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Frequently asked questions (FAQ)

What is an Iridium flare?

An Iridium flare is caused by the sun being reflected from one of the three main mission antennae (MMA) of an Iridium satellite. The MMAs are flat, highly polished aluminium surfaces, and when the angles are just right, they can reflect the sun just like a mirror. There are over 70 of these communications satellites in orbit, and they are operated by the Iridium LLC Consortium. For more information, please see our Iridium flare help page.