但是当他们寻找其源头时，却发现那里什么都没有：没有恒星，也没有行星。
But when they looked for the source, there was nothing there, no planet, no star.
于是，太阳，月亮，行星及恒星穿过天空时向西运动。
Therefore, the sun, moon, planets and stars appear to move westward across the sky.
当恒星塌陷时，可以成白矮星，也可以是超新星。
When a star collapses, it can become either a White Dwarf or a Supernova.
当恒星塌陷时，可以成白矮星，也可以是超新星。
When a star collapses, it can become either a White Dwarf or a Supernova.
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