by John Deakins
Before we visit the stars, we need to reach the planets. Each presents unique problems, but all share nasty holdups. Travel time will be measured in months or years. We presently can’t sustain humans in a closed ecosystem that long. Never mind interstellar voyages: You’re going to need suspended animation for humans to reach any planet. Cosmic rays will leave every (normally shielded) astronaut with brain damage and cancer. Jupiter and its moons are also a hot-spot of radiation, because of Jupiter’s near-brown-dwarf status. Suspended animation will require lead coffins, in addition to other problems.
Mercury, innermost, would allow us to use the Sun’s gravity as an assist inbound. We’d have to fight it outward bound, unless we use the Sun as a gravitational slingshot. Even so, we’re talking 1.5 to 2 years for flight. Solar radiation increases as you move toward Mercury.
Mercury’s solar face is a maelstrom of heat and radiation. There’ll be no landing there. It’s still very slowly revolving; every square meter was blast-furnaced sometime. Smelted metals – gold, platinum, uranium - will be accessible from almost any landing. Unlimited energy exists only a few kilometers from the light-dark demarcation line.
Mercury’s back face remains near 20ºK. The Sun never shines there. Energy would need to come from broadcasting satellites using solar super-power. Except for scientific studies, there’s not much reason to land there.
The only barely habitable area is Mercury’s twilight zone, at the demarcation line, at most a few kilometers wide. We could set up a station, in shadow, not too far from solar power, and mine heavy metals. Outside, we could use the element lead the way we use copper on earth. Lead becomes super-conductive in Mercury’s shade, and there ought to be plenty of lead available.
Problems? Getting there will be the biggest problem, but let’s set that aside. Mercury has oxygen, as metal oxides in rocks, but it has no elemental hydrogen or nitrogen. Those must be imported from Earth. Those essential elements were cooked out and lost into space long ago. Once again, we require a closed ecosystem (which we have yet to create) only the humans must remain awake.
As an inner planet, Mercury will have higher than Earth’s background radiation. All building materials will be radioactive, not enough to kill immediately, but enough to sterilize, cause cancer, or produce brain damage, over long exposure. That means either a terminal deployment, or regular, hideously expensive and difficult crew rotations.
How do you approach Mercury? For the flight, Ignore It works best. Concentrate on the need for humans to be there. Remember: If your story line is powerful enough, the reader won’t ask embarrassing questions about suspended animation, radiation, or missing elements. If the human need is great enough, every problem can be moved over to Live With It. Every Mercuryman will plan to die there or in transit.
If you use Unexplained Science, create a radiation-proof energy field for ships and Mercury base. Good luck. Using real science, Mercury remains almost out of reach.
John Deakins, B.A., M.S.T. is a four-decade veteran of the science classroom and lives in Arkansas. As an author, John has fantasy novels in print from the Barrow series.
To read an excerpt from Barrow book one, please click HERE.
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