"You've done a good job of collecting information," Steve said. "Now it needs breaking down some more. The mixture in the 'color' column bothers me. I have a hunch those colors may be related to the position of the sun. Look."
Rick watched as Steve's forefinger touched a line that showed the color as "dark." The finger moved across the line to the time of day, eleven A.M. Steve pointed to another line where the color was listed as "orange." The time of day was seven fifteen P.M., with an additional note of "twilight."
"Got it," Scotty agreed. "You think the objects may actually be dark, but appear in various colors depending on the position of the sun and the position of the viewer."
"It makes sense," Rick agreed. "All of the colors listed—red, orange, silvery, bright—could be reflections of the sun on a smooth object."
Steve walked to a bookshelf and pulled down a copy of The World Almanac. "Sunrise and sunset times are listed in here. You can figure out quickly enough where the sun was in relation to the observer. It will take another sheet of paper and some more columns."
"You gave us an extra sheet," Rick replied. "How should I head the columns?"
Steve thought for a moment. "Three columns for the position of the sun. Rising, high, setting. Four columns for the position of the observer in relation to the flying object—north, south, east, or west. One column for color, and one for other comments such as 'shiny.' And, of course, you want a column for the time."
Rick recorded the data as Scotty read it off, checking The World Almanac for the sun's approximate positions. Steve was obviously interested. He started to read his report again, then abandoned it and came back to the table where the boys were working.
When the data had been transferred, the three studied it. Rick ran his eye down the columns quickly, getting an impression, then he went over the data slowly. "You're right, Steve," he said finally. "It all tallies, even at a quick look. In every case where the object looked colored, the observer saw the sun striking it. Where it looked dark, the object was between the observer and the sun. Or, at least, the observer wasn't in a position to see the sun reflect off the object."
Scotty added, "In every case where the object looked red or orange, the sun was setting or had already set. In every case marked 'bright,' 'silvery,' or 'shiny,' the sun was high and the observer could see the sun reflecting from the object."