Eclipse safety tips video

The North America Nebula (NGC 7000/Caldwell 20) in Cygnus is a fantastic emission nebula, an iconic object providing one of the highlights of the summer sky.

Solar eclipses are relatively rare; they happen when the Moon moves directly and precisely in front of the Sun. Why are they so infrequent, and why do solar eclipses always come in pairs with lunar eclipses?

Mercury is now visible soon after sunset in the west-north-western sky.