Salem Orb Ghost Picture

Patti sent us this great, green orb captured above an old grave marker in Salem, Massachusetts:

"I took this photo in a cemetary in Salem Massachussettes in August '07. My son and I went to the cemetery around 9:00 pm and took many pictures of the tombs. I noticed a green orb above a tombstone...I wasn't able to find anything near or around the tomb (that would have caused it). I had other spots on different photos, but felt they were probably dust specks. My son also took a photo of the same tomb and it showed a white orb. I felt that this photo was really unexplainable."