Dawn on Charlotte Talks, My NPR Interview

Curiosity's hand print in the soil of a wheel scuff.  The imprint is from the APXS instrument, which measured the elements (e.g. Si, Al, Mg, Fe, etc.) in the soil.

Earlier this week, I had the privilege of going to the annual Geological Society of America meeting in Charlotte, NC.  I presented our preliminary geological map of the Curiosity landing area in Gale Crater, Mars.

Thanks to Justin Samuel, of GSA, I was invited to record an hour-long NPR show with Mike Collins of Charlotte Talks.  It was great fun!  Here's the link: Mars Rover

Joy Cooke already posted a comment on the show asking if I encourage young students to pursue science (Thanks Joy!) - I do, but informally.  I try to share my experiences, but right now, I am almost entirely focused on making sure we use the rover for the best scientific purpose possible.  It's such a capable - and complicated - rover, that we have to have people dedicated to making all of the daily decisions on what to do - down to planning seconds, looking for swapped numbers, making tough choices about what to throw out of plans, etc.

For example, if a command has an error, it can put an instrument in an unsafe state. We then have to evaluate

1. what happened, 
2. whether or not any damage was done, 
3. which data stored on Curiosity we need to request to diagnose the problem,
4. how to fix the problem, 
5. how to make up for the things Curiosity didn't do because of the error,
6. how to change all the commands we were prepared to send to the rover (and make sure there aren't any new errors!)
7. how to change the plan for the next day, 
8. how to prepare for the Thanksgiving weekend (when most people actually get a holiday), and
9. how to keep the problem from happening again

Yesterday, I worked over 12 hours on planning for the next few days plus Thanksgiving observations, and I wasn't the only one!  There were dozens of us.  

Eventually, we get to actually look at the amazingly cool data and learn something about Mars.  Often, the public has more time to look at the beautiful images than the people on the team!  I hope that all people of all ages can enjoy the sense of exploration, adventure, and discovery provided by the Curiosity rover!  It is an amazing international collaboration that people across the world can and should be proud of!

Quad 51: Yellowknife

I had a bit of fun yesterday...  I participated in a JPL press conference, and I was supposed to describe our mapping work on the team, which I've been co-chairing with John Grant. Fred Calef is doing all the hard work.  This effort has been going on for about a month before landing.  We solicited volunteers from the science team to each map a 1.3x1.3 km quad in or near the landing ellipse.  The volunteers submitted their maps, and we've been integrating them into a single map.  In our mission work, we are refining our efforts and developing models for how the different rock types formed.  It's been an amazingly fun project.

In addition to describing the mapping effort, I was going to announce the name of the quad we landed in - it happened to be one of the ones I mapped.  However, at the last minute, we decided to postpone the announcement.  Thus, I talked about Quad 51.  No one on the team had noticed - or at least said anything - about this coincidence.  Immediately, the press, however, picked up on "Area 51".  We landed in Area 51!  Total coincidence!

The name Yellowknife was announced after the press conference.  That now has people running around explaining why we chose Yellowknife, which I had planned to do in the press conference!  So here's a bit about why:

For the Geologists:  The Yellowknife Supergroup consists of rocks that are about 2.7 billion years old.  They form a greenstone belt (Sasha and the UCD Geology Club - they include one schist, two schist, green schist, but no blue schist.) that overlies the oldest rocks in the world, the 4.98 billion year old Acasta Gneiss.

For the Historians and Geologists, who are after all, historians of the earth:  Yellowknife is the largest town in the Northwest Territories with a population of a little less than 20,000 people.  It is named after the Yellowknife Dene who live in the area and used to make knives out of copper.  In the 1930's, Yellowknife was a gold and uranium boom town, and in the 1990's it was the center of a diamond rush.  Many geologists and arctic explorers go through Yellowknife on their way north.  Thus, the town holds many interesting memories for a number of people on the team, including John Grotzinger, the Project Scientist, who is the one who chose the name.

Congratulations to Yellowknife!

Back to the topic of Area 51: The team loves it, as do the engineers.  In today's press conference, one of them talked about all the strange things that happened in Quad 51.  It couldn't have been better!