The research aims to produce valid information and must use reliable instruments that guarantee accurate and make it quantifiable and possible reproducibility. Allowing the exclusion or at least control prejudice of personal insights and trends that may distort the results.
lunes, 2 de agosto de 2010
Bull's Eye on Mars
Image courtesy NASA/JPL/University of Arizona
Did Martian geology carve this concentric impact crater, or did a second space rock make a bull's eye? Taken July 9 by the HiRISE camera aboard the Mars Reconnaissance Orbiter, the recently released picture shows an impact crater with a slightly off-center pit in its middle.
Mars experts aren't sure whether the pit formed due to erosion of icy and non-icy layers inside the crater or due to a second—and oddly lucky—impact even
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