Are humans alone in this universe? For many years Scientists are trying to find the answer of this question. Famous Drake equation was intractable and uncertain in science for almost half century. But few days ago NASA's planet-hunting telescope has found 10 new planets outside our solar system that are likely the right size and temperature to potentially have life on them, broadly hinting that we are probably not alone. After four years of working, the Kepler telescope has detected a total of 49 planets in the Goldilocks zone. And it only looked in a tiny part of the galaxy, one-quarter of 1 percent of a galaxy that holds about 200 billion stars.Total of the 10 earth sized found planets seven of them have circle stars that are just like ours, not cool dwarf ones that require a planet be quite close to its star for the right temperature. That doesn't mean the planets have life, but some of the most basic requirements that life needs are there, upping the chances for life.
The scientist gave their theory that all the planets they found in the system are similar in size to Earth and Venus, or slightly smaller. And density measurements suggest that at least the innermost six planets are rocky. Because the star is Millions light year away its not so clear , the planets are warmed gently despite having orbits much smaller than that of Mercury, the planet closest to our Sun.These 10 planets are part of 219 new candidate planets that NASA announced Monday as part of the final batch of planets discovered in the main mission since the telescope was launched in 2009. This Telescope was launched to look at different galaxies and to see how frequent planets are and how frequent Earth-size and potentially habitable planets are. Kepler's main mission ended in 2013 after the failure of two of its four wheels that control its orientation in space.
It is too early to say either these planets have life or not because there are lots of factors to consider in this.Before Kepler was launched, astronomers had hoped that the frequency of Earth-like planets would be about 1 percent of the stars.Now they are hoping it must be around 60 percent, .Kepler isn't the only way astronomers have found exoplanets and even potentially habitable ones. After launching Kepler and using other methods scientists have now confirmed many exoplanets more than 3500 and found about 60 potentially habitable planets.
Sources:
https://www.sciencedaily.com/releases/2016/04/160428095339.htm
http://www.cbc.ca/news/technology/nasa-telescope-10-earthsized-habitable-planets-1.4167686
http://www.chicagotribune.com/news/nationworld/science/ct-nasa-planets-could-have-life-20170619-story.html
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We don't have to look to other plants to find alien life.. Just have to visit your nearest Walmart....