3.5地球自转
Section outline
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What kind of revolution are we talking about?
::我们谈论的是什么样的革命?Copernicus caused a revolution . He said that Earth revolved around the . With his telescope, Galileo found a lot of evidence for this. He could see moons orbiting . If moons can orbit Jupiter, surely Earth can orbit the Sun. Yes? In the two images above, you can see Jupiter at two different times, showing moons in different places.
::哥白尼引发了一场革命。 他说地球围绕环绕着它。 伽利略在他的望远镜中发现了许多证据。 他可以看到卫星在轨道上运行。 如果卫星可以绕着木星运行, 地球肯定可以绕着太阳运行。 是的 。 在上面的两张图中, 您可以两次看到木星, 在不同的地方显示月亮 。Earth's Revolution
::地球革命Earth orbits a star . That star is our Sun. One revolution around the Sun takes 365.24 days. That is equal to one year . Earth stays in orbit around the Sun because of the Sun's gravity ( Figure ).
::地球围绕一颗恒星运行。 那颗恒星是我们的太阳。 围绕太阳的一场革命需要365.24天。 这相当于一年。 地球由于太阳的引力而停留在围绕太阳的轨道上( 图 ) 。Earth's orbit is not a circle. It is a bit elliptical. So as we travel around the Sun, sometimes we are a little farther away from the Sun. Sometimes we are closer to the Sun.
::地球轨道不是一个圆圈。 它有点椭圆。 当我们环绕太阳旅行时, 有时我们距离太阳更远一点。 有时我们距离太阳更近一些。 有时我们距离太阳更近一些。Students sometimes think the slightly oval shape of our orbit causes Earth's . That's not true! The seasons are due to the tilt of Earth’s axis , as discussed in the previous concept.
::学生们有时会认为我们轨道的微小oval形状导致地球。这不是真的!季节是由地球轴的倾斜造成的,正如前一个概念所讨论的那样。Earth and the other planets in the solar system make elliptical orbits around the Sun. The ellipses in this image are highly exaggerated.
::太阳系中的地球和其他行星形成太阳周围的椭圆轨道。这种图像中的椭圆是高度夸大了的。The distance between the Earth and the Sun is about 93 million miles, or 150 million kilometers. Earth revolves around the Sun at an average speed of about 27 kilometers (17 miles) per second. Mercury and are closer to the Sun, so they take shorter times to make one orbit. Mercury takes only about 88 Earth days to make one trip around the Sun. All of the other planets take longer amounts of time. The exact amount depends on the planet's distance from the Sun. takes more than 29 Earth years to make one revolution around the Sun. How old would you be if you were on Jupiter?
::地球与太阳之间的距离约为9300万英里,或1.5亿公里。地球围绕太阳旋转的平均速度为每秒27公里(17英里)左右。 汞与太阳相距较近, 因此它们需要更短的时间才能形成一个轨道。 汞只需要大约88个地球日就可以绕太阳出行一次。 所有其它行星需要更长的时间。 确切的数量取决于行星与太阳的距离。 需要超过29个地球年的时间才能在太阳周围进行一次革命。 如果你在木星上, 你会多大?Summary
::摘要- Earth's orbit around the Sun is somewhat elliptical.
::太阳周围的地球轨道有点椭圆
- Earth's seasons are not caused by the shape of its orbit.
::地球的季节不是由轨道的形状引起的。
- Earth and the other planets of the solar system revolve around the Sun.
::太阳系的地球和其他行星环绕太阳。
Review
::回顾- How long does it take for Earth to make one revolution around the Sun?
::地球在太阳周围进行一场革命需要多久?
- Is Earth farther from the Sun in the winter and closer in the summer? Explain.
::地球在冬天离太阳更远,夏天更近吗?解释一下。
- Describe Earth’s orbit around the Sun. Describe the orbits of the other planets.
::描述地球围绕太阳的轨道,描述其他行星的轨道。
Explore More
::探索更多Use this resource to answer the questions that follow.
::使用此资源回答下面的问题 。- What did Aristotle and Ptolemy say about the relationship of Earth to other celestial bodies?
::亚里士多德和托勒米对地球与其他天体的关系说了什么?
- In what ways did planets not fit their ideas?
::行星以什么方式不符合其想法?
- Why was the geocentric model a hypothesis that needed to be thrown out?
::为什么地心模型 是一个需要被抛弃的假设呢?
- What did Copernicus say about the solar system? What was the heliocentric model?
::哥白尼对太阳系怎么说?
- Why was Copernicus’ model wrong?
::为什么哥白尼的模式是错误的?
- What was Kepler’s innovation?
::开普勒的创新是什么?
- What contributions did Galileo’s telescope make to accepting the Copernicus/Keppler model of the solar system?
::伽利略望远镜对接受太阳系的哥白尼/基普勒模型有何贡献?
- What did The Church do with the heliocentric model?
::教会对日光中心模型做了什么?
- What is wrong with the heliocentric model?
::日光心模型有什么问题?
- Why do we know that the geocentric model is wrong today?
::为什么我们知道地心模型今天错了?
- Earth's orbit around the Sun is somewhat elliptical.
