During the last part of May, three planets will be dancing around each other low in the west after sunset. Venus, Jupiter and Mercury will give a vivid illustration of the origin of the word “planet”, which means “wanderer”. If you ever wanted a demonstration of how planets move against the background stars, this is your chance! Here are links to two websites that give observing details:
http://www.skyandtelescope.com/observing/highlights/192020551.html