Greeks
It means "wanderer" because planets moved separately from stars
Why did the Greeks use the word "planet"?
The first one means spinning on an axis and the second means going around an object
How are the terms rotate and revolve different
1846
When was Neptune discovered?
Mercury, Venus, Mars, Jupiter, and Saturn
Which planets could the Greeks see?
The path of an object around a larger object in space
What is an orbit?
1781
When was Uranus discovered?
The inference the Earth was the biggest heavenly body in the universe
What was Ptolomy's incorrect inference?
Ellipse
What is the shape of an orbit?
350 BC
When did Aristotle realise Earth was a sphere?
He wrote an encyclopedia in 140
Who is Ptolomy?
Sometimes it is closer to the sun than Neptune and sometimes it is further
What is so unusual about the orbit of Pluto
1610
What year did Galileo observe craters on the moon?