Earlier this month, the Kepler space telescope spotted three planets of Earth-like size orbiting in a nearby star’s “habitable zone,” or the area around the star in which water could exist in liquid form on a planet’s surface. However, the planets they found, along with the other 26 Earth-like exoplanets found thus far, do not perfectly mimic our own planet and have been deemed uninviting to life as we know it.
After searching thousands of systems and discovering close to 2,000 planets outside our solar system, none look promising of supporting human life should we ever need to find a new home, which begs the question: is our system unique? Given the infiniteness of space it seems unlikely, but we have yet to prove that true. Perhaps the conditions that brought about our home, with days just long enough to warm our surface, but not so long that our ground is cooked, and a million other chance occurrences, really do make us one of a kind.
Source: http://www.iflscience.com/nearby-star-has-three-planets-slightly-larger-earth-one-habitable-zone
conorastr201 
This article is interesting. I think this article is promising for the possibility of habitable planets. It’s important to keep in mind that these planets are seen from Earth. These planets are extremely far away and outside our Solar System, which means that they are light years away. We are observing the past of the planets, and these planets are liable change. For instance, it is speculated that Mars had oceans that eventually dried up. These 2000 planets may undergo transformations that will drastically alter them into more hospitable environments.
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Grader here!
It’s true, planets that look exactly like Earth are not very easy to find. It’s hard to think that we could be unique though, especially since we’re getting new detection methods and finding more and more new extrasolar planets all the time. There are so many planets out there and so many different earth-sun configurations, who knows what we’ll find.
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Grader’s comment: Hi, I’m Victor and I’m one of the graders for the blogs. Good post! I agree with the fact that it has proven to be a difficult task to find other planets that can host life, but that doesn’t mean we should not look for them. Maybe in the coming years, technology will be sufficient to detect the kind of planets that can host life. It’s just a matter of time until we find an Earth-like planet in the rest of the Universe. Until then, we should always keep trying to find them.
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