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Why Super-Earths are Not Earth-like

SETI Institute

Tuesday, March 25, 2014 from 12:00 PM to 1:00 PM (PDT)

Why Super-Earths are Not Earth-like

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Event Details

Tuesday, March 25 2014 - 12:00 pm, PDT

Why SuperEarths are not Earthlike

David Stevenson
California Institute of Technology
Kepler data indicate that there are many planets that could be Earthlike
in the sense of having a similar bulk composition.
Dr. Stevenson will explain why such planets are unlikely to be Earthlike
in other respects, especially if they are superEarths (three or so Earth
masses or more).

There are three main points here:
(1) SuperEarths will not separate core from mantle because they are
likely to be so hot internally that the critical temperature is reached for miscibility of iron alloy and silicate material.

(2) Earth is (so far as we know) special in having a water budget that
(expressed as an ocean) corresponds to water depths ~ mountain heights.

(3) The surface will be hot either from a massive atmosphere or proximity
to the parent star.
Have questions about Why Super-Earths are Not Earth-like? Contact SETI Institute

When & Where

SETI Institute
189 N Bernardo Ave
Mountain View, CA 94043

Tuesday, March 25, 2014 from 12:00 PM to 1:00 PM (PDT)

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SETI Institute

The mission of the SETI Institute is to explore, understand and explain the origin, nature and prevalence of life in the universe.

We believe we are conducting the most profound search in human history — to know our beginnings and our place among the stars.

The SETI Institute is a nonprofit corporation founded in 1984 (California Corporation #1261957). The Institute is a scientific and educational organization governed by the provisions of Section 501(c)(3) of the U.S. Internal Revenue Code, and the Institute's Federal identification number for reporting and tax purposes is 94-2951356.

The Institute welcomes support from private foundations or other groups/individuals interested in SETI. Each funded effort (135 separate multi-year projects funded since 1984) is supervised by a principal investigator who is responsible to the Board of Trustees for the conduct of the activity.


Presenting Sponsor (2016): Leonard Tramiel


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Why Super-Earths are Not Earth-like
Mountain View, CA Events Conference

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