Chapter 6 - Distant Worlds

Chapter 6
        The dreamers got there first. In their minds eye, the galaxy was littered with worlds, some living and some dead. Only gravity and crude technology kept us Earthbound. Astronomers have caught up with the vision; after decades of trying, they have discovered hundreds of planets beyond the solar system.
        Earth is a spaceship. Living quietly in a house we trace a corkscrew motion through space as we spin and orbit the Sun. On an even more gigantic scale we conduct a circuit of the Milky Way each quarter billion years, dipping in and out of the star fields of the disk. The first astronauts to orbit the Earth experienced the shock of the new: a small watery planet set against a void. Distant twins of Earth are unnoticed, fireflies next to the floodlights of their parent stars. Astronomers found exoplanets by stealth, detecting the periodic stretching and squashing of the light waves from the star as the planet tugs it around like an unruly dog on a leash. We have found clones of Jupiter and clones of Neptune and Uranus, and clones of Earth are only a decade away.
        Earth is an ark. We know enough about the harshness of space to suspect that the bounty of our biosphere may be special. As we venture out gingerly into space, it will be on multi-generational arks, with passengers willing to take a one-way trip to an unknown future. Our destiny in space is fueled by technology and the exponential rise in computation. Space probes are just extensions of ourselves, projections of our eyes and ears. We are exploring our backyard for now, but these robotic probes will some day travel on the fleet feet of anti-matter. They will build replicas of themselves by mining asteroids and fanning out across the galaxy. It will almost be as if we are there, because they are our creations, our children.
        When the first human adventurers descend on a remote terrestrial planet, nobody knows what they will find: a metallic sea, or a landscape of pure crystal, or life without carbon. They will be satisfying a primal human itch, just as when our ancestors roamed from Siberia to Patagonia in a scant few thousand years.

About the Artist


Heather Green is a graduate student in the College of Fine Arts at the University of Arizona and a second generation Tucsonan. Her current work is informed by her lifelong relationship with the headland of La Cholla near Puerto Peņasco, Mexico, a passion for old science books, and her love of the natural world. She has designed exhibits about sustainable fisheries and materials for conservation initiatives, and is currently developing a virtual museum about La Cholla.

Chapter 6

Distant Worlds

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