- On his last day he dropped by my office in the Computer Laboratory to say goodbye. I asked what he would be doing now, and he said he was going to spend some time on a project of his called Valgrind. “What’s Valgrind?” I asked. It was one of those this-will-change-your-life moments.
- Sagittarius A (Wikipedia)
Sagittarius A (Sgr A) is a complex radio source at the center of the Milky Way, which contains a supermassive black hole. It is located in the constellation Sagittarius, and is hidden from view at optical wavelengths by large clouds of cosmic dust in the spiral arms of the Milky Way. The dust lane that obscures the Galactic Center from a vantage point around the Sun causes the Great Rift through the bright bulge of the galaxy.