Gravitational lensing produces small (arcsecond) deviations. These things are only localized to arcminute scale, so graviational lensing is negligible.

I can't agree with this enough, especially the pushups. I've been doing ~10 high-rep pushups sets as part of workout I do a few times a week. (I started with the program at hundredpushups.com, but now I roll my own based on the terminal workout.) I alternate sets of pushups with sets of (weightless) squats, roughly 30.

Especially at higher reps, these are *plenty* to get your heart rate up, so you get in your cardio. High-rep pushups sets are essentially a plank position held fr >30s, so you get some core. Pushups & squats hit nearly as many muscles as possible for the time spent, so this will also give you a good base if you decide to hit up a gym at some point.

Thanks for your armchair dismissal of many life works. Fwiw, I'm an astrophysicist and I'll take the time to correct one point. Supermassive black holes weigh in around 10^9 solar masses. Galaxy masses are >10^12 solar masses. Furthermore, when accreting at the maximum (Eddington) rate, black holes grow exponentially. It's not difficult to grow a 10^9 solar mass black hole in 10^9 years. Really the only hard part is getting the gas close enough to the BH to accrete; this problem and the hierarchical merger of black holes are active research areas.

I have CAPSLOCK mapped to ESC, which makes switching modes in vim/pentadactyl much easier on the fingers. (Especially on my ThinkPad, where the ESC is up in Ultima Thule.)

It's more correct to say it's an indeterminate form, and what it evaluates to depends on what's under your infinity's hood. Two examples:

lim x--> inf of x/x is "infinity/infinity" and evaluates to 1.

lim x--> inf of e^x/x is also "infinity/infinity" but evaluates to infinity.

They lost commercial power due the big storm system that went through the DC area.

Well, there is clearly enough circumstellar (circumpulsar?) material to generate the pulsar wind nebula detected in X-rays, but as with all collisionless shocks, this material must be tenuous.