HERALD reader Mark Grant was taking photographs of the night sky over Worthing, when a mystery light trail appeard in one of the images.
The photograph was one of many taken in the early hours of Thursday, October 23, but the only one with a light trail.
Mr Grant said: "To me it looks like some kind of light trail from a moving object, like it's speeded up."
Click here to see a larger version of the image.
The camera lense was open for approximately 30 seconds due to the darkness.
After searching the internet for Worthing UFOs Mr Grant spotted a similar photograph taken in June.
What do you think the light trail might have been?
Let the Herald know, email your views to email@example.com or comment in the space below.
Click here to go back to Worthing news.
Where are you? Add your pin to the Herald's international readers' map by clicking here.
Email the Herald: firstname.lastname@example.org
Click here for the Herald staff directory.
Want to read this page in French, German, Spanish, Portuguese, Urdu or 48 other languages? click here for Google translate.