If found in our own solar system its diameter would almost encompass the orbit of Jupiter.
如果把它放到我们的太阳系中，参宿四的直径几乎可以环绕木星轨道一周。
From knowing the diameter of the Earth's orbit and the apparent angular movement of the star, we can calculate the distance to it.
在知道了地球轨道的直径和恒星变化的角度，我们就能计算出它的距离。
Both nebulae are remarkably symmetric, round, and similar in size, some 2 light-years across or about 2, 000 times the diameter of Neptune's orbit.
两个星云均圆形、对称，而且大小相仿，直径约2光年或约为海王星轨道的2000倍。
When testing different diameter pipeline or vessel, the orbit module is changed only.
检测不同管径的管道时，仅需更换轨道模块。
When the aperture diameter of an optical system is fixed with the same orbit height, the resolution of ground objects can be improved by increasing the focal length.
当光学系统口径一定时，在相同的轨道高度条件下，增大焦距可以提高地面分辨率，增大系统的视场角可以扩大对地面的覆盖宽度。
When the aperture diameter of an optical system is fixed with the same orbit height, the resolution of ground objects can be improved by increasing the focal length.
当光学系统口径一定时，在相同的轨道高度条件下，增大焦距可以提高地面分辨率，增大系统的视场角可以扩大对地面的覆盖宽度。
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