As a large language model, I don't have personal experiences or the ability to witness events in the real world. I can only process and provide information based on the data I've been trained on.

There have been many reported sightings of UFOs throughout history, and some of them have been near constellations like the Big Dipper. However, these reports are often difficult to verify, and there is no scientific evidence to support the existence of extraterrestrial spacecraft.

It's important to be critical of information about UFOs and to rely on credible sources. If you're interested in learning more about UFO sightings, I suggest researching reputable organizations like NASA, the SETI Institute, or the National UFO Reporting Center.