1 light in the end how far? The fastest human spacecraft, flying after 1 light-year long it takes?
When we talk about the universe, usually light years distance units as compared to the universe hundreds of thousands of light years away, seems a light year is not far away, however embarrassing, with our current level of human technology is concerned, one light year is the distance can be said to be elusive.
is the speed of light in a vacuum to 299,792,458 meters per second, at this speed, only a little more than a second period of time can reach the moon from the earth, the so-called one light means light in the vacuum straight forward one whole year distance, down conversion is about 9.46 trillion kilometers, equivalent to about 63,241 times the Earth-sun distance.
What is the idea? A simple calculation you know, if we are driving a car at 200 kilometers per hour speeding around the clock, so we need about 540 million years to finish a light year. Of course, we humans produce spacecraft is much faster than a sports car, and then the current fastest human spacecraft flying finish one light year how long it?
So far, the fastest spacecraft was undoubtedly human Parker sun detectors that on August 12, 2018 launch, in a subsequent flight, which means the sun's gravity continues accelerate, speed up to 200 kilometers per second, which is far more than other human spacecraft.
However, even at this speed, to complete one light fly remains a need for about 1500 years. It should be noted that Parker Solar Probe able to achieve such a high speed, with the sun's powerful gravity, and if it is flying toward the outer solar system, it is impossible to reach this speed.
Among the many current human spacecraft launch, the solar system is expected to fly out of a total of five, namely, Pioneer 10, Pioneer 11, Voyager 1, Voyager 2 and new No vision.
in the spacecraft flies most, it is the fastest Voyager 1, the probe was launched in September 5, 1977, the current distance from Earth of about 22 billion kilometers, its flight speed of about 17 kilometers per second, at this rate, it takes about flying after 1 light-year is 1.76 million years time (not considering the sun's gravitational deceleration effect).
Obviously, the answer is frustrating, if not consider other problems during the flight, just such a long time, we humans simply can not accept. Therefore we can say, for now, one light year is "unattainable distance." So in the future, there is no human could exceed 100 light years away it?
Speaking of this, I believe we will be the first time to think of the famous warp drive, it can be space-time itself near the highly distorted, in the implementation of superluminal flight without violating relativity. Unfortunately, it existed only in theory of black science and technology, at least for the foreseeable future, it is impossible to achieve, so we should take a look relatively realistic technology.
2016 In April 2009, Hawking announced the launch of a space exploration program called "breakthrough photo Star", the plan proposes a laser-powered nano-spacecraft. Put it simply, the spacecraft has a special "light sail", is sent into the space, the "light sail" can be provided by using a laser beam of high-energy laser array on the ground to provide continuous spacecraft power, making it faster and faster, in theory, this nano-spacecraft can be accelerated to 20% the speed of light.
in other words, if the plan is successful, then this spacecraft flew just finished a light year It takes five years. The only drawback is the size of the design of this spacecraft only an ordinary postage stamp, can only be used for interplanetary exploration, and want to achieve a larger interplanetary flight, we can only count on a controlled nuclear fusion.
is a human dream of controlled nuclear fusion energy, correlation calculation according, to fusion-powered large universe spacecraft, its theoretical speed of up to about 15% the speed of light, and if the ship can continue to collect nuclear fusion in the fusion of raw materials in space flight, its speed will be greatly improved. It is conceivable that if the future of the human race really achieve controlled nuclear fusion, it will no longer light year is "unattainable distance."
Well, today we have to stop here, we welcome Follow us , we see you next time.
(This article Some pictures from the network, if infringement please contact the author deleted)