Why can t humans fly out of the solar system? What does it take to fly out of the solar system?

If humans want to fly out of the solar system, they must abandon the current rockets that generate thrust by rapid combustion of chemicals, fundamentally changing the way humans obtain energy, and the radius of the solar system is 1 light year, and it is too inefficient to expect the thrust generated by chemical combustion.

At present, human rockets can be said to be in the way of "fire" to generate power, the use of specially designed engines, the oxidizer and fuel are injected outward at high speed, and a certain amount of power is generated to send the spacecraft to the earth orbit, but such a propulsion method is too inefficient, first of all, the mass of the rocket is greatly increased, 800 tons of rockets can send more than a dozen tons of equipment to the earth orbit, most of the mass of the rocket is occupied by fuel, although the fuel and accelerant carried by the rocket are hundreds of tons.

However, it can only send the spacecraft to the earth's orbit, accelerate to the first and second cosmic speeds, and burn a lot of fuel every second, both in terms of the carrying capacity of the rocket and the combustion of rocket fuel, the efficiency is relatively low.

The rocket carries less fuel, making it difficult to accelerate the spacecraft to the third cosmic velocity, and the spacecraft carries less fuel, and can only accelerate the spacecraft through the gravitational slingshot effect.

However, it is basically impossible to fly out of the solar system just by breaking through the third cosmic velocity, the first human measurement of the mass of the solar system may not be very accurate, and the radius of the second light year is expected to fly at a speed of kilometers per second, and it takes tens of thousands of years to fly out, neither the human lifespan nor the size of the spacecraft that can be made can support such a long flight. To fly across a star system, a craft must travel at least 10 of the speed of light, and it will take years to fly out.

Human beings are currently unable to fly out of the solar system, that is, the level of human science and technology is far from enough, and the use of energy is still relatively rudimentary, and human beings must master the almost infinite energy generation method of controlled nuclear fusion, and the time to travel across the star system is only after the life span of human beings is greatly improved.

At the current level of human technology, the speed of the fastest aircraft is 17 kilometers per second. The outer outer layers of the solar system are surrounded by Oort clouds, and it will take 17,600 years for humans to fly out of the solar system. Flying out of the solar system, humans need to increase the speed of the vehicle to sub-light speed to be able to fly out of the solar system.

Because the level of science and technology that human beings now have is limited. Flying out of the solar system requires high-speed flying aircraft. Advanced technology is also needed.

Human beings cannot fly out of the solar system because the current level of science and technology has not yet been reached, and if you want to fly out of the solar system, you must at least ensure that the spacecraft can withstand the high temperature of the sun.