I see what looks like faint stars moving through the sky at night, (Arizona) they seem to be moving at amazing speeds though i cant tell how far away they are, no one else in my family can see them except my younger brother, (we both have 20/20 vision, everyone else has poor vision} so they are hard to see with the naked eye for most people, but they have no tail and they don't flash but they go all the way across the sky in less than 2 or 3 minutes and they look just like stars, I can spot them with Peripheral vision by staring at any other star, anybody know what they are?