A planet is an astronomical body orbiting a star or stellar remnant that The term "planet" is ancient, with ties to history, astrology, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain "planets" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno and Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community, are no longer viewed as such. 

The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions. Although the idea that the planets orbited the Sun had been suggested many times, it was not until the 17th century that this view was supported by evidence from the first telescopic astronomical observations, performed by Galileo Galilei. At about the same time, by careful analysis of pre-telescopic observation data collected by Tycho Brahe, Johannes Kepler found the planets' orbits were not circular but elliptical. As observational tools improved, astronomers saw that, like Earth, the planets rotated around tilted axes, and some shared such features as ice caps and seasons. Since the dawn of the Space Age, close observation by space probes has found that Earth and the other planets share characteristics such as volcanism, hurricanes, tectonics, and even hydrology.
Is the term planet new?
Who thought planets orbited the Earth?
In what type of motions?
Was there another idea that had been suggested before?
Once or many times?
Did that idea say the Earth orbited a black hole?
What, then?
When was that view supported by some actual evidence?
What type of observations was the evidence from?
Who obtained the evidence?
Was anyone else making analysis at the same time?
Who?
Who collected the data Kepler was looking at?
Did he find that the planets' orbits were circular?
What type of orbits did they have, then?
What type of axis do planets rotate around?
Do many planets share features with the Earth?
What's an example of one?
When was a resolution adopted defining planets within the solar system?
By who?
No
 The term "planet" is ancient
Ptolemy
The planets were thought by Ptolemy to orbit Earth
deferent and epicycle motions
The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions
Yes
Although the idea that the planets orbited the Sun had been suggested many times
many times
Although the idea that the planets orbited the Sun had been suggested many times
No.
Although the idea that the planets orbited the Sun had been suggested many times
That the planets orbited the sun
Although the idea that the planets orbited the Sun had been suggested many times
17th century
s, it was not until the 17th century that this view was supported by evidence 
telescopic astronomical observations
was supported by evidence from the first telescopic astronomical observations
Galileo Galilei
 telescopic astronomical observations, performed by Galileo Galilei
Yes
At about the same time, by careful analysis of pre-telescopic observation data collected by Tycho Brahe
Johannes Kepler
At about the same time, by careful analysis of pre-telescopic observation data collected by Tycho Brahe, Johannes Kepler
Tycho Brahe
At about the same time, by careful analysis of pre-telescopic observation data collected by Tycho Brahe
No.
Johannes Kepler found the planets' orbits were not circular 
elliptical
Johannes Kepler found the planets' orbits were not circular but elliptical
tilted
the planets rotated around tilted axes
Yes.
 Since the dawn of the Space Age, close observation by space probes has found that Earth and the other planets share characteristics such as volcanism, hurricanes, tectonics, and even hydrology.
Volcanism
 Since the dawn of the Space Age, close observation by space probes has found that Earth and the other planets share characteristics such as volcanism
2006
 In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System.
International Astronomical Union
 In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System.