If you like to watch interesting things flying by overhead, you might be interested in looking for the International Space Station. When it’s zooming past your area, it’s usually the third brightest object in the sky. But how do you know when to look? You can sign up for notifications for when the ISS is passing over your location at http://spotthestation.nasa.gov/.
Obviously, you won’t be able to see it every time it passes because sometimes it is blocked by clouds and sometimes the transit is too low or fast to catch. Since the skies in Athens are clear tonight, I’ll be outside at 10:49 pm looking up to see the ISS pass overhead.
Here are a few pictures I found of the ISS passage from the Earth’s surface on Commons Wikimedia:
See the original at http://commons.wikimedia.org/wiki/File:2011-08-13_22-31-35-moonlight.jpg for a better view of the ISS trail.