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Voyager, a lone traveler floating in deep space, is the crystallization of human courage and ingenuity. Looking at this detector made by humans, I fell into deep thought.
This space probe, which cost the United States $350 million and has a speed of more than 17 kilometers per second, is known as the fastest man-made space probe in human history. The built-in 11 scientific instruments allow it to peek into the mysteries of the universe from multiple angles, including optical, magnetic, infrared and cosmic rays. It left Earth 46 years ago and began its long journey. However, despite its speed, its existence reveals a harsh truth: even the speed of light cannot get humans out of the solar system.
The solar system is not as simple as we think. Its boundaries are not just a few planets and asteroid belts, in fact, its range is much larger than we know. With the exception of a few major planets, the boundaries of the solar system stretch tens of billions of kilometers, and this is still part of the solar system. Further afield, there is a gathering area of interstellar objects known as the Oort Cloud. This region is made up of large and small meteorite fragments and asteroids and is the ring of the solar system. The scope of the Oort Cloud extends far beyond the Kuiper Belt and is so large that existing human technology is simply impossible to reach. Even probes like Voyager can't bring us much more information.
The problem that bothers humans even more is that the Sun's activity is not limited to the regions of the planets. The solar wind has far more influence than we think. The solar wind carries away a large amount of particles and energy, forming a huge barrier. Even at the speed of light, the spacecraft cannot withstand the powerful impact of the solar wind. And if the spacecraft is larger, then it will face more particle collisions, and whether the spacecraft can withstand the high temperature is still a huge question.
When the spacecraft crosses the heliopause and comes to outer space, it still needs to cross the Oort Cloud. The Oort Cloud is almost out of the Sun's gravitational range, and the gravity of the Solar System has little effect on it. The objects in the Oort Cloud are mainly composed of material produced when the Sun and other brother stars move. However, studying the Oort cloud is still a difficult task. It's so far away that even a probe like Voyager can't give us enough information. The vastness of the Oort Cloud makes human dreams seem so small.
Human technological development is still at the edge of the solar system. The speed of light may be a theoretical limit, but even at this speed, humans struggle to leave the confines of the solar system. In real life, energy constraints and speed limits make it impossible for humans to cross this boundary. However, the future is unknown. Perhaps one day in the future, humanity will discover new ways to break through this boundary and achieve interstellar travel. And Voyager will become a revelation for us to explore the universe, and also a beautiful fantasy for our future.
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