Fifth Planet Science Fiction Paperback Book by Fred Hoyle and Geoffrey Hoyle

Another star is due to pass close to the sun, close enough for conventional spacecraft to reach it. 

The first planets observed are four gas-giants, but then an inner 'Fifth Planet' is found. Signs of chlorophyll are detected, suggesting that it supports life. 

Rival Soviet and US expeditions are launched to visit it.

Book is in acceptable condition. General shelf and corner wear. Cover fraying along the edges. Some white marks on front and back cover. Light staining on the interior and exterior. The spine has some issues (See photo #3). Staining on the front cover. Some tears at the top of the back cover. Previous owner signed their name on the inside first page in the margin. A solid reading copy. Please see photos for details, and let me know if you have any questions.

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