Huh: Unless I've botched something:
kT for T = 15 MK is about 1.3 keV;
GmM/R for m = 938 MeV/c², M = 2e30 kg and R = 700,000 km is about 1.0 keV
(In retrospect, it's not surprising they would be the same order of magnitude, as per the virial theorem.)
(In the above I'm implicitly bragging about remembering the mass and radius of the Sun off the top of my head (everyone working in my field knows the proton mass anyway so that's not bragworthy), but I didn't learn them last month, so that doesn't count.)
In an attempt to encourage more people to actually do awesome things (a la instrumental rationality), I am proposing a new monthly thread (can be changed to bi-weekly, should that be demanded). Your job, should you choose to accept it, is to comment on this thread explaining the most awesome thing you've done this month. You may be as blatantly proud of you self as you feel. You may unabashedly consider yourself the coolest freaking person ever because of that awesome thing you're dying to tell everyone about. This is the place to do just that.
Remember, however, that this isn't any kind of progress thread. Nor is it any kind of proposal thread.This thread is solely for people to talk about the awesomest thing they've done all month. not will do. not are working on. have already done. This is to cultivate an environment of object level productivity rather than meta-productivity methods.
So, what's the coolest thing you've done this month?