The planets in our solar system don't really revolve in perfectly circular orbits.

太阳系中的行星并不是沿着完美的圆形轨道公转。

The Earth is a planet that goes around the sun in a circular orbit.

地球是一颗以圆形轨道绕太阳运行的行星。

The nearly circular orbit with which eight planets in our solar system revolve has certainly helped them in their quest for survival.

太阳系中八颗行星围绕的近圆形轨道无疑帮助了它们的生存之路。

The team noted that stars with several planets were " most likely to have the kind of circular orbits" that permit them to keep holding liquid water.

该研究小组指出，有多颗行星围绕的恒星“最有可能拥有圆形轨道”，这使得它们能够保存液态水。

After plotting out the path of the spot, he found that it made a circular orbit around Neptune once every 23 hours.

在绘制出该点的路径后，他发现它每 23 小时绕海王星公转一圈。

That represents Earth's axial tilt, which astronomers call its obliquity, relative to the plane of its nearly circular orbit around the sun.

这代表地球相对于其围绕太阳的近圆形轨道平面的轴倾斜，天文学家称之为倾斜角。

For a perfectly circular orbit, the orbiting planet would need to have mass, velocity and distance from the star that precisely matches the gravitational influence of that star.

对于一个完美的圆形轨道来说，环绕恒星运行的行星的质量、速度和距离都需要与恒星的引力影响精确匹配。

In 1913, Niels Bohr came up with a simple model for describing these energy levels for a single electron in hydrogen merely assuming circular orbits.

1913 年，尼尔斯·玻尔提出了一个简单的模型来描述氢中的单个电子的这些能级，仅假设圆形轨道。

Had a supernova taken place, the explosion's force would have pushed the newly formed black hole in a random direction and created an elliptical rather than a circular orbit, Shenar added.

谢纳尔补充说，如果发生了超新星，爆炸的力量会将新形成的黑洞推向一个随机方向，并形成一个椭圆而不是圆形的轨道。

) His idea was that the sun was stationary at the center and that the earth and the planets moved in circular orbits around the sun.

) 他的想法是太阳在中心静止不动，地球和行星围绕太阳运行在圆形轨道上。

An elliptical orbit happens when you throw the rock sideways even harder than it takes for a circular orbit; it goes up higher on one end of the orbit than on the other.

要形成椭圆形轨道，扔出石块的力量要比圆形轨道更大；因为在椭圆轨道一端的物体的位置比圆形轨道更高。

There's something called the -- if I can get wonky for one moment -- the innermost stable circular orbit, that's the innermost orbit at which matter can move around a black hole before it spirals in.

有一种叫做——如果我能动摇一下的话——最内部稳定的圆形轨道，那是物质在黑洞进入黑洞之前绕着黑洞运动的最里面的轨道。

So the question is, is it in a circular orbit around the Sun, like a planet, or is it on its way back in, like one of these typical icy bodies?

所以问题是， 它是像行星一样在围绕太阳的圆形轨道上运行，还是像这些典型的冰体中的一个一样在返回的途中？

He had nothing on which to base his belief in the circular orbits other than the ancient idea that heavenly bodies were round and moved in circles simply because they were 'heavenly.

除了认为天体是圆的并且只是因为它们是“天国”而绕着圆圈运动的古老观念之外，他对圆形轨道的信仰没有任何依据。