First let me mention..I have absolutely no knowledge of this subject, and I don't by any means think that I saw a ufo or anything like that, but, I was looking out my window, there is a large field across the street from my house. I noticed a falling star that lasted longer than the average falling star. Usually when I see them...I go to focus on them, and they are gone. This time, I actually got to stand there for a second and take it in. It was a bright falling star, and as it came down, there was a tail, and in those few seconds, I thought it was never going to burn out! Then...i swear Im not crazy, but, it turned green just before it went out...not just "maybe green" it was GREEN! Why would that happen? Also, it seemed like it got closer to the horizon before it finally burned out. The things that got me are how bright it was, how long it lasted, how low it was before it burned out (i was half expecting to see an explosion of where it landed for a second!), and the green! It went down at an angle, just like I would expect. It didnt hover or do any tricks...except the whole green thing! Why would that happen?