On 9th May 2016, a transit of Mercury across the Sun was expected to take place. It had been quite a while (thirteen years) since the previous one, which took place back in May 2003. Therefore, it was one neat chance to observe this event which, though less spectacular than other types of phenomena, is anyway quite interesting. Furthermore, the observing conditions were quite favorable for Italy and the whole of Europe (first contact at 1:12 pm local time, last contact around sunset, at 8:40 pm local time).
The transit of 2003 had been perfectly visible, since it had taken place in the beginning of a summer season which later went on to be one of the hottest and longest ones in decades. Unfortunately, the situation was completely different for this year, since the month of May started with very changeable and unreliable weather. The forecast for the 9th of May left no hope for Northern Italy and for most of Central and Southern Europe.