Nicolaus Copernicus (1473-1543) - [World History] Copernicus was a Polish astronomer who began studying the earth's solar system in 1496.
(Nicolaus Copernicus; was; a Polish astronomer who began studying the earth's solar system in 1496) (a Polish astronomer; began; studying the earth's solar system; T:in 1496) Context(a Polish astronomer began,List([65, 94))):(a Polish astronomer; began studying; the earth's solar system)
a Polish astronomer began,List([65, 94))
Nicolaus Copernicus a Polish astronomer a Polish astronomer
was began began studying
a Polish astronomer who began studying the earth's solar system in 1496
studying the earth's solar system T:in 1496
the earth's solar system