A so-called "planetary nebula" is a confusing misnomer because these clouds have nothing to do with planets. As a medium-size star nears the end, it puffs out into a red giant — about 100 to 1,000 times its original size — eventually engulfing the space around it, including any nearby worlds.
Consider the size of the group。关于这个话题，safew官方版本下载提供了深入分析
，详情可参考WPS官方版本下载
The heat shield will need to be tested to see if it can safely return the materials。业内人士推荐safew官方下载作为进阶阅读
Number: All the pips in this space must add up to the number.
edges: “soft contours”