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There is thrilling news for fans of our nearest planetary neighbor, the mysterious and beautiful hell-world, Venus. NASA has just announced two exploratory missions to Earth’s hot-mess of a twin. Long-time readers know that, in addition to dreaming of floating cities and artificial ecosystems on Venus in the future, Ferrebeekeeper is fascinated by the planet’s past.
In the early twentieth century, astronomers thought that beneath the clouds of Venus, there might be a lush jungle or tropical swamp teeming with strange sensuous lifeforms. Alas, the first probe to descend below the clouds melted on a surface hot enough to, uh, melt solidly constructed Soviet space probes. Enthusiasts of space colonization (and enthusiasts of exploring planets that a human visitor might possibly survive) quickly turned their attention elsewhere. But those sweaty palmed early twentieth century space buffs were not necessarily wrong. A billion years ago, Venus may well have had liquid oceans and temperate skies (if not necessarily lizard men and sultry Amazons), but then something went appallingly wrong and the world melted. The seas boiled away (assuming they ever existed). The sky turned into a mad scientist’s pressure cooker, and the surface turned inside out through a strange planet-wide volcanic process.
If this happened to your next-door neighbors’ place, you would probably be curious about what happened! Even if you didn’t care much about your neighbors, there would be prudent reasons of self-interest to figure out why their once comfy home was now 470 degrees Celsius with an atmospheric pressure akin to what is found a kilometer below the waves of Earth’s oceans! However what happens in a speck of light in the night sky is an abstract concern to a lot of people and Venus exploration has languished for decades…until now!
NASA has finally decided to see if Venus ever had liquid oceans or a surface akin to that of Earth. In coming years, the space agency will launch the DAVINCI and the VERITAS missions. Davinci will feature a spherical falling probe which will comprehensively assay Venus’ atmosphere as it drops through the clouds. Not only will Davinci sniff for traces of a lost ocean, it will seek other gases and volatile compounds which can tell us about the past of the planet (and whether we could build a flying cloud city there in the present). It will also photograph the perplexing “tesserae” features of Venus’ surface in high definition.
Veritas is even more concerned with the surface of Venus and will scan and observe the planet by means of next generation imaging technology. This should tell us about the surface (and deeper features) of the planet and finally answer whether the planet is still geologically active and document what it is actually made of. Answers to profound questions about our sister world are finally forthcoming! If you would like to know technical specifications about these missions, you should head over to NASA’s webpage.
We will be talking more about Venus as the missions get closer, but isn’t it thrilling to finally have some good news!
The Curiosity Lander as Photographed by NASA’s Mars Reconnaissance Orbiter
There can only be one subject for today’s short post: congratulations to NASA for successfully landing the large space rover Curiosity on Mars! The touchdown was a stupendous triumph of engineering and space-faring: you can check out the ridiculous precision which was required on the NASA produced digital animation Seven Minutes of Terror. There is even an amazing photo of the actual landing taken from NASA’s Mars Reconnaissance Orbiter, a multipurpose spacecraft which has been orbiting Mars and diligently assembling a comprehensive picture of the place.
Artist’s Conception of Curiosity Approaching Mars
The Curiosity is a very alien looking vehicle. A deliciously irony about our space exploration program is the extent to which our current technology resembles the clichés of the golden age of science fiction. The Curiosity literally arrived via flying saucer. It has six insectoid wheeled legs and a laser blaster! If it landed it my back yard I would grovel before it and offer to take it to the president or maybe throw a hatchet at it and call the Air Force (depending on how I construed it intentions).
Artist’s Conception of the Curiosity Rover Investigating a Rock Surface
The Curiosity beamed back a few photos from Mars to prove it arrived safely: now it will go through a series of diagnostics and start-ups before the real research gets started. The actual measurements it takes will be pored over by astrophysicists and geologists for decades. However, in a larger sense, a substantial chunk of the real research has already taken place—the scientific and engineering challenges which went in to creating the lander are as big a part of the program’s utility as the information stream from the surface of an alien world.
Of course the success of the Curiosity has a frustrating side: the comments on all of the news sites were filled with complaints from myopic Luddites who were angrily whining that the United States is wasting its money on Mars. “We humans need to get our own house in order before we start worrying about red rocks on Mars. There are millions of children who go blind every year from parasites and malnutrition and you’re worried about sending a robot to Mars to collect stupid red rocks,” wrote Matthew Smith in a typical anti-research anti-progress comment. Fortunately, such views seemed to be a minority today, but they always call for a stern rebuttal. Many of the the technologies which we use every day and undergird our economy grew from the space program (and related defense research). To cut back on such research is to abandon our prosperity and technology leadership in the future but, more worryingly, it is to abandon the future.
Humankind needs to understand both astrophysics and aerospace engineering far better: missions like Curiosity are a way to accomplish both those goals. Additionally Curiosity is working on some questions unique to Mars, a world which once had oceans and an atmosphere and now does not. That seems like something we should understand better for its own sake, but it also suggests that microscopic life might still dwell on Mars (or at least the remains of extinct life could exist in fossils). Finally, we did not spend the money on Mars. The government spent all of that money here, on salaries for engineers and scientists and on R&D for high tech industries. China is amazingly proficient at penching pennies and producing plastic junk, but it will be a long time before they can build anything as complicated as the Curiosity and the equipment which took it to the surface of Mars (although hopefully they are trying—we could use some new partners in space and some friendly competition might get us moving a bit faster).
Goodbye old friend...
The space shuttle program ended this morning when the Atlantis lander touched down at 5:57 AM Eastern Standard Time at the Cape Canaveral spaceport. The national and international media has elegiacally noted the end of the 30 year program, most commonly with articles which sound a dirge-like note concerning the final end of the manned space program (with undertones of America’s decline as a spacefaring, scientific, and military power as well). I am glad those articles are out there because I feel that our inability to ensure adequate funding for basic blue sky research has put the nation’s economic future in jeopardy. Since the dawn of the Industrial Revolution, national greatness has come not from abundant natural resources or a large hard-working population (although the United States has both of those things) but from innovation after innovation. To quote Representative Frank Wolf, a member of the NASA appropriations committee,“If we cut NASA, if we cut cancer research, we’re eating our seed corn.”
We are all the turkey...
However, I am concerned that the story is becoming a self-fulfilling prophecy of defeat and it shouldn’t be. Despite its ever shrinking budget, NASA is actually doing a great deal in space right now as, to a lesser degree, are the world’s other space programs. Five days ago NASA the spacecraft Dawn went into orbit around the protoplanet Vesta, the second largest object in the asteroid belt. Next July Dawn will power up its ion thrusters and fly to the dwarf planet Ceres, an enigmatic pseudo-planet which seems to harbor secrets of the solar system’s beginning under its oceans. Dawn is only one of ten planetary missions currently in orbit (or, indeed onworld) across the rest of the solar system. These are MESSENGER, Venus Express, Chang’E 2, Lunar Reconnaissance Orbiter, Mars Odyssey, Mars Express, Mars Reconnaissance Orbiter, the Mars rover Opportunity, Dawn, and Cassini. Additionally the following eight spacecraft are currently in flight: New Horizons is headed for the dwarf planet Pluto, Rosetta is currently flying to the comet Churymov-Gerasimenko, Japan’s Akatsuki and IKAROS are both in solar orbit, the spacecrafts Deep Impact and ICE, are awaiting further instructions, and finally Voyager 1 and 2 are still out there exploring the distant edge of the solar system. I picked out the projects involving NASA in green (I have already written about the Japanese solar sail Ikaros and our Mercury mission so check out my hyperlinks). These are just the far traveling missions–there are also dozens of near-Earth spacecraft studying the sun, the stars, deep space, and, most of all, the earth.
NASA Spacecraft Dawn firing its ion thrusters with Vesta and Ceres in the Backgound
The shuttle program is not quite as dead as it seems, the Air Force still has two small robot space shuttles and DARPA (the Defense Advanced Research Projects Agency which spawned all manner of world changing technology) is working on next generation spaceplanes. A single-stage-to-orbit space plane (which takes off and lands like a normal plane) is still far off, but aerospace engineers seem confident they could build a two-stage-to-orbit crewed space plane around scramjet technology.
Artist's Concept of a Scramjet Spaceplane Entering Orbit
I’m going to miss the shuttles—the white behemoths were major features of my childhood. Back in the early eighties they seemed to hold out all sorts of promises for a glorious future in space. But childhood comes to an end and the shuttles really never lived up to expectations. Now as we Americans sit grounded (unless we want to pay the Russians 50+ million dollars for a seat on one of their old Soyuz spacecrafts), it is time to think about what we want. Maybe humankind will catch a break and see breakthroughs in molecular or nuclear engineering which leave us with a new range of materials and energy possibilities (despite its long quiet phase, I still have high hopes for the National Ignition Facility). I have always harbored fantasies of a nuclear power plant on the moon with an attached rail gun for space launches. I also like the idea of a space elevator, or a twirling toroid space habitat with false gravity. The always deferred Mars mission is exciting too (although we have talked about it so long that some of its glitter has come off). But I’m open to other ideas. We all should be. We need to talk about it and then we need to decide on some ideas and fund them quickly. Seeds need to be planted to grow.
If we call it an orbital railgun, people will be upset. How about "orbital railfriend"?
ferrebeekeeper 