Early Telescope
The birth of astronomy can be dated at 1609. That year in Pudua,
Italy, a professor of mathematics, Galileo Galilei, made a telescope and
trained it on the heavens. He became the first person to see the mountains
on the Moon, the four large moon of Jupiter, and the phrases of Venus.
His observations helped convinced him and other astronomers that the Sun
and not the Earth was the centre of our planetary system.
Galileo's telescope (known as refractor)
used a pair of lenses to gather light and produce a magnified view of the
heavenly bodies.
(above) Galileo pioneered astronomy through the telescope, leaving sketches
and detailed notes.
(above) Galileo's telescopes have magnifications of 14 and 20.
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