终结者的月亮
(原标题: Terminator Moon)
2022-02-15
浏览次数: 16
这个月球有什么不同？是终结者。在这张特色图片中，你无法直接看到任何明暗分界线——白昼与黑夜的分界线。这是因为这张照片是由29条接近终点的月球带组成的数字合成图。终结者区域显示了最长和最突出的阴影——阴影，通过它们的对比度和长度，使平面照片看起来像三维的。原始图像和数据是由美国宇航局的月球勘测轨道器在月球附近拍摄的。月球上的许多环形山都很突出，因为它们都向右投下阴影。这幅图像以图形的细节显示，被称为玛丽亚的较暗的区域不仅比月球的其他部分更暗，而且更平坦。拨月：找出你生日那天月亮的相位。
查看原文解释
What's different about this Moon? It's the terminators. In the featured image, you can't directly see any terminator -- the line that divides the light of day from the dark of night. That's because the image is a digital composite of 29 near-terminator lunar strips. Terminator regions show the longest and most prominent shadows -- shadows which, by their contrast and length, allow a flat photograph to appear three-dimensional. The original images and data were taken near the Moon by NASA's Lunar Reconnaissance Orbiter. Many of the Moon's craters stand out because of the shadows they all cast to the right. The image shows in graphic detail that the darker regions known as maria are not just darker than the rest of the Moon -- they are flatter. Dial-A-Moon: Find the phase of the Moon on your birthday.