Where/how do you believe consciousness originates?
What do you mean exactly by 'realism' and 'materialism'?
That doesn't make very much sense to me, we occupy one tiny fraction of a percent of the available space in the known universe, and as far as we know, we're the only life there is. The amount of space that doesn't support life is magnitudes greater than the space that does, furthermore the one thing we do know life as we know it requires is water which is an extremely scarce resource outside Earth. Being able to support life isn't the same thing as being hospitable to life, one is the bare minimum requirements like thermal vents at the bottom of the ocean, the other is flourishing resources like the surface