Suppose We Discover a "Super-Earth" at a Distance of 10AU

question 20

Multiple Choice

Suppose we discover a "super-Earth" at a distance of 10AU from its star.Should we consider it to be potentially habitable?

• A)Yes,its atmosphere may contain substantial amounts of greenhouse-type gases that can keep the planet warm beyond the usual boundaries assumed for habitable zones.
• B)Yes,because its host star must be much bigger in order to have a super-Earth,so it will be much hotter there.
• C)No,only planets at approximately 1AU will ever be potentially habitable.
• D)No,greenhouse gases "freeze-out" at those distances.

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