The Skyline Ruler is available in seven cityscapes: London, Paris, NYC, Berlin, Amsterdam, Toronto, and Jerusalem. Each $9 plastic piece has a full 20cm ruler on the bottom edge (yes, even the NYC ...

Since the Milky Way is a flat disk, it should appear as a straight line across the sky. However, in photos such as on pages 50–51 of the April issue, it is a curved arc.

On June 3, six planets form a straight line through the pre-dawn sky that stretches from Jupiter on the eastern end (closest to the horizon) up through Mercury, Uranus, Mars, ...