The project for the current Contaminant mission included students endeavoring in a creative writing exercise in which they designed a planet that the crew may visit in some future mission. Students wrote about the origins of the planet, its biomes and creatures, religions, economy and trade, its form of government, languages spoken and the arts and music found there. You can read all about them on the Planets page.
One particularly creative and detailed new world was designed by Adam in 11th grade, as seen below. You can visit his website here