There are big headlines coming from NASA this weekend. Two missions reaching milestones.
The Spirit rover will be touching down on the surface of Mars (how cool to even be able to type those words – and they’re true!) inside Gusev Crater at 04:35 Jan. 4, 2004, Universal Time (11:35 p.m. Jan. 3, EST.) Spirit’s twin, Opportunity, will reach Mars three weeks later.
Compared to earlier Mars explorers, these two rovers are more sophisticated and should bring back better and more complete scientific data. Scientists are constantly intrigued by the twin possibilities of water and life on Mars – though we would be talking about life much simpler than found on Earth… more like complex chemistry than what you’d consider living things.
As sexy as that is, I think the really exciting mission is the one that will get less publicity.
A few hours ago, the Stardust mission flew by the Comet Wild 2 (pronounced ‘vilt’) and, in an aerogel container, captured some bits of the comet’s tail. Aerogel is such a low density material that the cometary particles should be stopped without being destroyed… even with the spacecraft doing 17,000+ mph
In a few years, Stardust will return to Earth with its samples and parachute down to the Utah desert. It will be the first time ever that science has traveled to a comet and brought back samples.
A comet is a great place to visit because it is suspected that they were formed at about the same time as the Solar System. And, since the cometary particles have been protected inside the comet’s icy crust, they should be much the same as they were 4.5 billion years ago!
To me, this is much more exciting than men travelling to space. Because manned space travel is a government project, we’ve become very timid in what we do there. Much of manned spaceflight is a worthless excercise with little scientific purpose. Intelligent machines can do a lot more with a lot less risk.