It's something many of us have never seen - theInternational Space Station moving across the night sky.

This week photographer Gary Randall of Brightwood, Oregon captured the ISS in an incredible time-exposure shot. He used a Nikon D3.

We asked Gary to explain how he 'got the shot.'

I set my aperture wide open F/2.8 and raised the iso (light sensitivity) to 1600 which allowed my a 30 second exposure. The photo represents three 30 second shots for a total of 90 seconds of travel. Instead of setting the camera to take one 90 second exposure I took three 30 second exposures and layered them together to make one long trail of light. I could have set the camera to take a single 90 second exposure but I didn't know just how long that it would take for the ISS to travel across the sky. I opted for 30 seconds three times. Digital is awesome for work such as this.

If someone wanted to get this shot they should set their camera on a tripod and set the aperture as wide as possible and raise the iso to a point that will allow a 30 second exposure, take some test shots and then wait until the ISS appears on the horizon. If only one exposure is all that possible then the trail of light will just be shorter.

Want to try and get a similar shot yourself, or just see the International Space Station drift across the night sky? For a guide to ISS sighting opportunites click here.

If you have an amazing photo you'd like to share, upload it to our Your News section and tell us how you 'got the shot.'

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