Orbits
Orbits
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轨道
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
D. Wittman
中科院分区：
文献类型：
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作者：
D. Wittman
轨道在宇宙中无处不在：卫星绕行星运行，行星绕恒星运行，恒星绕银河系中心运行，等等。任何引力理论都必须解释所有这些轨道的性质。为了为发展公制引力理论（广义相对论）铺平道路，本章考察了牛顿引力模型所观测和解释的轨道基础。我们可以利用我们对引力的理解来推断这些宇宙系统的质量和其他特性。这一章以四个可选的部分结束，以这种精神，涵盖弹弓演习；暗物质;双星轨道以及它们如何揭示恒星的质量；以及太阳系外行星。
Orbits are ubiquitous in the universe: moons orbit planets, planets orbit stars, stars orbit around the center of the Milky Way galaxy, and so on. Any theory of gravity will have to explain the properties of all these orbits. To pave the way for developing the metric theory of gravity (general relativity) this chapter examines the basics of orbits as observed and as explained by the Newtonian model of gravity. We can use our understanding of gravity to infer the masses and other properties of these cosmic systems. Te chapter concludes with four optional sections in this spirit, covering the slingshot maneuver; dark matter; binary star orbits and how they reveal the masses of stars; and extrasolar planets.