2. Tightly Packed Stars
For this sight to see this summer you will need to get out your telescope, but the view will be so worth it. To the naked eye, a globular cluster appears as one big star, when in fact – as we can see through an everyday telescope – they are in fact made up of lots of little stars packed together. Try to spot M22, which is large enough to be visible easily because it is both large, and relatively close to Earth.