Does Halley's Comet ever leave our solar system?
I have no idea but i think Brian is probably incorrect. Good Luck Comet Halley is a fine example of a short-period comet, taking about 76 years to make one orbit around the Sun. At its closest point (perihelion), the comet is only 88 million kilometers from the Sun (about 60% of the Earth's distance from our star.) At its most distant point (aphelion), Halley is 5.2 billion kilometers from the Sun and thus beyond the orbit of Neptune. I found this online , it says how far but it doesn't say what is "out" of our solar system..
Will we ever leave our solar system? By what means might we do that?
Voyager 1 and Voyager 2 have already left our solar system. Of course, it will take them thousands of years to be somewhat close to any other star. If what you mean is whether people themselves, not just their machines, can leave the solar system, then there are three possibilities. One is to develop advanced propulsion systems that can travel at a significant fraction of the speed of light. The most likely to achieve that feat would be a ramjet that would use the hydrogen in space as fuel. The second, and most spectacular, would be to find a way to power an Alcubierre engine, which by expanding space-time behind it and decreasing it in front could go beyond the speed of light (the spaceship itself would be at rest with respect to the space around it, the way a surfer does not move with respect to the wave he rides, though that wave moves very fast). But who knows if we can ever figure that out. The third, and surest, though the slowest way, would be to propel several O’Neill style space colonies in the direction of several stars. They would use the resources of interstellar space to support large colonies (in the millions of people) for tens of thousands of years in the search for new solar systems to colonize.
Will we ever leave our solar system and if so when?
No, I believe Humans will never leave our solar system because physical laws prevent it.Lets take a look at reported UFO observations. According to NASA, and many others there is a natural explanation for most UFO observations, but a small percentage cannot be explained immediately. I do believe that life exists in many places in the universe, but I do exclude spaceships from another solar system visiting earth because the distances are so huge and travel faster than the speed of light, are prevented by gravity and the physical laws as we know them. With our current technology, it would take about 40,000 years to travel to Alpha Centauri, our nearest extrasolar star system, only a little more than 4 light years away, while the majority of the solar systems and galaxies in the universe lies hundreds, even thousands, yes even billions of light years away. If we imagine that we, in the far future, will have the technology to reach 25% of the speed of light, this speed approximately means we could fly so fast that we could circle around the earth 2,5 times in one second. However, this speed is nevertheless utopia because we would not be able to bring as much energy as needed to reach that speed, and then we need similar amount of energy to slow down again.With our current technology, we can travel to the Moon, we can land and then travel back to earth again, we can also travel to Mars and land, but we cannot return to earth, because Mars gravity prevents it we cannot bring as much energy as necessary for the return trip. So, we need to invent another form of energy there doesn't take much space.
In what year do you think humanity will leave the Solar System?
It took us ~1 million years to leave Africa, and what separated Africa from the rest of the world was a little bit of water. The only reason we could leave when we did was because a freak of nature caused the Red Sea to be temporarily dry enough to cross. It took us ~60,000 years to invent technology that would enable that crossing a wet Red Sea. And, it might be that if we had never migrated out of Africa, we might have needed a lot longer to created the technology to be able to cross a wet Red SeaWhat separates us from the universe is vacuum. Cold vacuum that is many many more times uninhabitable than water. As of now, part of our research is dedicated to crossing/managing that vaccum barrier. Also, a lot of our efforts are being spent in finding habitable planets, and making uninhabitable planets into habitable. Since a lot of habitable planets are very very far away, we are also researching on how to get there fasterAlso, what binds us to Earth is gravity. Early humans didn't have to climb out a gravity well. A lot of research is going into overcoming gravity. We do have a solution for this, albeit a very expensive one.I'm pretty sure early humans didn't give a damn about what they found on the other side, or how they will get there. They just went. Many of them died before they reached the other side. We are too scared to leave the Earth. IMO, we should invest in creating lifeboats. Create self-sustaining ecosystem that can be hosted on a multi-generational starship, and let's just go! Allonz-y!. If some of us die, we die. IMO, if we wait for technological advancements to solve all the problems before we get out of here, we will all die here.
Will we humans ever travel out of our solar system??is it possible r just for movies?
It is definitely possible. However, we do not have the technology needed to reach the kind of speeds necessary to allow for travel to other solar systems, stars, etc. Here's something to consider, though. Einsteins Laws of Relativity, while not allowing travel at full light speed, do allow travel almost up to (and just short of) light speed. As you go closer to light speed, the traveler's clock would "slow down" as compared to an observer's clock on a "stationary" object. If you got close enough to light speed, you could travel across the galaxy (100,000 light years wide) in what might seem minutes or hours to you, and about 100,000 years to me. Great, great stuff. To learn more about this concept, google "twins paradox". Or go to http://media.nasaexplores.com/lessons/02-060/9-12_2.pdf and scroll down to page three. This will explain it more fully to you.
Haven't we left our solar system?
Despite NASA's over exuberant publicity when Voyager 2 crossed the heliopause at 85 AU or so, the honest answer is no. The Oort cloud a large disk full of icy stuff left over from the formation of the solar system, is gravitationally bounded to the Sun. In other words, it is part of the solar system. Well, the Oort cloud extents at least up to 50,000 AU. Voyager 2, moving with a speed of 3 AU per year, will need another 20,000 years to cross that boundary. Would NASA still be around by that time?
Will we ever leave our galaxy?
Ever? That’s a long time. But I don’t think that we will leave, and that opinion is based on my conclusion that there is no reason to leave. The nearest other galaxy, the Andromeda galaxy, is over 2.5 million light years away. That means it would take more than 2.5 million years to reach it.Of course, maybe we will discover how to use wormholes to tunnel to distant places. Then we could go (just as Jodie Foster tunneled to the center of the Milky Way in Carl Sagan’s novel and movie “Contact”). But the theory of wormholes currently states that the wormholes are too unstable to allow enough time for such passage. Here is part of what I say about wormhole travel in my new book:——-excerpt from Now: The Physics of Time——-[A problem with wormhole travel in Kip Thorne’s 1988 paper] is that the wormhole is described as so unstable, so short-lived, that a person would not have sufficient time to travel through before the wormhole disappeared. There is a loophole: if physicists and engineers can figure out how to impart a “negative-energy density” to a large region of space, then the wormhole might endure. No way to do that is known, but nothing in physics absolutely rules it out, we think. With this requirement, however, the entire demonstration of the feasibility of stable wormholes has collapsed, independently of the other objections. It has become speculative, requiring new physics. The authors are clear about this. They state, “Whether wormholes can be created and maintained entails deep, ill-understood issues.” The existence of such wormholes is reminiscent of the possibility of tachyons: just because nothing in our current physics theory rules them out doesn’t mean that they do exist.——-end of excerpt from Now: The Physics of Time——-I can’t however rule out some concept in the future for tunneling. And if we travel near the speed of light, we can get there in 2.5 million years but only experience one year of our own time. But if we want to get back, over 5 million years will have passed on Earth.
Will man ever be able to leave planet earth?
Biologic life support systems only need to be close enough as we can store excess oxygen or CO2 and release them when needed, also oxygen can be harvested from the silicon dioxide of the regolith on moons and asteroids, from the frozen water ammonia ice, from the CO2 of dry ice, all available on asteroids and comets. We can't launch the equipment and workers needed to build a large habitat but we can launch robots and perhaps a small habitat where a few people can be sheltered from the radiation and live in centrifugal gravity close enough to the robots to guide them in real time through telepresence. We won't be able to manufacture much at first but we could make wires, wires can make cables, cables can be knitted like yarn into the general shape of a large habitat, the holes in the knitted structure can be filled with regolith and either sintered or exothermic thermite welded with iron oxide and aluminum powders. Once the general structure is complete, the workers can work safely in the relative protection of the interior with gravity, nitrogen can be from the water ammonia ice commonly found on asteroids, comets and even some parts of the Moon, oxygen can be from the water, from the CO2 of dry ice ( again from comets ) or even from silicon dioxide. Power can be from the Sun or from liquid fluoride thorium reactors. We don't really need exotic technologies, we just need a reason to invest in the project. Changes in our mating practices would only be necessary for a stable population during an interstellar voyage but even then, a habitat could stop at an interstellar comet and construct a new habitat for a burgeoning population. There would be no reason to force changes in mating except for the use of frozen embryos and sperm on occasion to diversify the gene pool. We can avoid the small town effect by having the habitats in fleets thereby becoming communities within a larger city or nation like cluster of habitats.
Does it disappoint you that humanity will never leave the solar system?
No, because I am convinced that we will leave the solar system eventually. That’s how humanity rolls. We learn, we grow and we adapt. Our curiosity is never satisfied.You have to put things into perspective. It is easy to overestimate our current challenges and have a depressed outlook on the future, for instance based on the fact that we haven’t been to the Moon for a long time. But just last week, SpaceX reused their Falcon 9 rocket only one year after its first launch and again successfully landed it on a floating drone barge. This is huge.Look at where we were 100 years ago. We had simple planes with wooden propellors. Helicopters and transport planes were nonexistant. Planes made a slow transition from being made of wood to metal (alloys). We had no satellites, (long-range) rockets, pressurised cabins, radio navigation, radar, jet engines, nuclear power or any kind of computer.This is the world as of today:We already sent a satellite to pretty much every celestial body in our solar system. Twelve people have walked on the moon. 226 (!) people went to the International Space Station. In fact, let’s talk about the ISS for a bit. We have a space station of 420,000kg and of similar size as a football field floating around at an altitude of 400km. That’s the kind of stuff you would only read about in sci-fi novels.How can someone doubt that we will ever leave the solar system, given these achievements?Sure, we will stumble. We will fail. We will continue to wage war on each other and have imbalances here on Earth.But our potential and ambition has no limits. We will put a man (or a woman) on Mars in 50 years. We will have an astronaut training camp on the Moon (northpole) in the same time span. We will send tourists to the Moon and Mars and start mining asteroids.At the same time, people on Earth will learn how to extend our lifespans and suddenly long missions in space won’t matter, especially when we discover cryogenic statis.Then one day, 100 or 200 years from now, the first colony ship to Alpha Centauri will depart, either in pursue of scientific knowledge or to find a world far away from an unpopular POTSS (President of the Solar System).