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Astronomy Vocabulary

Across
Creation of our universe
Galileo Galilei presented supporting observations made using a telescope.
the "Ptolemaic system"
a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
"father of observational astronomy"
Down
in 1519 he formulated an economics principle that later came to be called Gresham's law.
is a key figure in the 17th-century scientific revolution. He is best known for his laws of planetary motion
a superseded description of the universe with Earth at the centre.
His system correctly saw the Moon as orbiting Earth.
"natural philosopher"