In an interview with The Morning Call, Patch reader and Emmaus resident explains how twice he saw a big, black triangular object in the sky, at night, that blocked out the stars.

One of those objects, Royer says, appeared over in 2003. Those experiences got him interested in UFOs, and his research led him to become a volunteer field investigator for the Mutual UFO Network, called MUFON.

Royer, 65, retired as a drafting instructor from Lincoln Technical Institute, and is a graduate of Lafayette College. Now he investigates dozens of sightings throughout the Lehigh Valley, most of which, he says, are mistakes. Royer makes no judgment about what he or others think the saw, but in the interview he says, 'I believe there is something flying around out there that we don't know about.'

Read the complete story in The Morning Call. What about you? Have you ever seen a UFO? When, what did you see? Let us know.

In the mean time, according to MUFON, if you have a close encounter in the future, here are 10 things you should do:

1. REMAIN CALM, but protect yourself from any hazards real or perceived.

2. Be objective. Not every UFO is extraterrestrial. 3. Use a camcorder or camera to record the event.