedia/I/istravel.html (523 words)

	UFO Evidence : Interstellar Travel (Site not responding. Last check: 2007-10-22)
		The ETH and the Likelihood of Interstellar Travel
		After all, the assumed unlikeliness of interstellar travel has become the cornerstone of those who resist the ETH as an explanation for UFOs.
		This essay will explain the challenges of interstellar travel, the prospects and limitations of existing propulsion ideas, and the prospects emerging from science that may one day provide the breakthroughs needed to enable practical interstellar voyages.
	www.ufoevidence.org /topics/interstellartravel.htm (1421 words)

	Interstellar Travel
		Travelling along the onramp is always bumpy, but is much much worse and actively dangerous if the ship entered hyperspace with anything other than zero relative velocity; deceleration is not optional.
		Regardless of the ship's normal-space velocity, travel along the onramp is limited absolutely by the speed of light and practically by the pilot's ability to use her sensors to detect impending turbulance.
		Dedicated couriers that travel from onramp to onramp, delivering and receiving messages by laser to avoid having to travel to the local planet, can cut out most or all of the overhead time, but the speed of hyperspace travel is still the upper limit on the speed of information between systems.
	www.idiom.com /~trip/gaming/homebrew/psob2/spaceflight.html (1642 words)

	Interstellar Travel (Site not responding. Last check: 2007-10-22)
		Interstellar spaceships are equipped with warp drives enabling them to travel between the stars.
		Interstellar craft may be privately owned but most operate on behalf of one of the Imperial organisations.
		As far as interstellar travel is concerned, the Imperium is all-powerful and ships not controlled by the Imperium are only permitted to exist because their owners are co-operative and useful.
	www.inisfail.com /archives/bfg-travel.html (2580 words)

	Articles: Cruising the Infinite: Strategies for Human Interstellar Travel, by Paul Lucas
		The fastest object ever launched, the Voyager 2 probe, is traveling at dozens of miles per second, and yet it would not reach even the nearest star, Proxima Centauri, in less than 100,000 years -- twenty times longer than the age of the civilization that built it.
		Once a human presence has been established on an interstellar brown dwarf or rogue planet or lonely comet, the process would be reversed in a nearby system, moving inward from the interstellar way station to the new system's Oort Cloud, then to its Kuiper Belt, to its outer planets, and finally to its inner system.
		Moving at significant fractions of lightspeed, the repeated impacts of the interstellar hydrogen on the immense ramscoop field is thought by some to offset much of the acceleration produced by the fusion engines, greatly reducing the starship's capabilities.
	www.strangehorizons.com /2004/20040621/travel.shtml (3940 words)

	InterStellar Technologies Corporation
		Certainly the central problem of travelling even to a "nearby" star (meaning, for instance, one within a 40 light year distance from the sun) is that of propulsion (in this section only rough orders of magnitude are considered).
		InterStellar travel became a challenge at a deeper intellectual level than any other previous "in the box" assignment, and he started a personal study of all possible basic physics solutions to the challenges of propulsion associated with this goal.
		InterStellar Technologies Corporation is as young as the first five seconds of the Wright Brothers' first flight, the first five minutes of Charles Lindberg's transatlantic leap, and the first five hours of the Apollo 11 mission to the Moon.
	interstellartechcorp.com /companyHistory.html?... (1414 words)

	interstellar travel
		Let's assume that you are traveling to a star 10 light-years away from Earth. Let's also assume that the spaceship of my invention can reach.8c or 80% of the light-speed. According to relativity, a 12.5-year trip, as registered by the Earth-bound clock, would take "only" 7.5 years by the spaceship’s clock.
		In our society, family and social ties are important. So, interstellar travel is for space nomads who are at home wherever they are.
		Of course, travel in a tunnel would restrict faster-than-light travel to a predetermined path of what would be, essentially, a shuttle mission.
	borisvolfson.com /shipformannedtravel.html (959 words)

	The Physics of Interstellar Travel - UFO Evidence (Site not responding. Last check: 2007-10-22)
		This essay shows the beginnings of interstellar travel and its developments as it shadows advancing and emerging science.
		Reasons for the difficulties of interstellar travel are explained as well as possible ways of bypassing them.
		The mission objective of the Voyager Interstellar Mission (VIM) is to extend the NASA exploration of the solar system beyond the neighbourhood of the outer planets to the outer limits of the Sun's sphere of influence, and possibly beyond.
	www.ufoevidence.org /documents/doc1060.htm (3560 words)

	Interstellar Travel
		And a light year is the distance traveled in one year at the speed of light, a distance of almost 6 trillion miles.
		The truth of the matter is that traveling these distances does require a level of technology that man has not achieved, but it has nothing to do with flying in a linear mode near the speed of light.
		Well, the fact is that when you are dealing with space/time and you enjoy the capability of generating an intense gravitational field, the fastest way from Point A to Point B is to distort, or warp, or bend the space/time between Points A and B, bringing Points A and B closer together.
	www.karinya.com /travel1.htm (2149 words)

	UNIVERSITY OF SOUTH DAKOTA
		We need to be able to travel at speeds far greater than those currently attainable, we need to be able to travel through space without the use of a propellant, and we need to find a more bountiful energy supply.
		The ability to travel to nearly any region of our universe (and possibly beyond) with very little travel time is difficult to imagine.
		The problems of travel speed and the limits imposed by the use of a propellant would both be solved by the use of an Alcubierre warp drive or a wormhole.
	www.usd.edu /phys/courses/phys300/gallery/intravel.htm (3181 words)

	Manual:Interstellar travel - VsWiki (Site not responding. Last check: 2007-10-22)
		For the history and theory of interstellar travel, jump drives and wormholes, please refer to scientific literature.
		Interstellar travel is accomplished via jump points to access singularities formed between two previously weakened points in the space-time continuum, joining the two points in interstellar space.
		This 'opens' the wormhole, allowing anything within a certain range of the jump drive to travel into the singularity.
	vegastrike.sourceforge.net /wiki/Manual:Interstellar_travel (435 words)

	Bob Lazar explains interstellar travel and UFO gravitic propulsion
		And a light year is the distance travelled in one year at the speed of light, a distance of almost 6 trillion miles.
		The truth of the matter is that travelling these distances does require a level of technology that man has not achieved, but it has nothing to do with flying in a linear mode near the speed of light.
		This is accomplished by generating an intense gravitational field and using that field to distort space/time, bringing the destination to the source, and allowing you to cross many light years of space in little time and without travelling in a linear mode near the speed of light.
	members.fortunecity.com /groom51/interstellartravel.html (2046 words)

	Interstellar Travel
		Also, in that gravity does play a part in the movement of a craft across vast distances of the universe, but he tends to go astray, when it is proposed gravity is in the form of a wave and is produced on the atomic level within the spacecraft’s reactor.
		His theory concludes, that faster than light space travel is accomplished by closing the distance between two points with amplified gravity waves, which closes the distance between two points.
		Upon directional change activation, repulsion particle flow affecting the craft is decreased in the opposite direction of travel in proportion to the desired speed in the forward direction of the craft.
	www.grantchronicles.com /astro19.htm (4343 words)

	Interstellar Travel
		Starships can now travel very close to the speed of light, making even long journeys seem to last only a few months for the passengers.
		Travelling from one place to another is usually quickest through the wormhole nexus, which means that the only relativistic journeys that have to be undertaken are the ones to and from the nexus, often cutting travel times with several millennia.
		The discovery of several alien wormholes has been an important factor in several regional interstellar expansion efforts, as they allow major jumps outwards without having to wait for the relativistic linedropper-ships to emplace wormholes.
	www.orionsarm.com /topics/interstellar_travel.html (449 words)

	Mkaku.org: Articles and Essays : The Physics of Interstellar Travel (Site not responding. Last check: 2007-10-22)
		When discussing the possibility of interstellar travel, there is something called “the giggle factor.” Some scientists tend to scoff at the idea of interstellar travel because of the enormous distances that separate the stars.
		The critics say that the universe is simply too big for interstellar travel to be practical.
		Most scientists doubt interstellar travel because the light barrier is so difficult to break.
	www.mkaku.org /article_intertravel.htm (2770 words)

	Interstellar Travel (Gravity Control Introduction)
		This means it takes light 4.2 years to travel the distance, in everyday units it is approximately 25 trillion miles (40 trillion km).
		Interstellar travel is a wholly different problem, the distance from the Earth to the nearest star is a few thousand times greater than the distance to Pluto.
		An advanced system could even perform interstellar travel as quickly and comfortably as science fiction writers have imagined for years.
	www.thespacesite.com /space_interstellar_travel.html (1698 words)

	Interstellar Spaceflight Is It Possible
		Although commonly perceived to be empty, interstellar space has a minuscule amount of hydrogen gas - at a density of about one or two atoms per cubic centimeter.
		With this in mind, it may simply be too expensive and technically difficult to travel in interstellar space.
		Despite the fact that I am not sure of the moral goodness of interstellar travel in retrospect to the tower of Babel, I think that such distant travel may be much sooner than 50 years away (25, 10, 5????).
	www.physorg.com /news8817.html (2021 words)

	Interstellar Travel - useful books
		Frank Herbert, interstellar travel requires navigators to 'see' the future with the help of the all important spice.
		Arthur C Clarke there seem to be the possibility of FTL travel, but in sequels travel is definitely limited by light speed.
		There are several books which speculate about the possibilities of interstellar travel, and look at the different ideas that have been proposed to achieve it, for example
	www.chronon.org /books/interstellar_travel.html (415 words)

	The big mystery: Interstellar travel - Mysteries of the Universe - MSNBC.com
		The real question is not whether interstellar travel can be done, but when it will be fast and easy enough to send the first mission.
		Further technological developments can significantly reduce this time, but further scientific breakthroughs are needed before interstellar travel becomes practical.
		It took four decades to go from the first liquid rocket to the first landing on the moon, and three decades to go from the confirmation of radioactive decay to the first nuclear reactor.
	www.msnbc.msn.com /id/3077859 (1126 words)

	The Worlds of David Darling: Bookshop: Interstellar Travel
		A collection of impressive papers which were presented at the American Association for the Advancement of Science symposium of the same name, held in Boston, Massachusetts on February 15, 2002.
		Considered are not only the technical issues, which are formidable, but also the social and "human" issues that will impact (and perhaps be impacted by) mankind's excursions to other star systems.
		The book is also a plea to remember that the urge to explore the unknown is what makes us human and that the future may not be as far away as we think.
	www.daviddarling.info /bookshop/interstellar_travel.html (299 words)

	Mankind's Version of Interstellar Travel
		This mode of travel is one of the two methods of propulsion used by the disc.
		The other mode of travel is the “omicron configuration” and is used for short-range travel near a source of gravity such as a planet or a star.
		When a disc travels near another source of gravity, like Earth, the Gravity A wave, which propagates outward from the disc, is phased shifted into the Gravity B wave, which propagates outward from the Earth, and this creates the lift.
	www.grantchronicles.com /interstellartravelmk.htm (843 words)

	Interstellar Travel
		so i chose interstellar travel, kinda wish i hadnt now, cos im not sure where im going with the whole thing- iv started talking about the problems involved, such as speed, propulsion and energy, but thats as far as i got.
		Regarding "warp drives"; it has been stated by the leading researchers in that field that "any realistic sceem for FTL (Faster Than Light) travel would have to involve negative energy." The laws regarding the existence of negative energy make superluminal travel pretty unlikely.
		By journeying through a wormhole, you could travel between the two regions faster than a beam of light would be able to if it moved through normal space-time.
	www.physicsforums.com /showthread.php?t=447 (1915 words)

	Dummies::Making Interstellar Travel Possible
		Namely, the relativity of time and space allows for the possibility of human interstellar travel.
		We may also want to visit the center of our galaxy, which is hidden from our eyes by interstellar dust but visible to our x-ray, infrared, and radio telescopes.
		However, even if we design a spaceship that can travel at 0.99c, interstellar travel beyond the nearest stars seems impossible for the foreseeable future.
	www.dummies.com /WileyCDA/DummiesArticle/id-3242.html (479 words)

	Life in the Universe > Social Implications > Contact > Interstellar Travel (Site not responding. Last check: 2007-10-22)
		The costs of accelerating a craft to speeds approaching that of the velocity of light become prohibitively expensive and even a speed of one tenth of this is pretty daunting.
		In summary, whilst relatively fast interstellar travel, say at up to one tenth of the velocity of light, is not impossible, it is exceedingly expensive, requiring enormous energy resources.
		It may not be the best way to communicate with a foreign civilisation, and certainly not the fastest one, at least to start with!
	www.lifeinuniverse.org /noflash/Travel-09-06-01.html (407 words)

	Science Fiction Writer Robert J. Sawyer: Y3K: Interstellar Travel
		Alternatively, travel could be done in suspended animation.
		Regardless of how we choose to travel, we will probably never go faster than the speed of light —; the laws of physics seem unlikely to allow that.
		But for most travelers such journeys will be one-way trips; interstellar commerce is unlikely to ever develop.
	www.sfwriter.com /y3kinter.htm (553 words)

	NASA - Warp Drive, When?
		This web site focuses on the propulsion related issues, explaining the challenges of interstellar travel, existing propulsion ideas, and the possibilities emerging from scientific literature that may one day provide the desired breakthroughs.
		To simplify the presentation for the general public, analogies to familiar science fiction are used.
		The requirements for and an explanation of the emerging physics associated with intersellar travel.
	www.lerc.nasa.gov /WWW/PAO/warp.htm (399 words)

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