how do aliens travel so long distance to reach the earth?
609869
Aliens travel through wormholes, meaning they don't fly long distances to get to earth. \n\n"Intra-universe wormholes connect one location of a universe to another location of the same universe(in the same present time). A wormhole should be able to connect distant locations in the universe by bending spacetime, allowing travel between them that is faster than it would take light to make the journey through normal space. See the image above. Inter-universe wormholes connect one universe with another [1], [2]. This gives rise to the speculation that such wormholes could be used to travel from one parallel universe to another. A wormhole which connects (usually closed) universes is often called a Schwarzschild wormhole. Another application of a wormhole might be time travel. In that case it is a shortcut from one point in space and time to another. In string theory a wormhole has been envisioned to connect two D-branes, where the mouths are attached to the branes and are connected by a flux tube [3]. Finally, wormholes are believed to be a part of spacetime foam [4]. There are two main types of wormholes: Lorentzian wormholes and Euclidean wormholes. Lorentzian wormholes are mainly studied in semiclassical gravity and Euclidean wormholes are studied in particle physics. Traversable wormholes are a special kind of Lorentzian wormholes which would allow a human to travel from one side of the wormhole to the other. Sergey Krasnikov tossed the term spacetime shortcut as a more general term for (traversable) wormholes and propulsion systems like the Alcubierre drive and the Krasnikov tube to indicate hyperfast interstellar travel."
253340
maybe they are aliens from uranus
506185
Firstly they travel with the speed which is faster than light. Secondly there is always a short-cut available.\n For example: We think that a straight line is the shortest distance between two points which is actually incorrect in reality. If the plane is u-shaped (and not straight) then the shortest diatnce will get reduced.\n Hence they might have also got short-cuts to reach our earth.
1167217
no one has been abducted by aliens\n\n\nthose who claim that they have been are very, very bored
1158056
As to finding aliens,  it's anyone's guess.\nAs to that kind of travel, the next generation may see it.  Boeing, UK, and Russia are presently researching "Anti-Gravity".  It is reported that Boeing has a center, not broadly publicised.\nUse your imagination on the ability to attract or repel an object, in space, by repelling the gravity of earth and attracting the gravity of another planet.\nThis has been "demonstrated" in Sci Fi, but so was our present communication devices.....in Dick Tracy comics...from the '30s on.\nRussia claims to have progressed further than others but will not offer proof.  UK has accomplished a minute amount of progress.
54730
Not clear what you mean?  How does it stay up in space? It does that because it is going very fast, which would take it away from earth, but gravity is pulling it back, causing it to curve, and go around the earth, just like a string on a yo-yo if you just whip it around your head. \n\nIf you mean, what does it do, there are different kinds, but most of them get power from solar panels, and have radio receivers and transmitters to communicate back to earth.
1112253
Photons are produced by the sun in it´s core, because it is only there that fusion takes place. But the plasma of the sun is dense \nand the photon is continuously absorbed and re-emitted during its rise to the surface. Hence the photon will take about a million year to make the trip.\n\nAnd 8 minutes 20 seconds more to travel from the surface to the earth.
829228
That is how the aliens track us
458927
what makes anyone think that aliens would want to invade  our world. maybe they want to share with us how to live in an advanced and maybe peaceful world. not that we would know anything about that, and we are so ignorant to them helping us that we would probably nuke them. and no great leader would be able to defeat an alien invasion, they have more pwerful weapons than us. if they are advanced enough to have ships to travel to other worlds then they can defeat any army in this world.
1179
They don't exist.\n\nThey exist and have a level of technology similar or less advanced then we have.\n\nThey exist and have a superior level of technology.\n\nIf they have our level or a lesser level of technology it is not likely that we would know about them. With our current ability to communicate long distances it would take thousands of years to get a signal from the nearest galaxy, or to travel those distances. \n\n\nIf the have a superior level of technology we would probably not be able to detect them. \n\nSo, it is possible given the size and scope of the universe, however, it would be damn hard to prove.
1014608
Probably,\n\nI don't know if they are walking talking aliens, but I wouldn't be surprised to find out there are other forms of life that didn't start in our solar system.\n\nAfter all, there are billions and billions of solar systems. Are we so self-absorbed /self-involved that we think this could only happen to us.
1122565
In order to communicate with aliens!!!
421019
i'm not saying there is no aliens and i'm still not saying they are aliens but if there are aliens with techs more advance than that of ours, then they would be coming here for visits time to time. If they are at the same techs with us then we would be able to pick up their signals long time if they was there. so my guess is it's a mystery or maybe they are still in their stone age but if that was the case then we would be picking up there signals from since long time.
568260
Get in touch with me, buong, I am, and I will be leaving in 4 days. My name here is Glalien, I come from Pleedeeze, it takes 8 hours to arrive here from our planet, via time warping. Our ships are made of nothing you have on this planet. Our propulsion is of magnetics. You will not believe me if I tell you why we are here. Look me up.
550076
better question is...If UFO's could make it here to earth, Why would they? we would be like the kids that ride the short yellow bus compared to them.
748593
There is no evidence that alien species from other worlds or other galaxies have ever visited Earth. The examples given have all been debunked by numerous scientists. We'd like to believe there is life out there, but we haven't heard from anyone yet. Because the distances are vast -- measured in hundreds of thousands of light years -- it is more likely that we would have radio or television transmission, which travels at the speed of light, than a visit in person. Maybe they're listening to our TV broadcasts and don't think we're intelligent enough to contact.
178668
I think they do exist somewhere but not on earth.\n\nAlso Nasa is wasting so much money to search for them.\n\nthere are only 2 options: the aliens are smarter, or the aliens are dumber.\n\nif they are smarter they will find us first, and if they are even more stupid then humans we dont need to find them.