When we are talking about our planet, Earth, we instantly think about perfection, about a creation so impressive and complex that you could spend a huge amount of time in order to understand it and you would still be able to find new things.
Our planet is so well placed and created that it actually manages to support life forms. It is not too close to the Sun and at the same time not too fa
r, we are not burning alive, we are not freezing to death. Everything works together perfectly and so we can exist.
But then, as a human being capable of using a basic cognitive process, you start wondering: “Are we the only beings in the universe?” or “Is our planet unique?” and indeed those are good questions. Anybody thinks at least once about this huge space surrounding us, is everything out there just worthless? Are all the stars placed out there just to provide light for us?
A good example would be the planet called Gliese 581 c, found at 20.3 light years from Earth (192 trillion km or 119 trillion miles) . The planet was found orbiting the star “Gliese 581” , a red dwarf star. It has a mass at least 5.5 times that of the earth and can be found in the habitable zone of its star, allowing the existence of liquid water on its surface and in the same time of Earth-like life forms.
1. Kepler-22b: 600 light-years away, 2.4 times Earth’s size.
2. Kepler-69c: 2.700 light-years away, 70 percent larger that Earth.
3. Kepler-62f: 1200 light-years away, 40 percent larger than Earth.
4. Kepler-186f: 500 light-years away, 10 percent larger than Earth.
5. Kepler-452b: 1400 light-years away, 1.6 times Earth’s size.
Things like that make you wonder, what else is out there that we do not know about. Those are the kind of discoveries that we make and can change the way we see the Universe.