How Close Are We To Finding Another Earth?

Space





Photo credit:

Romolo Tavani/Shutterstock.

Do the maths: billions of planets per galaxy, and billions of galaxies in the universe. It’s unlikely that only one of those has all the characteristics of our own – Earth-sized, orbiting a Sun-like star, and slap bang in its habitable zone where water can form.

Why are those characteristics so important? Well, Earth is the only planet we know to have life on it. It makes sense, therefore, that if we find a world exactly the same as our own, then it would at least be potentially habitable, and may have life existing on it presently.