1965 - James Gunn[?] and Bruce Peterson[?] use observations of the relatively low absorption of the blue component of the Lyman-alpha line[?] from 3C9[?] to strongly constrain the density and ionization state of the intergalactic medium
... Bob (usually referred to as "Bobby"), the youngest member of the group, played rhythm guitar. Pigpen played keyboards, harmonica and, was an inspirational vocalist until ...