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Topic: Interplanetary travel

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	Interplanetary travel - Wikipedia, the free encyclopedia
		By definition, interplanetary travel is travel between bodies in a given star system.
		In the case of planetary transfers this means adjusting the spacecraft, originally in an orbit almost identical to Earth's, such that the apogee is on the far side of the Sun near the orbit of the other planet.
		While manned interplanetary travel (with the arguable exception of the Apollo program) has not yet been achieved, a trip to Mars is probably feasible, even with chemical rocket propulsion, and could probably be achieved within a decade (at most two) if the funds were made available.
	en.wikipedia.org /wiki/Interplanetary_travel (1272 words)

	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 (1848 words)

	Interplanetary travel (Site not responding. Last check: 2007-10-08)
		By definition, interplanetary travel is travel between bodies in agiven star system.
		In the case of planetary transfers this means adjusting the spacecraft, originally in an orbit almostidentical to Earth's, such that the apogee is on the far side of the sun near the orbitof the other planet.
		While manned interplanetary travel has not yet been achieved, a trip to Mars is quite feasible with present technologies and could probably be achieved within a decade (at most two)if the funds were made available.
	www.therfcc.org /interplanetary-travel-45488.html (978 words)

	Interplanetary travel: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-08)
		Travel is the transport of people on a trip or journey....
		In orbital mechanics and aerospace engineering, a gravitational slingshot is the use of the motion of a planet to alter the path and speed of an interplanetary...
		The interplanetary superhighway has come to denote a set of transfer orbits between various planets and moons in the solar system....
	www.absoluteastronomy.com /encyclopedia/i/in/interplanetary_travel.htm (2889 words)

	Interplanetary travel (Site not responding. Last check: 2007-10-08)
		This is because any spacecraft starting on a planet is also in orbit around the sun, and a brief glance at the planetary speeds and distances demonstrates that the power of a rocket pales in comparison to the relative speeds of the planets.
		The transfers on this system are slower than Hohmann transfers, but use even less energy, and are particularily useful for sending spacecraft between the inner planets.
		While manned interplanetary travel has not yet been achieved, a trip to Mars is quite feasible with present technologies and could probably be achieved within a decade (at most two) if the funds were made available.
	www.bopedia.com /en/wikipedia/i/in/interplanetary_travel.html (956 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		In the year 2021, a series of ring-shaped hyperspace gateways were constructed across the solar system, allowing for easy interplanetary travel.
		One well known irony is that Bradbury, despite writing about spaceships and interplanetary travel and having lived in Los Angeles for most of his life, has never driven a car.
		Hedging the creators' bets as to which of the superpowers would first master interplanetary travel, the flag he carries is a combination of US and Soviet emblems.
	www.worldhistory.com /wiki/I/Interplanetary-travel.htm (855 words)

	Interplanetary travel (Site not responding. Last check: 2007-10-08)
		By definition interplanetary travel is travel between bodies in a given star
		In order to make interplanetary travel a reduction in the total amount of needed to do so is required.
		While manned interplanetary travel (with the arguable of the Apollo program) has not yet achieved a trip to Mars is probably feasible even with chemical propulsion and could probably be achieved within decade (at most two) if the funds made available.
	www.freeglossary.com /Interplanetary_travel (1117 words)

	Critique space travel system (interplanetary)? - GameDev.Net Discussion Forums
		Travel is in a straight line for most modules, but a few can accept "planck-space anchors" that allow them to turn and evade.
		What I have in mind is the ability to either travel emphasizing safety, speed or stealth; to warn you when supplies are at X percent; and an optional sensor scan that eats up energy but has a chance to warn you about encounteres before they happen.
		If you travel by quick map (which shows the whole system), you can opt to fly along spacelanes, which should be safer, and select objects to intercept or dock with if you can see them.
	www.gamedev.net /community/forums/topic.asp?topic_id=254114 (8490 words)

	2002 News Releases - Interplanetary Superhighway Makes Space Travel Simpler
		Called the Interplanetary Superhighway, the system was conceived by Martin Lo, whose software was used to help design the flight path for NASA's Genesis mission, which is currently using this "freeway in space" on its mission to collect solar wind particles for return to Earth.
		Since Lagrange points are landmarks for the Interplanetary Superhighway, we might be able to shunt spacecraft to and from such platforms." A team at NASA's Johnson Space Center, Houston, working with the NASA Exploration Team, proposes to someday use the Interplanetary Superhighway for future human space missions.
		The work on the Interplanetary Superhighway for space mission design was nominated for a Discover Innovation Award by Discover magazine editors and an outside panel of experts.
	www.jpl.nasa.gov /releases/2002/release_2002_147.html (682 words)

	Mimosa 27, pages 20-21. "Interplanetary Travel -- At Last?" by Fred Smith
		Back then, things like spaceships traveling to Mars and manned landings on the moon were found usually only in magazines with strange, garish covers.
		Ever since the neolithic times of the Gernsback era, science fiction has been closely identified with space travel, and now that space travel is a reality, stories dealing with it are hardly sf at all.
		Okay, so two of the stalwart topics of sf, space travel and atomic power, are now with us, but not in the way that was predicted exactly and somehow unsatisfying as a result.
	www.jophan.org /mimosa/m27/smith.htm (1307 words)

	Definition of index.php?search=Travel&limit=20&offset=20
		between interstellar travel and [[interplanetary travel]], mainly in the distances involved.
		As the book was updated yearly, travellers would not arrive somewhere only to find their...
		It was cumbersome and expensive for a travel agency to have multiple terminals, each one conne...
	www.wordiq.com /knowledge/index.php?search=Travel&limit=20&offset=20 (707 words)

	INTERPLANETARY TRAVEL AND PERMANENT INJURY TO NORMAL HEART
		It appears logical to assume that man will not survive extended space travel without the benefits of unremitting endurance exercise to ward off complications related to disuse atrophy in a microgravity environment.
		Just as with potential marath-oners it seems reasonable to reject astronauts for interplanetary missions with high cholesterol levels and hypertension—even when both are corrected— since these conditions may predispose to both coronary and peripheral vascular constriction enhancing the likelihood of cardiac ischemia even in the absence of coronary atherosclerosis [2].
		Extrapolating from limited data derived from orbital flights, man's cardiac tolerance to interplanetary travel appears quite poor without the protective devices of genetic engineering [32].
	www.femsinspace.com /injurytoheart.htm (1843 words)

	Interplanetary Travel (Site not responding. Last check: 2007-10-08)
		Not only that, but it'll play a vital part in interplanetary travel, although Retro seems keen to stress you won't actually have direct flying control.
		Everyone here at Carolina Traveler Interplanetary Headquarters is standing all around meâ¦ softly clapping.
		We encourage the pursuit of interplanetary travel, murder mystery scenarios, karmic conversion, stunt professionals, inductive reasoning, golems, commercial...
	www.wikiverse.org /interplanetary-travel (1129 words)

	Interplanetary Space
		Interplanetary space, or the space between the planets, is not empty but is filled with the solar wind, and the Interplanetary Magnetic Field (IMF), as well as cosmic rays, and dust.
		Another name for interplanetary space is the Heliosphere, because the space between the planets is the total space which is under the influence of the sun.
		A bow shock helps the solar wind to go around obstacles in interplanetary space such as comets and planetary magnetospheres.
	www.windows.ucar.edu /tour/link=/glossary/interplanetary_space.html (159 words)

	EBTX - The Rocket Equation-Tsiolkovsky and Interplanetary Space Travel
		Scientists who "poo-poo" space travel just want to steer your attention away from the fact that it is entirely feasible and thus away from the dreaded "U" word which scares the bejeesus out of them, i.e.
		They are no good for travel to other stars but might be good locally.
		This gizmo consists of tethering the rocket to a larger mass and firing rockets in both the rocket and mass so as to rotate them around a common center of gravity.
	ebtx.com /mars/rocketeq.htm (1615 words)

	"Space Travel is Utter Bilge"
		Until a few decades ago, interplanetary travel was the stuff of dreams and fantasy.
		In the end, it would be a handful of these individuals, existing on the fringe of contemporary science, largely ignored and sometimes derided by the “experts” of their day, who carried forward the torch of interplanetary travel and manned space flight.
		Born in Transylvania Hungary, in 1894, Oberth produced a treatise on rockets and interplanetary travel as his doctoral dissertation at the University of Heidelberg.
	pr.caltech.edu /periodicals/CaltechNews/articles/v36/bilge.html (3353 words)

	Basics of Space Flight Section I. The Environment of Space
		hen travelling among the planets, it's a good idea to minimize the propellant mass needed by your spacecraft and its launch vehicle.
		Prior to the adoption of the gravity assist technique, it was believed that travel to the outer solar system would only be possible by developing extremely powerful launch vehicles using nuclear reactors to create tremendous thrust, and basically flying larger and larger Hohmann transfers.
		All of the above discussion of interplanetary trajectories is based on the use of today's system of chemical rockets, in which a launch vehicle provides nearly all of the spacecraft's propulsive energy.
	www2.jpl.nasa.gov /basics/bsf4-1.html (1848 words)

	Interplanetary Travel: An Intro (with Equations)
		Interplanetary travel involves distances of hundreds and thousands of millions of kilometers between moving objects.
		As an example, Earth is moving around its sun at an average velocity of nearly 30 km/sec, Mars is moving at 24 km/sec (a difference of about 20,000 kilometers per hour, or almost 13,000 miles per hour), and the distance between them is millions of kilometers.
		The difference between earth orbit and interplanetary orbit can be as low as 2 meters per second.
	www.geocities.com /Area51/Chamber/2838/space.html (2719 words)

	Interplanetary Communications
		Considering the vast amount of interplanetary travel which has been and is going on, even though unseen and unrecognized by the material earthman, we can therefore safely present an obvious fact: that Dr. Ernest L. Norman and Ruth E. Norman are interplanetary travelers.
		The reality of interplanetary travel has been brought to the forefront in the present and has been acknowledged by thousands of people who have had interdimensional contacts of the first, second, and third kind.
		An Interplanetary Confederation will be seen as the existence of highly advanced humankind who have attained to a higher level of awareness of their spiritual nature.
	www.unarius.org /pathway/path4.html (2052 words)

	Traveling the Outer Planets
		During the last forty years, Gene Roddenberry, pushed beyond the boundaries of interplanetary travel as an event and placed it as a mere routine journey to the stars.
		If a spacecraft were traveling at 100 km per hour, it would close to sixty years to reach Mars, but rockets travel faster than 100 km per hour.
		The Mir space station attempted growing crops, but for interplanetary travel, it would be a necessity to grow crops to supply people and animals with food and with oxygen to breathe.
	www.spacehike.com /travel.html (698 words)

	The Future of Human Spaceflight (Site not responding. Last check: 2007-10-08)
		But when it comes to interplanetary travel, Chang-Diaz and others say conventional chemical propulsion and solar electric systems won't cut it.
		But for longer journeys, they would have to carry so much fuel that the amount of mass allotted to basic equipment for an interplanetary outpost would be limited.
		Then reactors would be launched in segments to prevent the possibility of a radioactive release during a launch accident.
	www.floridatoday.com /columbia/futurespace/spaceflight1ONSHIPS.htm (823 words)

	Mars Quest Introduction
		Interplanetary travel has become very popular and you see a great future in this business.
		You want to provide travelers with the best information you can and plan to become a leader in your field.
		You must ensure that travelers know enough about Mars to plan well, to know the best spots to visit, and at what time of year to visit them.
	btc.montana.edu /ceres/html/MarsQuest/Quemarsintro.html (473 words)

	ScienceDaily: Interplanetary Superhighway Makes Space Travel Simpler
		Called the Interplanetary Superhighway, the system was calculated by Martin Lo, who used his theory to design the flight path for NASA's Genesis mission, which is currently using this "freeway in space" on its mission to collect solar wind particles for return to Earth.
		Lo has turned the theory of the Interplanetary Superhighway into a tool for mission design called "LTool," using models developed at Purdue University, West Lafayette, Ind. The new LTool designed the flight path for the Genesis mission, the first space mission to use the theory of the Interplanetary Superhighway.
		Healthy Travel Africa is a user-friendly guide to minimising health risks for travellers to all parts of Africa, including Egypt.
	www.sciencedaily.com /releases/2002/07/020718075904.htm (2073 words)

	Please title this page. (shemb.html) (Site not responding. Last check: 2007-10-08)
		Star Haven will develop an interplanetary pass port program and shall contact interplanetary ambassadors to make agreements with planets and interplanetary organizations throughout the universe, to provide interplanetary immigration forms and safe space travel permits.
		The immigration agreements and space travel permits may be nondisclosed publicly between the planet and the applicant, until Earth governments, and interplanetary governments decide to make such agreements public knowledge on Earth.
		Once an application has been received it will remain active, and kept in a computer viewable by interplanetary organizations, and if any interplanetary organization should decide to approve of the application, then the applicant will be contacted, so that the applicant need not reapply, though the applicant may update information that has changed.
	www.rhfweb.com /shemb.html (335 words)

	Wired 9.01: Zip Drive
		These plans are based on the speeds achieved by conventional chemical engines, which burn their propellants in one short, powerful burst that sends a ship coasting toward its target.
		A travel time of only 115 days puts Mars within comparatively easy reach, but it will take a new sort of engine.
		Over time, constant acceleration means high speeds that lessen the crew's exposure to space-borne radiation and other hazards of interplanetary travel.
	www.wired.com /wired/archive/9.01/plasma.html (1076 words)

	Interplanetary Transport
		Rocket propulsion, which relies on Newton's law of action and reaction, is the fastest means of interplanetary travel today.
		Small amounts of antimatter would be useful for initiating and maintaining fission or fusion reactions in hybrid rockets, where matter-antimatter annihilation would be used to cause atomic nuclei to undergo nuclear fission or to form heavier nuclei through nuclear fusion and release tremendous amounts of energy.
		While slower, orbital transfer concepts for interplanetary travel may be more cost-effective for moving large amounts of cargo.
	members.nova.org /~sol/station/interpla.htm (1377 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		The biggest problem with interplanetary travel is that the distances are enormous.
		A constant acceleration of 1g soon gets you into the realm of relativistic speeds, where the calculations are more complex, but the bottom line is that you could travel to Sirius, in about 24 years, or to the Andromeda galaxy in about 5 million years.
		So you could travel to Andromeda in one lifetime, maybe even there and back if medicine makes a few advances, but on Earth 5 or 10 million years would have passed.
	campus.lakeforest.edu /~bell/astro/travel.html (719 words)

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