Early Telescopes and Telescopic Discoveries Telescopes were invented around 1600, and about 1609 the first people began to use them for observing the sky.
(Early Telescopes and Telescopic Discoveries Telescopes; were invented; T:around 1600) (about 1609 the first people; began; to use them for observing the sky) Context(about 1609 the first people began,List([86, 119))):(about 1609 the first people; began to use; them; for observing the sky) Context(about 1609 the first people began to use,List([86, 126))):(about 1609 the first people; began to use them for observing; the sky)
about 1609 the first people began,List([86, 119)) about 1609 the first people began to use,List([86, 126))
Early Telescopes and Telescopic Discoveries Telescopes about 1609 the first people about 1609 the first people about 1609 the first people
were invented began began to use began to use them for observing
T:around 1600
to use them for observing the sky
them for observing the sky
the sky