The People Who Protect Other Planets From Earthlings

“All of the planets, all of the time.” —Slogan of the Office of Planetary Protection

In A Nutshell

NASA has a division called the Office of Planetary Protection which works kind of like a reverse Men in Black. Part of their mission is to ensure that Earth does not biologically contaminate the rest of the universe with our pathogens. One of their key tasks is building spacecraft components in “clean rooms” to make sure that each craft is as sterile as possible.

The Whole Bushel

When the Apollo 11 astronauts returned from the first walk on the moon, the men were not immediately subjected to ticker tape parades and television appearances. Instead, they were kept in a converted Airstream trailer for 21 days under tight quarantine on the off chance that they may have brought back some contaminants from the lunar surface. Today, we understand that the moon is devoid of life, but at the time it was a valid concern. The human immune system would be practically helpless against alien viruses, much in the way that Native Americans were decimated by smallpox carried by Europeans.

Conversely, NASA understands that humanity has its own host of nasty sluggers. To this end, they developed the Planetary Quarantine Program, which would later become the Office of Planetary Protection. This agency works as sort of a reverse Men in Black, aiming to preserve not only life on Earth, but any potential life throughout the universe. Each mission is different and the requirements for each are carefully tailored: Protocol for the Mars Rover, Curiosity, might be different than that of a lunar module.

A single human body teems with bacteria—there are more bacteria on your body than there are human beings on the planet and at that rate, it might seem impossible to fully shield the galaxy from our germs. But they make every effort. Spacecraft components are built in “clean rooms” whose filters and air flow systems leave them practically void of contaminants. Workers are forced to dress in masks, gloves, and protective suits. Then, the spacecraft are sterilized. This was formerly accomplished by sheathing them in a ceramic shell and then baking them for 30 hours. Today, they are moving toward sterilization with freezing vapor phase hydrogen peroxide. Often, other NASA personnel are not particularly enamored of Planetary Protection Officers, because their demanding standards make things much more difficult.

Given the inhospitable nature of the rest of the known solar system, it seems unlikely these measures are necessary. On Venus, for instance, the average temperature is a balmy 485 degrees Celsius (900 °F). By comparison, Uranus clocks in around -240 degrees Celsius (-407 °F), not too far from the theoretical “absolute zero.” Coupled with raging storms, atmospheres of ammonia, sulfuric acid, carbon dioxide, and the like, it would seem that even the hardiest organism would have trouble eking out a living.

However, there are creatures called extremophiles, such as the tardigrade (or water bear), that can endure conditions that would kill other animals in mere moments. The tardigrade in particular has been shown to be capable of withstanding the vacuum and solar radiation of outer space. Other animals are capable of living at the bottom of the Mariana Trench, the deepest part of the ocean, nearly 11 kilometers (7 mi) below the surface, where the pressure is more than 1,000 times that of sea level, and sunlight does not penetrate.

After innumerable journeys into the cosmos, we seem no closer to finding life, but with commercial space travel becoming increasingly likely, the importance of maintaining a barrier between terra firma and that which lurks among the stars is greater than ever.

Show Me The Proof

HowStuffWorks: NASA Planetary Protection
Telegraph: What’s the weather like on other planets?
BBC Nature: Tardigrades: Water bears in space

  • CSisonweb

    Is Will Smith a member or not?

    • Marozia

      Probably. Tom Cruise also.

  • MercedesKnudson

    I am saying that How to protect myself from other Planet in the earthling?

    • TheMadHatter

      Y u up vote this spam, Marozia? Y U UPVOTE?

  • Andyman7714

    The tardigrade is probably already from another planet.

  • Nathaniel A.

    The real danger seems to be if an extremophile was accidentally transported by an exploratory craft, and we come back hundreds/thousands of years later to find an indestructible nightmare.

    • ScepticSid

      The world would be destroyed by something that looks like an old couch, with claws and a cannon in its head.

      • oouchan

        It’s cute!
        However, cute things tend to kill people.

        • lbatfish

          Dropbears, for example. It’s been a couple of months since the last time this was posted, so . . . .

      • Nomber

        The fucks that! ? eeew!

  • The Ou7law

    Its definitely this guy right here

    • oouchan

      I’m pretty sure it’s the guy riding in this….

  • oouchan

    Good article with good info. Would think that we need to focus on the small things that might get us and not a huge spaceship that would appear.


    • Lisa 39

      Have you ever seen “the faculty”?

      • oouchan

        Yeah! Long time ago. Good movie…it did creep me out. That would be how it starts…simple and looks like us….or something like Invasion of the Body Snatchers.

        • Lisa 39

          Another good movie! In the faculty elijah wood said something about aliens sneaking in quietly for an invasion as opposed to an attack, that made me think, sneaky aliens.

  • TheMadHatter

    “to make sure that each craft is as sterile as possible” well they haven’t researched birth in space yet so I guess this is a good idea, but idk if the astronauts are k with it. I mean don’t they want kids? It just doesn’t add up to me, whatever though.

  • Scott

    As long as I’m allowed to share my seed with any aliens we encounter, I’ll be satisfied.

  • Liege_Lord

    The concern of alien pathogens from space anhilliating native species is slightly more complex than “look at what happened to the Native Americans when the Europeans came!”. That is some serious elementary level thinking which does not count for some pretty important variables. Also, War of the Worlds is a movie, not supporting evidence.
    The fact remains that the Native Americans and Europeans have something in common… lets see… they were both… human! Sure, there were cultural and developmental differences, but we all come from the same place. We have the same bodily functions, and are made of the same elements. As the hippies like to say, there isn’t race, just the human race.
    As recently supported by science, aliens could even be silicion based, it is very shortsighed to assume they will be carbon-based human like creatures. Case in point, is it possible for a completely alien pathogen to kill another alien species, yes but incredibly unlikely. A more likely scenario would be nothing would happen, as each organism evolved completed and entirely seperately with no genenics in common. There would be no reason or benefit for the alien pathogen to “attack” the foreign species, it would most likely not have the celluar (or whatever it is actually composed of) makeup to interact with the foreign body.
    I’m not saying its impossible, I’m just saying, when you think about it in the terms I have presented, it kinda makes sense.

  • Really can’t imagine what are there in the universe. It feels like a never ending space.