Gliese 667Cc

• Gliese 667Cc is a Super Earth exoplanet 22 light years from Earth.
• The planet orbits around Gliese 667C, a small red dwarf star with a mass 31% of that of the sun.
• Gliese 667Cc orbits eight times closer to its host star than Earth orbits the sun.
• The planet receives a similar amount of energy from its star as Earth receives from the sun.
• The mass of Gliese 667Cc indicates that it could be a rocky world.
• Its host star would appear more than three times larger in the planet's sky than the sun does on Earth.
• There are thought to be at least seven planets in the Gliese 667C system, three of which orbit in the habitable zone.
• Gliese 667 is actually a three star system, the two other stars are both orange dwarfs which have a mass of 73% and 69% of the sun respectively.
• The red dwarf star Gliese 667C is extremely distant from its two orange dwarf companions, orbiting them at distance of between 5 and 20 billion miles (8 to 32 billion km)

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Gliese 667Cc revolves around its host star at a distance of 11.5 million miles (18.5 million km) and takes 28 days to make one complete orbit. Gliese 667Cc is estimated to have a mass around 4 to 5 times that of Earth, its radius is unknown but with an Earth like composition it could be around 1.6 times larger than Earth. Gliese 667Cc orbits well inside the habitable zone of its host star, if the composition of its atmosphere is similar to Earth it may well have surface temperatures of around 30C (86F). This would allow for the presence of liquid water which makes Gliese 667Cc an exciting prospect in terms of habitability.

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Host Star: Gliese 667C
Host Star Type: Red Dwarf - M Class
Host Star Mass: 31% of Sun
Constellation: Scorpius

Other stars in system:
Star: Gliese 667A
Star Type: Orange Dwarf - K Class
Host Star Mass: 73% of Sun

Star: Gliese 667B
Star Type: Orange Dwarf - K Class
Host Star Mass: 69% of Sun

Distance from Earth: 22 light years
Planets Detected in System: 6 confirmed, 1 unconfirmed

Discovery Date: November 21st 2011
Detection Method: Radial Velocity
Exoplanet Type: Super Earth

Mass: Around 4 to 5 x Earth
Diameter: Unknown, around 1.6 to 2.2 x Earth with similar composition

Distance from host star: 11.5 million miles (18.5 million km)
Orbital Period: 28 days

Atmosphere: Unknown, a similar atmospheric composition to Earth would produce temperatures slightly higher than on Earth, a thicker atmosphere may produce a runaway greenhouse effect.
Temperature: Unknown, possibly around around 30C (86F) with a similar atmospheric composition to Earth.
Gravity: Unknown, 1.6 to 2.2 x Earth's gravity with a similar composition to our own planet.

Possibility of Life: With a similar atmosphere and composition to Earth it is possible life could exist on GJ 667Cc.

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