Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...

Observing the night sky can be done with no special equipment, although a sky map can be very useful, and a good telescope or binoculars will enhance some experiences and bring some otherwise ...

Pluto looks just like one of these! (Click here for larger image) Charts are a great way to locate things in the night sky but they can be a bit confusing when there are lots of faint stars.

Getty Images A seven-luminaries-deep parade of planets will line up and light up the night sky this ... an astronomy app like Sky Tonight. Find Saturn on the sky map, and use the Time Machine ...

Years after his death, Tombaugh used a blink comparator to analyze photographic plates of the night sky, eventually spotting Pluto. Today, visitors can explore Lowell Observatory, which opened an ...