You Know You're an SF Writer When...

[lagilman]

You go to

http://antwrp.gsfc.nasa.gov/apod/ap040318.html

and follow their suggestion to scroll along the full pan...

and with every newly revealed screen, some part of you is imagining your reaction if suddenly there was an alien figure staring back/coming over the ridge/loading up a weapon and screaming "you stupid kids, get off my lawn!"