Colchester, Essex, UK. 21st January, 2017. Two Iridium satellite flares photographed within moments of each other over Colchester in Essex. Long exposure photos captured the almost identical polar flight paths of Iridium 6 (right) followed by Iridium 51 at 17:17 on Saturday 21 January 2017. I have blended the two images to show them in the same frame. Credit: Gary Eason/Alamy Live News

- Image ID: HJ0J9X
Colchester, Essex, UK. 21st January, 2017. Two Iridium satellite flares photographed within moments of each other over Colchester in Essex. Long exposure photos captured the almost identical polar flight paths of Iridium 6 (right) followed by Iridium 51 at 17:17 on Saturday 21 January 2017. I have blended the two images to show them in the same frame. Credit: Gary Eason/Alamy Live News
Gary Eason / Alamy Stock Photo
Image ID: HJ0J9X
Colchester, Essex, UK. 21st January, 2017. Two Iridium satellite flares photographed within moments of each other over Colchester in Essex. Long exposure photos captured the almost identical polar flight paths of Iridium 6 (right) followed by Iridium 51 at 17:17 on Saturday 21 January 2017. I have blended the two images to show them in the same frame. The slight blurring of the surrounding stars is due to the Earth's movement during the length of time the camera shutter is open. The flare phenomenon is caused by the reflective surfaces on satellites (such as antennas, SAR or solar panels) reflecting sunlight directly onto the Earth below and appearing as a brief, bright "flare" as the satellite passes overhead. Credit: Gary Eason/Alamy Live News
Location: Colchester, Essex UK