Answer:

neilarmstrong

Answer	Crossword Clue
NEILARMSTRONG	Author of quote
NEILARMSTRONG	Noted rock collector.
NEILARMSTRONG	Famous first man of a sort

NEILARMSTRONG	Journeyman?
NEILARMSTRONG	He was first
NEILARMSTRONG	Figure seen on the lunar surface
NEILARMSTRONG	Who said "I put up my thumb and it blotted out the planet Earth"
NEILARMSTRONG	Lunar lander of 7-20-69