UFO's or satellites

I see these quite often. I will look up in the sky on a clear night and see what appears to be a small point of light moving across the sky. The speed is faster than a jet/helicopter and Im assuming satellites as well. Respectivly to how high it is its much faster than a plane. I dont here a sound coming from these, however it could be due to there high altitude. I doubt jets fly this high as well. If you watch an ant walk across the ground that would be a relativly close comparison to how fast these things move across the sky. Probably satellite, but thought Id check with you guys first.

Regards

Yep, they sound like satellites. To be sure, you can check Heavens-Above.com.

You plug in your location and the site tells you the time of anything orbiting that's visible from your location, including magnitude and star chart of the track. It's also good for locating Iridium Flares for explaining the lights that flash and then seem to vanish.