A Jovian chance . . .
Let’s hope that Arthur C. Clarke was wrong.
“All these worlds are yours – except Europa. Attempt no landings there.”
That was the warning sent back to Earth.
In the second book of his Space Odyssey series, Clarke, one of the world’s most prolific science fiction authors, in effect, declared Jupiter’s moon Europa as off-limits to mankind. He envisioned it as younger incubator of life than was Earth.
It was a place that humans should simply avoid.
While obviously fiction, Clarke’s message rebounded again into memory last week when NASA announced its plans to send a spacecraft to the Jovian moon sometime around the year 2020, a decade later than the fictional encounter humans had with Europa in Clarke’s book 2010: Odyssey Two.
The NASA mission, in conjunction with the European Space Agency, would send a pair of spacecraft toward the solar system’s largest planet to survey both Jupiter and its biggest moons at a level of detail unmatched to date.
While Io, Callisto and Ganymede all present their own potentially enticing mysteries, it is Europa that drives human curiosity more. Covered with what we believe is a thick surface of ice, scientists hope that there are oceans of liquid water beneath that shell which might harbor some form of life.
Many believe that if life was is to be found outside Earth in our solar system, then Europa is the most likely host.
It’s not as wild a prediction as some might have thought. Just this month, scientists proclaimed that life abounds prolifically in both the Arctic and Antarctic Oceans on Earth. Identical species by the hundreds thrive in these frigid environments, often capped by thick layers of ice.
If the intensely cold Ross, Barents and Beaufort seas are teeming with life, then why not the vast Europan Ocean, assuming it is actually as we predict it to be.
In Clarke’s novel, whatever power ignited Jupiter, transforming it into a second sun, and sent that cryptic warning back toward Earth, clearly wasn’t bluffing. Humans would disobey at their own peril. But that was fiction, unlike NASA’s plans.
What is troubling, however, is that humans do have a history of mucking things up, leaping headlong into situations without adequate planning. A future mission bent on landing on Europa’s surface and even, perhaps, tapping into that moon’s oceans, raises the risk of contamination.
On Earth, 13,000 feet under a Russian research station in Antarctica, there is a freshwater lake the size of Lake Ontario. Plans to sample the lake’s water for life that might date back millions of years, thankfully, are on hold. We simply do not know how to insure that no contamination will be transferred from the surface.
So if we can’t guarantee the safeguarding of Lake Vostok’s waters, how can we protect Europan oceans, and the life that might exist there?
The good news is, however, that we have time to solve such problems. The launch of the probes to Europa and its neighbors are a decade away and the trip alone will add another half-dozen years. Any planned lander mission would be even later, so apparently, there is time.
That is, of course, unless a giant monolith appears. In that case, all bets are off.__Earle Holland
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Holdren, a past chair of the board of the
And scientists, generally, often misunderstand that informing the public and educating them are not the same, and the approach to succeed in one may differ from the other.