It has been recently announced that astronomers have discovered a possible terrestrial planet in the habitable zone around the star nearest to the Sun, Proxima Centauri. We discussed a little about Proxima Centarui when we discussed the nearest star system to the Sun, Alpha Centauri.
So what exactly does this mean? Terrestrial planets are those planets much like Earth in terms of size and composition. The habitable zone are the parts of a planetary system where water can be in liquid form on the surface of the planet. Remember, that water is a important to life in the universe.
Now, having a Earth-like planet in the habitable zone does not necessarily mean that the planet has water. We won't know for a long time, either.
