Scientists have made calculations and estimates, and concluded that about one in every fifth star in our galaxy may have a planet that can be hospitable to life. Hospitability means that the planet is orbiting its star at a distance where it is not too warm and not too cold, but that liquid water can be abundant. The planet also has to have a size that is not too small, it has to have a gravity holding the water and an atmosphere in place. It also cannot be too big.
This is positive news for everyone who sees a future for men and dogs on other celestial bodies than Earth. Our chances of long time survival as species increase, if some of us leave Earth and colonize other worlds. If we find planets to go to, it is not futile to work towards the end of going there. I hope this lies in the future.
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