In the vast universe, is there only one planet like the earth that has human beings?

As it stands, yes. This is because only basic substances such as oxygen and water exist on the earth to support human beings, and human beings can use their wisdom to coexist peacefully with the earth.

I think of course not, because the universe is so big, there must be other planets with life, but we can't find it.

The conditions for life to exist include sunlight, land, oxygen, water and food, and the right temperature, and the planet that meets these conditions may have had life.

I think it should be so, after all, we don't find any evidence of life on any other planet at the moment.

Our deep space exploration is still limited to the solar system, and it is only a small area of the solar system. Humans have only landed on the moon, and other planets can only be detected and monitored by sending probes. Currently capable of landing probes have successfully landed on Mars and are being monitored.

On Venus, many probes are scrapped as soon as they land, while the probes of Mercury, Jupiter, Saturn, Uranus, and Neptune are mostly carried out by flight, making it difficult to conduct more in-depth and systematic research.

The earth's environment is difficult to replicate. The Earth is located in the habitable zone of the solar system and has almost all the favorable conditions for the existence of life, such as a suitable atmosphere, a suitable oxygen content, a suitable distance from the stars, a suitable temperature, the presence of liquid water, the protection of the Moon and Jupiter, the tilt of the axis of rotation, the movement of the inner core, the existence of magnetic fields, etc. , which provides the perfect conditions for the birth and evolution of life.

Without one of these factors, I don't think it would be possible to have a smooth life.

Extraterrestrial life may exist in other forms, such as silicon-based, boron-based, etc. But at present, we do not know much about and study the characteristics and laws of this form of life. Of course, astronomers cannot use this imperfect or unfamiliar standard to deal with the complex and serious problem of searching for extraterrestrial life.

Judging from our current observation methods, the most effective solution is naturally the observation of electromagnetic waves. As for gravitational waves, they haven't played a big role yet. But there is a big problem with the propagation of electromagnetic waves, that is, there will inevitably be a loss of energy.

When an electromagnetic wave signal far away from us reaches Earth, it becomes extremely weak. Gravitational waves can effectively avoid the loss of interstellar dust and planetary shielding, so gravitational wave equipment may observe more useful signals in the future.

In addition to the loss of energy, there is also the issue of time windows. From a historical point of view, such a short period of time is not even a moment in the life of the universe. It is quite possible that other civilizations have developed to use electromagnetic waves to communicate and signal to reach Earth, and we are still in a wild age; When we were able to detect electromagnetic signals, people turned to other methods of communication.

It can only be confirmed that there is life on Earth in the solar system, and no signs of life have been found in other celestial bodies, either in natural conditions or in the results of exploration. Life is most likely to exist under Titan's ice, which is the area where life could theoretically be possible, but will need to wait until new probes arrive.

Of course not. Our universe is very big, so there are many planets in the universe, and there will be a lot of life on other planets, but we just don't know it.

It's not just the earth that has life. There should be many planets with life in the universe, but our technology is not able to detect extraterrestrial life right now.

It's not just the Earth that has creatures, because with the development of technology, people have also found traces similar to creatures on Mars.

No, there are still many unsolved mysteries in the universe, and there are also many unexplored areas, and more detailed information will definitely be available in the future.

In fact, we can't say the same, because there are many planets that we have not explored, and we don't know if there are any creatures living on them.