什么是偏心率?
Discovering New Worlds (Planets & Orbits 5E) - Chinese Edition

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Science
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9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
偏心率是描述轨道形状的一个参数,表示轨道的椭圆程度。偏心率的值在0到1之间,0表示圆形轨道,接近1表示高度椭圆形轨道。
2.
FLASHCARD QUESTION
Front
行星的轨道偏心率如何影响其运动?
Back
偏心率越大,行星在轨道上离太阳的距离变化越大,导致行星在轨道上运动速度的变化也更明显。
3.
FLASHCARD QUESTION
Front
行星离太阳越远,公转周期如何变化?
Back
行星离太阳越远,绕太阳公转所需的时间越多。
4.
FLASHCARD QUESTION
Front
恒星的大小与其寿命之间的关系是什么?
Back
恒星越大,寿命越短;恒星越小,寿命越长。
5.
FLASHCARD QUESTION
Front
第一行星运动定律是什么?
Back
第一行星运动定律表明,行星沿椭圆形轨道围绕太阳运动,太阳位于椭圆的一个焦点上。
6.
FLASHCARD QUESTION
Front
什么是万有引力定律?
Back
万有引力定律描述了两个物体之间的引力与它们的质量成正比,与它们之间的距离的平方成反比。
7.
FLASHCARD QUESTION
Front
如何计算轨道的偏心率?
Back
偏心率(e)可以通过公式 e = (a - b) / a 计算,其中 a 是长轴,b 是短轴。
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