Today in Astronomy 102: black hole observations, volume 2 From last time: GRO J1655-40, the best case for black-hole detection. The center of the Milky Way Galaxy: solid…
Unit 2: Very Small and Far Away: Measuring and Observing Extremes Resembling a gigantic hubcap in space, a 3,700-light-year-wide dust disk encircles a 300-million- solar-mass…
Today in Astronomy 102: black hole observations, volume 2 From last time: GRO J1655-40, the best case for black-hole detection. The center of the Milky Way Galaxy: solid…