If you would have picked the minus, you would have found a different phaseAngle, but you can't pick minus.
如果你要取负值,你会找到不同的,相角,但是你不能取负。
3
The images were obtained at a distance of approximately 526,000 miles from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 74 degrees. Image scale is 31 miles per pixel.