This is not the star's disk you are seeing but the effect of having a circular aperture in your telescope and due to the nature of light.
这不是星星自身的光环，而是由于望远镜的圆形孔径光阑以及光的物理特性造成的。
The image from the Hubble Space Telescope is a spectacular visual reminder of just how thin disk galaxies can be.
这张哈勃太空望远镜拍摄的照片让我们震撼于这个星系的平整度。
A fundamental limit is imposed by the size of the diffraction disk of the telescope.
一个基本的极限是由望远镜衍射园面的大小决定的。
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