Showing posts with label robots. Show all posts
Showing posts with label robots. Show all posts

Thursday, August 9, 2012

Color Mars Panorama and Meteor Shower Saturday Night


The first color panorama looking around the landing site has been taken by the cameras on the mast of the Curiosity rover.  In the picture, we are seeing a late afternoon scene, with the dramatic shadow of the rover, the reddish martian sand, and the grey splotches made where the rocket exhaust disturbed the ground.  The set of stitched-together images shows the scene 360 degrees around the rover; as if we were right there with Curiosity. I love it.  Even better images are going to be taken, but this first look around is what the scientists have been waiting for to get their bearings.
See: http://www.nasa.gov/mission_pages/msl/multimedia/pia16029.html
for the version with NASA's caption.

Coming back down to Earth, this Saturday night and Sunday morning are the peak of the Perseid (pronounced Purr--see--ud) meteor shower for 2012.  What that means in English is that, if you go outside and away from city lights after about 11 pm Saturday evening or early Sunday morning, you will see more shooting stars than usual.  If you are patient, allow your eyes to get adapted to the dark, and find a spot where you have a good view of the whole sky, you should be rewarded -- over time -- with a good number of chunks of cosmic material burning up in our planet's atmosphere.

The chunks in this "shooting star" shower are left over from an old comet called Swift-Tuttle, which has passed our way many times over the eons, and left a lot of dust in its wake.  When the Earth intersects that stream of dust and dirt, we get a shooting star each time a piece burns up by air friction.

I recommend viewing the shower with someone with who you enjoy spending time in the dark.

For more, see the nice article from Sky & Telescope magazine at: http://www.skyandtelescope.com/about/pressreleases/Perseid-Meteors-in-Their-Prime-165482256.html

Thursday, August 2, 2012

Seven Minutes of Terror: Curiosity Rover to Land on Mars


If all goes well, and keep all your fingers crossed that it does, the most complex laboratory ever sent to another world will land on Mars next Sunday night. The Curiosity Mars Rover is slated for Ma
rs touchdown Sunday, August 5, at 10:31 PM Pacific time, in a never-before-tried rocket-powered sky-crane landing. To see, what's involved and why NASA's Mars scientists all have their nails bitten down to the fingertips, check out the video about the "Seven Minutes of Terror" after the craft reaches the top of Mars; thin atmosphere:

http://www.youtube.com/watch?v=Ki_Af_o9Q9s

 

 

 

Here is a great image from the Jet Propulsion Laboratory, which builds and manages so many of our robot probes to the planets. This show the three generations of Mars rovers, the little Sojourner at the front left, S
pirit/Opportunity to the left of the two technicians, and then big Curiosity (the one that we hope to land on Sunday) on the right. NASA says if Spirit and Opportunity were golf carts, then Curiosity is a car. It has 10 science instruments, weighs almost one ton, and requires too much power to use solar cells (as the previous generations of rovers did). It has a generator powered by radioactive plutonium dioxide on board. 

Among its tools is a microscope that can see things as small as the width of a human hair! And the microscope tool carries a small light so it can do night work. Its laser can vaporize rocks up to 23 feet away, and "smell" what they are made of from the vapor. Since (at the time of the landing) messages from Earth will take 14 minutes to get to Mars, the rover has artificial intelligence software for making any immediate decisions that are required. The question is, is Curiosity smarter than your little brother?