恒星的质量会影响其表面温度。
恒星的颜色取决于它的表面温度。
所有的恒星的重力都与其压力相平衡。
分析：黑洞的形成暗示了恒星的死亡。
ANALYSIS: Intermediate Black Hole Implicated in Star's Death.
恒星的亮度取决于它的表面温度和大小。
The brightness of a star depends on its surface temperature and size.
恒星的大小影响它的亮度。
通常恒星的质量越大，它的寿命就越短。
The greater a star's mass, the shorter its lifespan generally is.
然而直接探测其它恒星的磁场是很困难的。
Directly detecting the magnetic fields of other stars, however, can be difficult.
这些恒星的年龄大约从1百万到1千万年。
热恒星的紫外辐射使星云发光。
Ultraviolet radiation from the hot star powers the nebular glow.
天文学家能够测定每颗恒星的亮度。
距离以光年计算的恒星的距离。
恒星的辐射将是无法节制的。
爆炸也许把恒星的一半质量掷到空间。
The explosion flings out perhaps half the star's mass into space.
其他恒星的光到达地球需要很长时间。
It take a long time for light from the stars to come to Earth.
欢迎来地球，一颗被称作太阳的恒星的第三颗行星。
Welcome to planet Earth, the third planet from a star named the Sun.
整个系统是氢气，其恒星的东西丰富了。
The entire system is rich in hydrogen gas, the stuff of which stars are made.
这项发现还能帮助天文学家弄清楚恒星的进化和死亡。
The discovery also could help astronomers understand star evolution and death.
这幅艺术想象图表现了一颗围绕着冷却恒星的年青行星。
This artist's conception shows a hypothetical young planet around a cool star.
这两张照交替显示，你可以看出这颗爆炸的恒星的位置。
The images are blinked to show the location of the exploded star.
天文学家们确定了银河系中最大恒星的质量。
Astronomers have confirmed the weight of the most massive star in the galaxy.
恒星的自转，是恒星结构和演化理论的难点。
Stellar rotation is a difficult problem of the theory of stellar structure and evolution.
科学家说这颗行星与其主恒星的距离适中，可能存在水分。
Scientists say the planet's distance from its primary star means it may contain water.
如果该恒星的旋转加快仅仅20%，那么离心力就会其撕裂。
If the star spun just 20% faster, the centrifugal force would fling it apart.
要弄懂普通恒星的质量为什么要受到限制并不难。
It is not hard to see why normal stars should be limited in mass.
要弄懂普通恒星的质量为什么要受到限制并不难。
It is not hard to see why normal stars should be limited in mass.
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