Black Holes and Other Marvels

From Author Wars - https://authorwars.com/publications/black-holes-and-other-marvels-4628.html

Overview:

Title: Black Holes and Other Marvels
Author: Jerry Pournelle
Year: 1978
ISBN-10: 0708880142
Publisher: Futura
Price: £0.95
Pages: 334
Binding: Paperback
Type: Anthology
Title Reference: Black Holes and Other Marvels
Notes:
Month from amazon.uk
"Cygnus X-1" and "The Salesman Who Fell From Grace With the Universe" are credited as "Two Poems" in contents list.
Cover art credit from Spacecraft in Fact and Fiction, page 106