Spaceship Earth – Our Only Home

Image Science and Analysis Laboratory, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." (03/20/2010 13:00:07) http://earth.jsc.nasa.gov/sseop/efs/images.pl?photo=AS17-148-22727
One of the first impressions astronauts get with their initial view of the Earth from orbit is just how small it really is. Below them they see the entirety of civilization, the whole of our home in a single gaze. They see just how limited it all is. We live on a rock surviving within a very thin sheath of moisture and air. Take a basket-ball and dip it in some water and shake off the excess moisture and you have our oceans being represented. It’s hard for us Earth-bound folks to conceptualize it. We look out our windows and see… what? A few miles around us. Which seems vast to us. The sky look endless because there’s no reference point for size comparison. The clouds, are they just a few hundred feet up or thousands? It all seems so big to us and it is so easy to get lulled into believing that we cannot possibly have any affect on the world around us. However, a change in perspective is all that’s needed to make us realize that what we have is so very rare and so very precious and so very little compared to the cosmos around us. And most importantly, so very limited. We are effectively on a space-ship.
