First, a telescope brings starlight falling over a large area to a small area . To get at this small area, however, one must go inside a reflecting telescope , and one good way to do this is to use support rods, which are right in the view of the telescope . The wave nature of light causes it to deflect when passing near these rods. These annoying spikes steal precious light from the central image and hide light from fainter, more interesting stars. Apparently, that half-circle is a new stellar system forming in the Lagoon Nebula .
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