(1) Flying in a near vacuum environment
Navigating between different star systems is preferable to have a large fleet, just as the solar system is a fleet, but we do not have the ability to control this fleet!
Navigating the interior of a star system, the current scientific and technological foundation of human beings is there, and what is required is investment, patience, time, etc.
(2) Flying in gas
Flying within planets with atmospheres, we humans have had a hundred years of experience and have mastered it.
In the air, a relatively small amount of thrust, combined with an understanding of aerodynamics, can fly, can cross the ocean, and even without landing, a single round-the-world flight is really spectacular.
(3) The dilemma of flight
For a long time, the earth is still the base camp of human beings, if you want to go out, you must first cross the atmosphere, enter other stars, such as fluorescent stars, but also re-enter the atmosphere, the atmosphere is different, or the composition of gases and the proportion of internal elements are different, but it causes certain troubles to human beings.
Although gas resources can not be used, only fossil fuel rockets are used as propulsion or attitude adjustment power, but the burden is heavier after all.
The history of human aviation on the earth for more than a hundred years, how to develop into the history of space aviation, is a need to think carefully.
The energy level, which represents the distance of dreams, can be based on existing theories to expand the ability to fly on other stars.
Breakthroughs in theoretical physics, cosmic materials, etc., are the underpinnings and opportunities for completely changing the flight mode.
Prior to this, on Earth, the aviation propulsion method continued to develop, and this direction was not only not a declining field, but was waiting to break through the cocoon into a butterfly.
Looking forward to the birth and development of astronautics.
Interstellar flight
Aviation propulsion systems
Multi-faceted aircraft