In a path-breaking discovery, an Earth-size
planet that could boast water, even an ocean, has been found circling the star
nearest our sun. The planet is said to be rocky and warm enough for liquid
water to pool on its surface. Scientists say that this planet will be the most
closest habitable zone. The new planet circles a small star called Proxima
Centauri, which is only 4.2 light-years away.