What opportunities for humans when they cannot live on Earth?

In fact, we face huge limits, almost unbreakable to be able to travel space, explore the universe, and search for planets of life.

>>>Life on Earth will be destroyed after 3 billion years

In the Interstellar film we can see the uneasy difficulties in finding the land that can live in space, when the Earth is about to become a dead planet. It sounds quite new to the apocalypse on Earth, but recent signs such as the record high Earth average temperature, ice in the Arctic melts almost as much as 27 years ago, has made scientists really worried about the future of the Earth.

In addition to efforts to improve the Earth and prevent climate change, scientists also strive to find planets that humans can live on to replace the Earth in the future. However, things are not as simple as we see in fictional movies. When people travel in space for many years by hibernating, then land on a certain planet to explore life, reporting to the center if there are enough elements that people can live on. , then there will be huge spacecraft transporting people up there to create the 2nd Earth.

However it is only in the movies that we often watch. In fact, we face huge limits, almost unbreakable to be able to travel space, explore the universe, and search for planets of life.

Speed ​​limit of nature

Nature has a speed limit that nothing can overcome, which is the speed of light at about 300,000km / s. It also means that today's most advanced technology spacecraft will never pass this speed limit.

Meanwhile the universe is very large, really very wide. Imagine we have a spacecraft that can reach the speed of light. We will only take 8 minutes to reach the Sun, which takes about 3 years to reach the nearest star outside the solar system. But we will take 27,000 years to reach the center of the Milky Way and take 2 million years to reach another Galaxy.

However there is one thing we still see in fictional films and also a theory that scientists are studying, which is the worm hole . It's like a tunnel connecting the two curving spaces, by going through the worm hole we can save a lot of time to reach very far places in the universe. However, this is still a hypothesis being studied.

Limit the engine of the spacecraft

In fact today and in the future, the propulsion engines of the launch ship into space are based on Newton's 3 law. To move forward, we need to push an equivalent force backwards. According to scientists' calculations, in order for a person to reach the speed of light, the propulsion must create repulsion equivalent to the mass of the entire universe. Therefore, even the speed of 0.01% of the speed of light is the limit that we can hardly overcome.

Find a planet that can live

The vast universe adds speed limits that make it difficult to explore the universe, if not impossible. However, somehow we can go anywhere in the universe, it is not easy to find a suitable planet to live on for Earth.

According to scientists, the planet must have a water ocean and orbiting a star like the Sun. But for humans to live, not only does the water and the Sun, the atmosphere and the ecosystem on Earth go through periods of tremendous change in history, not any coincidence. Any other on a planet can be similar.

Not only that, if we find a planet that has all the above elements, but not at the right time, all hopes are gone. Like our Earth, with full conditions to develop life. But over a period of time ravaged by humans, the Earth will at some point lose these elements or create substances that are toxic to humans. Therefore, every habitable planet has its shelf life, before it is transformed into a dead planet for some reason.

So why are we still trying to discover and search in the universe?

The reasons above explain very clearly and prove that people will forever be unable to find a planet that can live to replace Earth. So why do scientists still work relentlessly to discover and search in the universe?

The answer is actually because we want to learn new and curious things with the mysteries in the universe. The practical purpose of space projects is to exploit the potential of stars and asteroids in the solar system.

Firstly, solar energy is an almost limitless source of energy, so scientists are trying to make the most of this energy source in place of traditional energy. Besides, we can exploit metals on asteroids in many times the total reserves on Earth.

So if one day the Earth is no longer a place where people can live. We will also be unable to find a planet to replace in the vast universe. However, the last hope of humans is to build space stations, with solar energy, asteroids extraction materials and water and air systems.