The ISS is circling the globe roughly every 90 minutes. You will know it when you see it. It is very bright as it crosses the sky at a great rate and is always white in colour.
Heavens-Above can let you know the precise details of the ISS location at any given time and also give you timings of the next ISS passes overhead. I highly recommend a pre-sunrise/dawn viewing if you can. It looks spectacular as the morning sun hits it. A few years ago it did two passes over Sydney as the shuttle was docking with it. Very interesting to see the shuttle getting closer to the ISS. There is going to be a pass in the morning on the 1st of July starting at 5.40 coming from the NNW. It will last for six minutes
The flashing red/green thing is most likely one of the larger stars rising. If its down closer to the horizon from your view point you are looking at it through more of the layers that surround earth (ionosphere, stratosphere, etc) and it is more than likely it is light refraction through these layers that is causing the red green flashing (heat rising from the day can cause shifting refraction, sort of like heat haze).
Last edited by Stephen Brown; 22nd June 2010 at 07:46 PM.
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