Star clusters are groups of stars that occur close to each other in space and are gravitationally bound to one another.
The Pleiades are an easily recognisable star cluster, resembling a tiny version of the ‘Big Dipper’. However, through the telescope, 50-100 stars are visible, making it an incredible sight. It is a group of very young, hot, bright stars, very close together.
The Pleiades are best seen about October-February.
Wikipedia image: A colour-composite image of the Pleiades.