War against the Aliens.........Country's threat level should be at (Glow in the dark Green)
Googooly
Is there any video of this UFO thingy??
DOOMBOT
quote:
Originally posted by Googooly
Is there any video of this UFO thingy??
Probably not and if there were, it would be blurry like all of the others.
Googooly
quote:
Originally posted by DOOMBOT
Probably not and if there were, it would be blurry like all of the others.
damn, I would pay good money to see some aliens or ufos.
UmmiE
quote:
Originally posted by Googooly
damn, I would pay good money to see some aliens or ufos.
Not the video of Stephenville incident but has lots of pics and videos for you're entertainment:-
Googooly
quote:
Originally posted by UmmiE
Not the video of Stephenville incident but has lots of pics and videos for you're entertainment:-
wowww!!! Incredible! If they are fake, they sure as hell look so real to me.
thanks alot man!
Krypton
Where's the video?
Meat187
People are idiots.
There's no such thing as aliens visiting us in their flying saucers. Neither are they watching us from some far place in the universe. Anybody with the slightest knowledge about physics and information theory will know that both is impossible.
Ang ' ela_ie
I saw one like this when I was a kid, only it had bright lights on the bottom.
Sure, I could have hallucinated it... but really? Im pretty normal. I never hallucinated anything else in my childhood (at least not that I know of).
Meat187
quote:
Originally posted by Ang ' ela_ie
I saw one like this when I was a kid, only it had bright lights on the bottom.
Sure, I could have hallucinated it... but really? Im pretty normal. I never hallucinated anything else in my childhood (at least not that I know of).
Human perception is a very subjective thing.
Krypton
quote:
Originally posted by Meat187
People are idiots.
There's no such thing as aliens visiting us in their flying saucers. Neither are they watching us from some far place in the universe. Anybody with the slightest knowledge about physics and information theory will know that both is impossible.
...:D
Thought this was interesting..
quote:
INTERSTELLAR TRAVEL
Interstellar travel designs fall into two categories. The first, which we will call slow interstellar travel, takes a great deal of time, sometimes longer than a human lifespan. The second, which we will call fast interstellar travel assumes that the difficulties above can be conquered.
Slow interstellar travel
Slow interstellar travel designs such as Project Longshot generally use near-future spacecraft propulsion technologies. As a result, voyages are extremely long, starting from about one hundred years and reaching to thousands of years. Crewed voyages might be one-way trips to set up colonies. The propulsion systems required for such slow travel are less speculative than those for fast interstellar travel, but the duration of such a journey would present a huge obstacle in itself. The following are the major proposed solutions to that obstacle:
Generation ships
A generation ship is a type of interstellar ark in which the travellers live normally (not in suspended animation) and the crew who arrive at the destination are descendants of those who started the journey.
Generation ships are not currently feasible, both because of the enormous scale of such a ship and because such a sealed, self-sustaining habitat would be difficult to construct. Artificial closed ecosystems, including Biosphere 2, have been built in an attempt to work out the engineering difficulties in such a system, with mixed results.
Generation ships would also have to solve major biological and social problems.[1] Estimates of the minimum viable population vary - 180 is about the lowest, but such a small population would be vulnerable to genetic drift, which might reduce the gene pool below a safe level. A generation ship in fiction typically takes thousands of years to reach its destination, i.e. longer than most human civilizations have lasted. Hence there is a risk that the culture which arrives at the destination may be incapable of doing what is needed - in the worst case it may have fallen into barbarism. Also they may forget that they are on a generation ship. Stephen Baxter's story "Mayflower II" (in the collection Resplendent) explores both of these risks as does Robert A. Heinlein's two-part 1941 novel Orphans of the Sky.
Suspended animation
Scientists and writers have postulated various techniques for suspended animation. These include human hibernation and cryonic preservation. While neither is currently practical, they offer the possibility of sleeper ships in which the passengers lie inert for the long years of the voyage.
Extended human lifespan
A variant on this possibility is based on the development of substantial human life extension, such as the "Engineered Negligible Senescence" strategy of Dr. Aubrey de Grey. If a ship crew had lifespans of some thousands of years, they could traverse interstellar distances without the need to replace the crew in generations. The psychological effects of such an extended period of travel would potentially still pose a problem.
Frozen embryos
A robotic space mission carrying some number of frozen early stage human embryos is another theoretical possibility. This method of space colonization requires, among other things, the development of a method to replicate conditions in a uterus, the prior detection of a habitable terrestrial planet, and advances in the field of fully autonomous mobile robots. (See embryo space colonization.)
Fast interstellar travel
The possibility of starships that can reach the stars quickly (or at least, within a human lifespan) is naturally more attractive. This would require some sort of exotic propulsion methods or exotic physics.
Sub-light-speed travel
If a spaceship could average 10 percent of light speed, this would be enough to reach Proxima Centauri in forty years. Several propulsion systems are able to achieve this, but none of them are reasonably cheap.
Since the 1960s it has been technically possible to build spaceships with nuclear pulse propulsion engines, i.e. ships driven by a series of nuclear explosions. This propulsion system contains the prospect of very high specific impulse (space travel's equivalent of fuel economy) and high speed, and therefore of reaching the nearest star in decades rather than centuries; construction and operational costs per unit of Payload (air and space craft) were expected to be similar to those of ships using chemical rockets.[2] Interest in this propulsion method has declined because producing nuclear explosions in space was made illegal by the 1963 Partial Test Ban Treaty. See Nuclear pulse propulsion for details.
Fusion rocket starships, using foreseeable fusion reactors, should be able to reach speeds of approximately 10 percent of that of light. These would "burn" deuterium.
Light sails powered by massive ground-based lasers could potentially reach even greater speeds, because they do not need reaction mass and therefore do not need to accelerate that as well as the Payload (air and space craft). In theory a lightsail driven by a laser or other beam from Earth can be used to decelerate a spacecraft approaching a distant star or planet, by detaching part of the sail and using it to focus the beam on the forward-facing surface of the rest of the sail.[3]
In 1960 Robert W. Bussard proposed the Bussard ramjet, a fusion rocket in which a huge scoop would collect the diffuse hydrogen in interstellar space, "burn" it on the fly using a proton-proton fusion reaction, and expel it out of the back. Though later calculations with more accurate estimates suggest that the thrust generated would be less than the drag caused by any conceivable scoop design, the idea is attractive because, as the fuel would be collected en route, the craft could theoretically accelerate to near the speed of light.
Finally, there is the possibility of the Antimatter rocket. If energy resources and efficient production methods are found to make antimatter in the quantities required, theoretically it would be possible to reach speeds near that of light, where time dilation would shorten perceived trip times for the travelers considerably.
Light speed travel
Interstellar travel via transmission
If physical entities could be transmitted as information and reconstructed at a destination, travel precisely at the speed of light would be possible. Note that, under General Relativity, information cannot travel faster than light. The speed increase when compared to near-light-speed travel would therefore be minimal for outside observers, but for the travelers the journey would become instantaneous.
Encoding, sending and then reconstructing an atom by atom description of (say) a human body is a daunting prospect, but it may be sufficient to send software that in all practical purposes duplicates the neural function of a person. Presumably, the receiver/reconstructor for such transmissions would have to be sent to the destination by more conventional means.
Faster than light travel
Scientists and authors have postulated a number of ways by which it might be possible to surpass the speed of light. Even the most serious-minded of these are extremely speculative.
Warped Spacetime
According to General Relativity, spacetime is curved, according to the Einstein equation:
General relativity may permit the travel of an object faster than light in curved spacetime.[4] One could imagine exploiting the curvature to take a "shortcut" from one point to another. This is one form of the Warp Drive concept.
In physics, the Alcubierre drive is based on an argument that the curvature could take the form of a wave in which a spaceship might be carried in a "bubble". Space would be collapsing at one end of the bubble and expanding at the other end. The motion of the wave would carry a spaceship from one space point to another in less time than light would take through unwarped space. Nevertheless, the spaceship would not be moving faster than light within the bubble. This concept would require the spaceship to incorporate a region of exotic matter, or "negative mass". As a practical means of interstellar transportation, this idea has been criticized; see Alcubierre Drive.
Wormholes
Wormholes are conjectural distortions in space-time that theorists postulate could connect two arbitrary points in the universe, across an Einstein-Rosen Bridge. It is not known whether or not wormholes are possible in practice. Although there are solutions to the Einstein equation of general relativity which allow for wormholes, all of the currently known solutions involve some assumption, for example the existence of negative mass, which may be unphysical.[5] However, Cramer et al. argue that such wormholes might have been created in the early universe, stabilized by cosmic string.[6] The general theory of wormholes is discussed by Visser in the book Lorentzian Wormholes[7]
NASA research
The NASA Breakthrough Propulsion Physics Project identified two breakthroughs which are needed for interstellar travel to be possible [8]:
1. A method of propulsion able to reach the maximum speed which it is possible to attain
2. A new method of on-board energy production which would power those devices.
In other words, any engine short of the best conceivable engine won't work, and that engine cannot be powered by currently known energy sources. Analogies for 'breakthroughs' in technology are steam engines supplanting sailing ships, and jet aircraft replacing propeller aircraft.
Geoffery A. Landis, of NASA's Glenn Research Center, says that a laser-powered interstellar sail ship could possibly be launched within 50 years, utilizing new methods of space travel. "I think that ultimately we're going to do it, it's just a question of when and who," Landis said in an interview. Rockets are too slow to send humans on interstellar missions. Instead, he envisions interstellar craft with gigantic sails, propelled by laser light to about one tenth the speed of light. It would take such a ship about 43 years to reach Alpha Centauri, if it passed through the system. Slowing down to stop at Alpha Centauri could increase the trip to 100 years.
