Clyde Tombaugh

Clyde Tombaugh was born in Illinois in 1906 and grew up with a strong interest in astronomy.

He built telescopes and made detailed observations that eventually helped him earn a position at Lowell Observatory in Arizona.

At Lowell Observatory, Tombaugh used a blink comparator to compare photographic plates taken at different times.

Most stars stayed fixed in the images, but an object in the Solar System would shift position against the background.

In 1930, Tombaugh identified the moving object that became known as Pluto.

The discovery expanded the known Solar System and made Tombaugh one of the most famous observational astronomers of the twentieth century.

NASA's New Horizons spacecraft launched in 2006 and flew past Pluto in 2015.

A small portion of Tombaugh's ashes was carried aboard the spacecraft, creating an extraordinary link between the person who discovered Pluto and the mission that later explored it close-up.

Tombaugh discovered Pluto by watching the sky from Earth. New Horizons later traveled billions of kilometers to study the same world directly.

That creates exactly the kind of connected story TransitSatellite can build: person, object, spacecraft, mission, and trajectory.

Tombaugh could not have known what a future spacecraft would reveal about Pluto.

His story shows how one observation can become the starting point for decades of later science and exploration.