Semi-Daily Journal Archive

The Blogspot archive of the weblog of J. Bradford DeLong, Professor of Economics and Chair of the PEIS major at U.C. Berkeley, a Research Associate of the National Bureau of Economic Research, and former Deputy Assistant Secretary of the U.S. Treasury.

Monday, August 21, 2006

Hoisted from Comments: Planetize the Moon!

At LowLife writes:

I have no idea why they seem to be bending over backwards to prevent the moon from becoming a planet. As it's bigger than Pluto why would it's sharing an orbit with the Earth disqualify it?

I had always wanted to live in a solar system with a binary planet. Please help make my dream come true!

Of course, Ganymede is a lot bigger than Luna... but IIRC, Ganymede's orbit is at times concave to the sun, while Luna's is always convex to the sun...


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