Right now the biggest challenge to my cognitive capacity as a blogger is picking which outrage to focus on. Writing about any one outrage seems to be distracting us from thirty-seven others. But I can only discuss one at a time so here's the absurd outrage of the day. The Dumpster, for unknown reasons,* has withdrawn the nomination of Jared Isaacman to be NASA administrator. Isaacman is a long-time associate of Muskmelon and shares the commitment to colonizing Mars, so that's not the reason. But the new nominee will as well since the Dumpster has said that's what we're going to do. When Isaacman was first nominated he said this:
With the support of President Trump, I can promise you this: We will
never again lose our ability to journey to the stars and never settle
for second place. We will inspire children, yours and mine, to look up and dream of what is possible. Americans will walk on the moon and Mars and in doing so we will make life better here on earth.
Er no, we won't. First of all, we can't "lose our ability to journey to the stars" because we have never had any such ability and we never will -- at least not unless our fundamental understanding of the universe is somehow radically wrong, or our descendants are for some reason willing to 'invest in dispatching a vessel that will take thousands of years to reach its destination. So let's dismiss that, and talk about Mars.
Humans will never colonize Mars. First of all, there is no reason to do so. I am aware of three proposed rationales. Muskmelon has said he's worried about the sun becoming a red giant and expanding to consume the earth. I'm less worried about that then he is because it won't happen for 5 billion years, so I'm willing to be patient about finding a solution.
The second rationale is that there might be some possible economic benefit -- as Isaacman said, "We will make life better here on earth." Well, that's easy to say but it's completely ridiculous. Even if there were some resource on Mars (or the moon) that might be of some use on earth exploiting it would be impossible. The average distance between Mars and earth is 140 million miles and the closest it ever gets is more than 35 million miles. A journey to Mars requires at least a year and a half and a round trip is three years. Getting anything back from Mars would require sending a fully fueled rocket ship to Mars as a payload in order to ship the stuff back, but the problem is there is absolutely nothing there more valuable than iron, which I believe we can find close at hand.
The third rationale is that we are destroying the habitability of our own planet so we need an escape plan. Apart from the obvious retort that a better plan would be for us to stop doing that, there is no Planet B, certainly not Mars. There are actually quite a few good, succinct essays that make this ineluctably obvious, but I kind of like Albert Burneko on this. In the first place, Mars has no magnetosphere, and a very thing atmosphere. That's pretty much game over. As far as your radiation exposure, if you're on the surface of Mars you might as well be in outer space, which means you are constantly bombarded by protons from the sun and ionized particles of just about every element there is in cosmic rays. That means you'll get cancer.
Believe it or not, NASA's proposed solution to this is to develop ways of re-engineering the human body so it is better at DNA repair. While we're waiting for them to figure that out (without the help of NIH funding for biomedical research, which is apparently being phased out), we have a few more problems to consider. Nothing to breathe, nothing to eat, average temperature of -63 C (-81 F) and low temperatures near the equator of -107 C (-161 F), and frequent dust storms. We don't know what the long-term consequences are of living in 1/3 earth gravity, but there's very good reason to believe they are disturbing to contemplate. Life is not very pleasant.
Burneko points out the obvious. Nobody has even thought of colonizing Antarctica or the icy summits of the Himalayas, but they are vastly more hospitable than Mars. The air up on Everest is too thin to sustain us, but the atmosphere in Antarctica is better than it is in most actual places of human habitation -- no pollution to speak of. The sun is almost twice as strong as on Mars so you've got much better potential for photosynthesis and photoelectricity. It's easy to fly in supplies including food and fuel, and you can actually burn the fuel. Communication with your friends in friendlier climes is instantaneous, and you can leave any time you want.
But nobody has even contemplated trying to set up any sort of self-sustaining colony in Antarctica. The small scientific research stations are maintained at great expense and the people who spend time in them are generally miserable and suffer psychological damage. Otherwise, the interior of Antarctica, like the summits of the Himalayas, is a lifeless desert, because it's too cold for anything to survive -- and the coldest temperature ever recorded in Antarctica, -98.2 C, would just be an ordinary day on Mars.
So no, it's not going to happen. You don't have to take my word for it, or Burneko's. Here's Danielle Teller, Sarah Scoles in SciAm, and I could give you a dozen more. It's completely ridiculous. But it's worse than ridiculous because the boondoggle will consume immense resources, contribute hugely to carbon pollution of the atmosphere (rocket fuel burns, right?), and displace far more useful scientific and technical endeavors. Ergo, it's morally depraved as well as idiotic and insane. But I could say that about everything our federal government is doing right now.
*Probably because he has a history of making donations to Democratic politicians.