The ISS, or International Space Station, is very easy to see from the surface of the Earth using just the Mark I Eyeball, providing you know where to look, and depending on whether or not you will have clear sky’s for viewing. There are a number of resources available for knowing where to look; the one embedded here is from the folks at SatFlare, who do a great job with online satellite and flare tracking. Another favorite is the one at I.S.S. Tracker, and of course Heavens-Above has a 2D tracker, the 3D tracker I linked here, and an app you can download to your phone or tablet. I rather enjoy watching the ISS hurtling overhead, knowing that someone might be looking back at us; you should try it sometime and see if you don’t agree.