Process

Historian: This person is responsible for researching the spacecrafts that 
have visited and collected data the group's chosen planet.  The Historian is 
also responsible for documenting important dates in new data discovery.
Geologist:  This person is responsible for seeking important geological 
data.  Examples of geological data would be: temperature, humidity, major 
rock formations, useful organic materials, etc. The geologist will present 
important geological information to the group's argument.
Astrologist: This person is responsible for collecting data regarding 
the planet's distance from the sun, the planet's distance from the earth, as 
well as the order amongst the other planets(e.g. Earth is the 3rd planet from 
the sun).  The astrologist will also need to gather information regarding 
natural satellites and other objects near its orbit.
Mythologist: This person is responsible for researching the mythology of each 
planet's name and present relevant information to the group's argument.