BBC Sky at Night

Reduce star trailing in your astro images

Astrophotography is an extremely rewarding aspect of astronomy, but as any astro imager will know, conditions often aren't in our favour, which is why we have to take advantage of those rare clear nights whenever they come around. It can be disappointing, then, after capturing those precious images, to discover that they suffer from star trailing.

Slightly trailed stars can be caused by a misbalanced mount or one not quite correctly aligned with the

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