The prolific comet hunter William A. Bradfield tallied 18 comets in his lifetime, each discovered visually and credited to him alone.
Sky & Telescope editors and staff made our annual pilgrimage to the astronomy expo to meet with our readers and get the scoop on the bevy of new products unleashed this year.
The "comet of the century" famously lost its battle against the Sun, but you can still enter our photo contest for a chance to win some hefty prizes. Don't miss the December 31st deadline!
The 2013 Nobel Prize in Physics has been awarded to two physicists who postulated the existence of the Higgs field, the source of many elementary particles' masses. For those still scratching their heads on what the Higgs is, here's what you need to know.