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cover of episode Why is the moon white and why does it have different shapes?

Why is the moon white and why does it have different shapes?

2025/5/12
logo of podcast Moment of Um

Moment of Um

AI Deep Dive Transcript
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Preston Dykes
S
Shayla Farzan
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Preston Dykes: 月亮之所以看起来是白色或明亮的,是因为它反射了太阳光。虽然月球表面实际上是深灰色的,但在黑暗的太空中,阳光照射到月球上并反射到地球,使得我们看到的是被太阳照亮的明亮月亮。月亮看起来有不同的形状,是因为我们看到的是被太阳照亮的月亮的不同部分。月亮围绕地球旋转,随着它的移动,我们看到被太阳照亮的不同侧面。当我们看到一个大圆月亮时,是整个面向我们的月亮的一面都被太阳照亮了。当我们只看到一弯新月或半个月亮时,是因为月亮被太阳照亮的一面并没有完全面向我们。月亮一直都是一个圆球,但我们看到的被太阳照亮的部分在变化,这就是月相。 Shayla Farzan: 月亮近看是灰色的,但由于它反射了大量的阳光,所以对我们来说看起来是亮白色的。阳光在月球表面的照射位置会改变月亮在我们眼中呈现的形状。我们总是看到月亮的同一面。当太阳直接照射在月球上时,我们看到一个大而明亮的满月。但是,当太阳主要照射在月球的我们看不到的那部分时,月亮看起来就像一个弯曲的字母C。

Deep Dive

Shownotes Transcript

Some planets have lots of moons. Others have none. Earth has just one moon, but it’s a really great one. It can glow bright and white and sometimes it’s shaped like a big round ball. Other times it’s skinny like the white tip of a fingernail. Makes you wonder, why does the moon look the way it does? We asked Preston Dyches from NASA’s Jet Propulsion Laboratory to help us find the answer.

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