| 1. | Many objections can be raised to this picture of planetary nebula formation . 形成行星状星云的这一图像可能会引起许多异议。 |
| 2. | Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry . 行星状星云是一类孤立的气体星云,具有相当程度的双侧对称性。 |
| 3. | M2 - 9 is a typical butterfly shaped planetary nebula M2 - 9是蝴蝶状行星状星云 |
| 4. | Some others were taken by the hubble space telescope . courtesy k . m 以下的行星状星云则是哈勃太空望远镜的杰作。 |
| 5. | Planetary nebulae are not as airy and tranquil as their images suggest 行星状星云并不如影像中所显现的那麽飘逸宁静。 |
| 6. | Bipolar planetary nebula 双极行星状星云 |
| 7. | The spectacular planetary nebula helix nebula is the death of a star disguised as a butterfly 色彩斑斓的行星状星云螺旋星云,正是恒星死亡所化身的蝴蝶。 |
| 8. | Since then , the picture has steadily gotten far more complicated ? and far more interesting 从那时起,行星状星云的图像就渐渐变得非常复杂,并且饶富趣味。 |
| 9. | " butterflies in the starry sky " will present these beautiful planetary nebulae and their evolution 将会介绍这些美丽的行星状星云,与及它们的形成和演化过程。 |
| 10. | It will evolve into a cosmic butterfly - a spectacular planetary nebula in the starry sky 不过,太阳的死亡绝不平淡,它会化为星空蝴蝶成为夜空中灿烂的行星状星云。 |