How old are the satellite images of Google Earth?

Does anyone use Google Earth? I just downloaded and am wondering how old the pictures are. I saw my old high school and definitely know the pictures of my school are 3.5 years at their oldest (from the renovation of and addition of huge buildings), but I looked at pictures of my house and I can definitely tell its older than 3.5 years. So how old are the newest pictures and is it possible to see live streaming satellite photos?|||maybe five or more years|||it is SOOOOO ******* old i dont kno how old but ik its like....five years or more lol