Tonight we'll be given a rare chance to watch a blood moon lunar eclipse. While in eclipse the moon will be closest to earth, which is also called "perigee". This means the moon will appear 14% bigger and 30% brighter. The total eclipse will last for a little over an hour.
The last time this happened was in 1982 and the next time will be in 2033... So be sure to watch this one, it's going to be amazing! :)
More info can be found here: https://www.timeanddate.com/eclipse/lunar/2015-september-28