Take a last look at the world we call Home. You’ll never see it again. After this generation, and maybe the next, nobody will. It won’t exist.
And we, brave comrades, will not see our next home, nor the several generations which will succeed us. Our new home is far, far too distant. Almost too distant to contemplate. It lies beyond our own planetary system, beyond anything visible to our eyes. Only our most powerful telescopes can see; reached only by a single exploratory probe which has travelled over many of our lifetimes.
Thus our new home has been identified. All available data indicates it is suitable for life. Or was. Remember we are travelling such a very great distance across the galaxy, that what we know about this planet is only its past.
But we are optimistic. No other race could have been so stupid. No other beings would wantonly destroy their planet.
So, brave comrades, we boldly go, across to the westward arm of the great spiral galaxy, to a group of eight planets which orbit a sun, just like ours. Our destination is the third from that sun, a blue planet, and we will call it Home.