Where is the rest of the circle? Jupiter [
http://www.seds.org… ]'s largest moon Ganymede [
http://bang.lanl.go… ] has some truly unusual terrain, including the pictured half circle above [
http://galileo.ivv.… ] cut by nearly parallel curves. Full circles can be easily explained by impact craters [
http://antwrp.gsfc.… ], but partial circles imply that some resurfacing [
http://galileo.ivv.… ] has occurred since the original impact. The diameter of the half circle is about 32 kilometers. Also of interest is a dense linear crater chain [
http://antwrp.gsfc.… ] that cuts across the top of the half-circle. Mysteries like these are typically solved by the hard work of reconstructing a sequence of natural occurrences, which in this case may yield a better understanding of Ganymede [
http://galileo.ivv.… ]'s interesting past.
explanation
Where is the rest of the circle? Jupiter [ http://www.seds.org/nineplanets/nineplanets/jupiter.html ]'s largest moon Ganymede [ http://bang.lanl.gov/solarsys/ganymede.htm ] has some truly unusual terrain, including the pictured half circle above [ http://galileo.ivv.nasa.gov/ganymede/PIA01087.html ] cut by nearly parallel curves. Full circles can be easily explained by impact craters [ http://antwrp.gsfc.nasa.gov/apod/ap971117.html ], but partial circles imply that some resurfacing [ http://galileo.ivv.nasa.gov/ganymede/PIA01089.html ] has occurred since the original impact. The diameter of the half circle is about 32 kilometers. Also of interest is a dense linear crater chain [ http://antwrp.gsfc.nasa.gov/apod/ap950715.html ] that cuts across the top of the half-circle. Mysteries like these are typically solved by the hard work of reconstructing a sequence of natural occurrences, which in this case may yield a better understanding of Ganymede [ http://galileo.ivv.nasa.gov/ganymede/ ]'s interesting past.
Explanation
false