Astronomy Picture of the Day . ... 4.10.2009 . ... The above illusion , called the same color illusion , illustrates that purely human observations in science may be ambiguous or inaccurate. ... The advent of automated, reproducible, measuring devices such as CCDs have made science in general and astronomy in particular less prone to, but not free of, human-biased illusions . ... October . ... NASA Web Site Statements, Warnings, and Disclaimers . ... U. Based on Astronomy Picture Of the Day ...