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Rocky planet - 55 Cancri e
May 16 , 2024
192 days
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- Scientists have discovered a rocky planet beyond our solar system with an atmosphere.
- The planet, called 55 Cancri e or Janssen, is about 8.8 times more massive than Earth, with a diameter about twice that of our planet.
- It orbits its star at one-25th the distance between our solar system's innermost planet Mercury and the sun.
- As a result, its surface temperature is about 3,140 degrees Fahrenheit (1,725 degrees Celsius/2,000 degrees Kelvin).
- The planet is probably tidally locked.
- That is it perpetually has the same side facing its star, much like the moon does toward Earth.
- The planet cannot be habitable, it is too hot to have liquid water, considered a prerequisite for life.
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