There must be following factors necessary for the existence of life in any planet:-
Normal temperature, neither so cold nor so hot
Presence of air, oxygen
Proper food and clean water to drink
Recently, astronomers discovered a new planet in the Goldilocks zone which has almost all suitable facts for life. The planet Goldilock is located in a habitable zone. Here the term habitable indicates an area in space where the temperature is normal, neither too hot nor so cold and liquid water can exist.
Paul Butler of the Carnegie Institution of Washington told about the discovery at a National Science Foundation News Conference on Wednesday that recent discovered planet has to be at the right distance from the star. With existence of normal temperature, the surface gravity is also suitable on this planet.
He also added that from many years they were looking for right planet and they have found so many but none of them have suitable distance from their suns and enable for the existence of water.
The name of the new planet is Gliese 581-g. Although the planet has all basic necessities for life like present at right distance from their sun as well as it has the suitable amount of mass to hold onto an atmosphere but Astronomers are still looking for physical evidences of water on it
On having all these facilities, we can say that on Gliese 581-g planet we can find life in abundance in future. Moreover, the team of astronomers will continue their efforts to analyze the environment of the planet to know more