How long does it take to reach the most similar to the Earth planet?


Let's imagine that was a global catastrophe and we were forced to vacate the Land. How long will it take to get to the most similar to Earth planet, which we found at the moment?

For starters, the most similar to Earth of all discovered is Kepler 452b. We know about this planet, thanks to the space telescope "Kepler", launched in March 2009 and is being hunted by the planet the last 5 years. Kepler 452 — a star similar to the Sun, which is hurtling through space at 1400 light years from Earth. It should be noted that this star has the same surface temperature that our Sun, and almost the same energy output.

In General, as the Sun, and Kepler 452 is a yellow dwarf, G-type. This means that the habitable zone Kepler 452 (area around a star in which, theoretically, can exist as liquid water) is almost identical to the sun. And interestingly, in this area around this star is spinning planet, the path of which is almost identical to earth's, Kepler 452b. This planet takes almost the same place as the Earth in the Solar system.

From this it follows that the length of a year on this planet almost identical to ours, and the amount of energy that a planet receives is strikingly similar to that received by the Earth. The orbit of Kepler 452b closes for 385 days and gets only 10% more energy than the Earth.

Scientists cannot measure the mass of Kepler 452b directly, but the findings, based on modeling, indicate that the planet is only five times more massive than Earth (almost 60% more). This clearly indicates that this solid world is similar to ours, and it is very good (we've yet technology stay on the gas giants). In addition, the gravity is two times larger than the earth. This can significantly complicate the life on the planet, but in General it makes living impossible (if only we can get there).

A little bit of mathematics

For starters, let's define what a light year. This is the distance that light can cover in one year (obvious, isn't it?). Light travels a billion kilometers per hour. This means that in a year light travels 9.5 trillion kilometers. 1400 light years is approximately 13.3 quadrillion kilometers. If we run to the planet fastest its probe, "New horizons", which is currently moving at a speed of 50 000 km/h, it will take 26 million years to get to a new destination.

By this time all life on our planet will likely become extinct.

For comparison, modern humans evolved approximately 200,000 years ago. From Africa we went at the earliest 130,000 years ago. These numbers are not nearly comparable to 26 million years, that we need to reach Kepler 452b.

But what if we develop technology better? Can we ever fly faster?

In fact, will not be much better. Even if we travel at the speed of light (the maximum possible speeds at the moment), we will need 1,400 years to achieve the desired planet. If our ancestors left this world, they would have to move in 615 BC to get there by today.

Of course, travel at this speed means that the game will take a slow time. Thus, those who will be on a ship will feel like it's only been a century. But for the Universe (and everyone else in it) the flight will take 1400 years. In the end, when our people will arrive to the destination, if not the universe, then the Solar system will change significantly.

Of course, there are other planets to which we can go, some of them located much closer. Alpha Centauri Bb, which is nearest to the Earth, a planet outside our Solar system, for example. It should revolve around Alpha Centauri B, although this is not accurate. And yet, if we admit its presence, it is 4.37 light years from Earth. Traveling at the speed of light, we would have gotten to her in just four years.

However, even if it is there, it is unlikely that we will want to visit because the planet is located very close to the parent star. Orbit it completes in 3 days and 5 hours. The planet is unbearably hot and unable to support any kind of life.

So let's just hope that a global catastrophe that is able to cause our Solar system to death, just will not. At least we should settle in time. published

P. S. And remember, only by changing their consumption — together we change the world! ©

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