What are you using? A smartphone, an entry-level point-and-shoot, a mid-range mirrorless, a professional DSLR? This is the most important question. The next most important question is: are you using a tripod?
The moon moves and your hands shake, so using a tripod will make your shots a lot better.
If you have a camera with manual settings control, general consensus on appropriate settings will be ISO 100, aperture in the range of f/8-f/11, and shutter speed of around 1/100-1/150.
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