Silent light craft moves across sky with steady brightness until it vanishes into thin air in 2 secs.

I was texting when I looked up and seen a VERY bright light coming across the sky.  I watched it a few seconds as it silently came across the sky from the North heading Southeast, it's light steady...never blinking.  I thought it was strange so I quickly finished my text and looked up.  A couple seconds after looking up it got dimmer, and within 2 secs, literally, it was completely gone....vanishing into thin air.