SpaceWatchtower

By Glenn A. Walsh Reporting for SpaceWatchtower Every four years (usually), the calendar year is longer by 24 hours than the previou...

This graphic generally shows the location and configuration of the Earth, in relation to the Sun, at the times of Solstices and Equinoxe...

                                 Amateur Astronomers Association of Pittsburgh (AAAP) Co-Founder Leo J. Scanlon (left), who would later ...

This photograph shows a U.S. Naval Officer, at sea, practicing Celestial Navigation with a sextant. [Image Sources: U.S. Navy (Photographe...

In a rare color photograph from 75 years ago, Navy sailors save another sailor who jumped overboard after a Japanese torpedo hit the USS We...

Monument commemorating the very first Allegheny Observatory Director, Dr. Philotus Dean, on Pittsburgh's North Side not far from Allegh...