GOLDILOCKS

CARBON CYCLE

• Carbon cycling through the planet
• CO2, living organisms
• Water is a carbon sink
• Volcanoes contribute large amounts of carbon
• Fossil fuel burning contribute more

WATER CYCLE

• Vapor ==> Liquid is condensation
• Liquid ==> Vapor is evaporation
• Creates currents, weather, and climate

VENUS

• Rocky, no moon, no rings
• Spins retrograde
• Temperatures up to 810°
• 6,051.8 km radius (0.949 Earths)
• 4.87x10^24 kg mass (0.815 Earths)

EARTH

MORE VENUS

• Thick atmosphere, acidic gases
• 96.5% carbon dioxide, 3.5% nitrogen (mostly)
• 92 bar atmospheric pressure
• 0.718 AU - 0.728 AU (1 AU = Earth to Sun distance)
• No carbon cycle, no liquid water (vapor), no life.

EARTH

• Rocky, one moon, no rings
• 15° C average temp (59° F)
• 6,370 km radius
• 1.08x10^12 km^3 volume
• 5.97x10^24 kg mass

EARTH 2: THE VENGENCE

• 101.3 kPa atmospheric pressure
• 78% nitrogen, 21% oxygen
• 1 AU average distance from sun
• Carbon cycle present, water in all states
• Life is present (needless to say)

MARS

• 3,400 km radius (0.533 Earths)
• 6.42x10^23 kg mass (0.197 Earths)
• -63°C average temp (-81°F)
• Rocky, 2 moons, no rings
• 1.38 AU - 1.67 AU

THE RED ONE

• 0.64 kPa air pressure
• 95.3% carbon dioxide, 2.7% nitrogen
• No carbon cycle
• Ice at poles, permafrost
• Life may be present (or was), methane detected