Is the term planet new?
No
Who thought planets orbited the Earth?
Ptolemy
In what type of motions?
deferent and epicycle motions
Was there another idea that had been suggested before?
Yes
Once or many times?
many times
Did that idea say the Earth orbited a black hole?
No.
What, then?
That the planets orbited the sun
When was that view supported by some actual evidence?
17th century
What type of observations was the evidence from?
telescopic astronomical observations
Who obtained the evidence?
Galileo Galilei
Was anyone else making analysis at the same time?
Yes
Who?
Johannes Kepler
Who collected the data Kepler was looking at?
Tycho Brahe
Did he find that the planets' orbits were circular?
No.
What type of orbits did they have, then?
elliptical
What type of axis do planets rotate around?
tilted
Do many planets share features with the Earth?
Yes.
What's an example of one?
Volcanism
When was a resolution adopted defining planets within the solar system?
2006
By who?
International Astronomical Union