Above all, he made his name with his illustrations to the "Siberian Journey" that was published in 1768 by a French astronomer and experimental scientist called Chappe.

In 1892 an astronomer called E.E Barnard found a new moon using his observatory in California.

"I just got word from an astronomer called Tyndam, who's on the scientific committee that'll be meeting with the Kronians next week-chaired by somebody called Voler."

They looked exactly like what the astronomers called Fraunhofer lines, when the only way they had to know what a star or planet was made of was to study it through a spectroscope.

"Come and see, come and see," the astronomer called softly.

The reason why many people think there are Martian canals is because an astronomer called Giovanni Schiaparelli claimed to have seen a lot of long straight lines on Mars, which he named "canali" and named them after rivers on Earth.

For the observations, conducted in Hawaii and Chile, the astronomers used extremely sensitive electronic detectors, called charge-coupled devices, attached to optical telescopes.

One of the activities Strong promoted during the International Geophysical Year was a program for amateur astronomers called Operation Moonwatch.

Another astronomer called Galileo Galilei built his own telescope, and used it to look more closely at the stars and planets for the first time.

An astronomer, called Joe Universe, soon takes over, with lectures and slides.