To celebrate World Meteorological Day (#WorldMetDay) on 23rd March, the Royal Meteorological Society (RMetS) are running a competition with @StormHour. The theme of this year's World Meteorological Day is 'Understanding Clouds', so we are running a mini cloud competition.
Noctilucent Clouds photographed by NASA.
In November 2013 you recall Comet ISON passed close to the Sun. Scientists hoped it would remain intact and provide a spectacular comet tail visible to us on Earth. Unfortunately it broke up and was never visible to the naked eye.