Click and Ye Shall Identify (Martian Craters)
Explore Mars by clicking on Martian craters at NASA's
web site for Clickworkers
and make circularities on rims of craters. You have an
interactive training session that lets you know how well
you are doing. Then you can graduate to the real thing.
You will be presented with images from the Viking
Orbiter. The site keeps track of how many craters you
have done. If you are more venturesome, you can go for
the new images of Mars from the current mission, Mars
The NASA clickworkers site is an experiment in public
involvement for doing routine scientific work that
require months of a scientist's time. So far, since
November 17, 2000, clickworkers have done 679,824 crater
markings and 138,263 crater classifications.
I have done some clicking. I find that for the smaller
craters approaching the size limit they show on the
screen, a magnification aid is helpful. The Opera 5.0
browser has magnification of the browser screen by means
of a drop-down box selection in the upper right.
I have made use of screen magnifiers from Magnifiers.org
where can be found freeware and shareware for
perusal. Magnification, in some cases can go to 32X. I
find that 2 to 3X is plenty. Some magnify wherever the
mouse goes. Some also impose a grid on your view.
You can click away for a few minutes or longer. Their
server is sometimes slow. Give it a go.