The setting sun
We usually speak of the sun setting in the west, but technically it only sets due west at the spring and autumn equinoxes.
Today, the Gregorian calendar is virtually universally accepted for everyday secular use, but its origin stretches back more than 6000 years.
A gift for unveiling the universe
The telescope you've been given for Christmas is great for sightseeing in the night sky, as well as bringing out your inner astrophysicist.