Sundials are amazingly simple yet effective devices. They range from sticks planted in the ground to precision-machined marvels costing thousands of dollars. The design shown here can be constructed in minutes from materials lying around your house, but it’s surprisingly accurate.

Here are some tips for hunting one of nature's most captivating sights.

These communications satellites can briefly outshine Venus as they spray the ground with reflected sunlight.

Trained eyes and clear, dark skies can open up a new dimension in deep-sky observing.

Lurking in the seemingly changeless constellations are a few inconstant stars that pulse and eclipse. Here are a dozen variables that are easy to observe.

Few observers have spotted an ever-elusive "new" star. Fewer still have done it twice. Observing styles and techniques are as varied as the searchers themselves.

Bright skies aren't empty skies. See for yourself how many treasures lie hidden in the glow of a city sky.