| 1. | An understanding of the stellar energy sources is still more vital for the problem of stellar evolution .
弄清恒星的能源对恒星演化的研究是更为关键的问题。 |
| 2. | Third, it is important to derive from the observations irrefutable evidence that the earliest phases in the evolution of protostars do occur .
第三个重要任务是要由观测得到不可辩驳的证据来证明原恒星演化中的一些最早期现象确实能发生。 |
| 3. | Nature of the universe - chapter eighteen after studying the evolution of stars , we discuss objects much bigger : galaxies
在讨论过恒星演化之后，我们会讨论一些更大的天体星系。 |
| 4. | This hourglass nebula is the closing phase of a sun - like star s life as its outer layers are ejected
沙漏星云是与太阳相似的恒星演化最后阶段，恒星把外壳喷出，形成行星状星云。 |
| 5. | Frequent space museum visitors should know that neutron star is one of the possible final products of stellar evolution
经常参观太空馆的人该知道，中子星是恒星演化至末期的结果之一。 |
| 6. | Is the most important diagram in discussing stellar evolution . it is a plot of the surface temperature versus the brightness or luminosity of stars
是研究恒星演化最重要的工具，它显示了恒星表面温度和恒星光度的关系。 |
| 7. | The first is stellar - mass black holes , having a mass of a few solar masses as the name indicates . they are the end products of stellar evolution for very massive stars
第一类称为恒星质量黑洞，这类黑洞的质量与太阳质量的量级相若，它们都是巨大恒星演化后的最终物。 |
| 8. | Such a figure caused controversy . the stellar evolution theory states that the oldest globular cluster might have existed for 15 billion years . how could a star be older than the universe
当时曾掀起一场争论，因为从恒星演化理论得知，一些最老的球状星团可能已有150亿年的寿命，怎可能星体比宇宙更年老？ |
| 9. | Within these tight knots of stars , observers in recent years have discovered bodies that are forbidden by the principles of ordinary stellar evolution ? but that are naturally explained as smashed - up stars
在这些紧密的恒星集团内，观测者近年已发现通常的恒星演化理论所不容许存在的恒星，于是很自然将它们解释成撞击而形成的恒星。 |
| 10. | In this area , visitors can select videodisc programmes on stellar evolution and star systems . they can also visualize the spatial relationship between component stars of such famous celestial configurations as the orion and the big dipper
观众可选看关于恒星演化和恒星系统的影碟节目，他们亦可看到著名的猎户座和北斗七星内各星体之间的空间关系。 |
