Final session of ExSSII on Earths, Super-Earths and Habitability
Dimitar Sasselov - high density exoplanets
HAT-P-20b - 14 gm/cc - hot 7 M_J giant planet, no prob modeling as degenerate H/He core
Kepler-10b - 9 gm/cc - rocky
Earth's central density 13 gm/cc
Super-Earths expected to…
Kepler team has another excellent visualization of their discoveries.
An orrery of the currently known multi-planet systems, as a youtube animation.
Dan Fabrycky put this up
h/t Marketing for Scientists
Can you believe that I had a fight today with someone who's been dead for over 350 years, and I'm losing? -- Ethan, yesterday
Of course you can believe it, when the man I'm fighting with is Johannes Kepler. I don't get a chance to tell you about my research very often, mostly because it's still a…
I don't do this any more, but in the past I did what many astronomy professors do when teaching introductory astronomy: tell the tale of Tycho, Kepler, and Newton, as a way of introducing and describing planetary orbits. It's such a great story, as it shows the concrete struggle we as a race went…