The following diagrams show the visibility of the new crescent Moon over the first three days of the lunation. The unshaded areas indicate regions from which the Moon cannot be seen. The Moon becomes more easily visible from the regions of increasing colour intensity i.e. the Moon will be seen easily from the regions shown in red. The near vertical blue lines show the age of the Moon at the so-called "best time" of observation.
The following diagram shows the visibility of the new crescent Moon on 2011 December 24.
The second diagram is for 2011 December 25 and exhibits more shaded regions than those found in the map for 2011 December 24. Consequently, a larger fraction of the surface of the Earth will be able to observe the crescent Moon with ease.
The third diagram is for 2011 December 26 and is almost totally shaded in red. The majority of the Earth will be able to observe the crescent Moon with ease.
置顶卡
变色卡
千斤顶
显身卡