... 10 Emel'yanenko et al. at the heart of what we have called the SP comet fading problem. ... Icarus 181, 178204 (2006) S.S. Davis, Condensation front migration in a protoplanetary nebula. Astrophys. ...
... was one of my most intimate friends'', she wrote, ``warmhearted and kind, a charming companion, with all the liveliness and ... 32. Colvin (see note 3), 411. 33. The object was probably the Ring (planetary) nebula. 34. Hare (see note 16), 155. 35. ...