Iridium flares

Have you ever think what happens when a sunlight reflects from the satellite?

The answer is this:

An iridium flare on the night sky

A huge flash across the sky just for a second.

The most spectacular flash happens when the ISS (International Space Station) reflects the sunlight back to earth.

There is a website called "Heavens Above", which can calculate where and when those flares will occur with approximation of 1 second! That's very accurate approximation, so if you want to see this flash, you have to find a place outside the city lights, check it's coordinates, visit this site, write down a time, when this even occurs and the azimuth and just go to that place and watch the sky!

In my humble opinion, this effect is worth seeing. I've seen it many times and it's really great. I just wonder what algorithms can predict those events so accurately.