Man's Second Earth

In 20 15, the European research team used Kepler telescope to discover a magical asteroid 0/500 light-years away from the earth. It is located in the Cygnus galaxy and is the companion of a star named "Sass -32".

People call this promising planet "kepler-452b" according to the naming rules. This is an event worthy of a great book in human consciousness, and it is also the first time in history that planets so similar to the earth have been discovered, and their basic conditions are extremely similar. According to scientists, this planet meets all the conditions of the earth, and the most important thing is that a huge ice layer is found on its surface, which means that it is basically suitable for human habitation.

2. Basic overview of "Earth relatives"

The diameter of kepler-452b is about -452b% larger than that of the Earth, and its annual cycle and the degree of influence by its parent star are similar to those of the Earth. More importantly, it is covered with a thick "protective layer", which is very similar to the ozone layer of the earth. The period of revolution of 452b is about 390 days, almost the same as the Earth. Kepler 452b has twice the gravity of the earth. If we do land one day, our backpacks will be much heavier than those on earth, which may limit the radius and efficiency of human activities.

3. Detection of significance

The Kamida index of Kepler 452b and the earth is 86%, which means that the similarity with the earth is almost the same, which is also the main reason why scientists are extremely excited. After the discovery of Kepler 452b, when people observed other stars nearby, they found that many planets in this area were highly similar to the earth, which was of great significance. By observing these terrestrial planets, people can predict the future direction of the earth and study the past events that have happened on the earth before.

The earth has existed in the vast universe for billions of years, and it has been lonely for billions of years. We hope that Kepler 452b will be the real second earth, so that human civilization can be passed down and continued.

The discovery of more and more exoplanets, even candidate planets in livable zones, does it mean that we are getting closer and closer to interstellar migration?

At the speed of 17 km per second, it will take Voyager 1 about150,000 years to fly to this planet.

It takes about 12736 to fly to this planet at the speed of 300 kilometers per second at the perihelion of NASA Parker Solar Probe.

In other words, even if more terrestrial planets are found in the livable zone, human beings need to make a particularly significant breakthrough in science and technology in order to truly realize interstellar migration.

In fact, there is no contradiction between Ad Astra and protecting the earth. In fact, they are two sides of the same goal: understanding, protecting and improving future life. The extreme environment on our planet is a strange sight. It's just that they are closer to us. If we can know how to create and maintain habitable space in these harsh and uninhabitable environments on earth, we may be able to meet the dual needs of protecting our environment and "going out".