On March thirteenth, Clyde Tombaugh and V.M Slipher announced the discovery of a new planet. The date was the seventy-fifth anniversary of Mister Lowell's birth.

Mister Tombaugh continued to record the motion of the new planet for thirteen years. He found more than seven hundred small bodies that orbit the sun, called asteroids. He also discovered a number of star systems called galaxies.

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During his life, Percival Lowell did not enjoy the success he hoped to find in astronomy. He died long before the search for Planet X resulted in the discovery of Pluto. And his theories about waterways and complex life on Mars have been disproved. In nineteen sixty-five, NASA's Mariner Four spacecraft showed that no waterways existed on Mars.

Yet, the institution Mister Lowell established in Flagstaff, Arizona, has made many discoveries in addition to that of Pluto. Evidence that the universe is expanding was first discovered at Lowell Observatory by V. M. Slipher. Also, the rings around the planet Uranus were discovered there.

Lowell Observatory now has four telescopes and is continuing to expand. It supports programs that bring astronomy to the public.

Astronomers at Lowell and many other observatories continue to search for life beyond our planet. Their efforts continue Percival Lowell's tradition of scientific investigation.

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