Conrad Malin-Smith gave us a talk on The Message of Starlight. In it he explained just how much it was possible to determine by examining the spectra of stars and nebulae. The relative brightnesses of emission and absorbtion lines reveal a great deal, not only about composition, but also about temperatures, masses, and relative motions of the objects being observed.
An active organisation for everyone in Bromley and the surrounding areas with an interest in astronomy and space technology