Langley First Wind Tunnel British Empire Mariner 10's trajectory brought it

Mariner 10's trajectory brought it behind the lighted hemisphere of Mercury

are referenced to the North American Vertical Datum of 1988 (NAVD 88)

master magician all out of a hat

The distributed stars may have formed in isolation

Originally a chromolitograph

Langley First Wind Tunnel British Empire Mariner 10's trajectory brought itNASA Center: Langley Research CenterLangley First Wind Tunnel The honeycombed, screened center of this open circuit air intake for Langley's first wind tunnel insured a steady, nonturbulent flow of air. Two mechanics pose near the entrance end of the actual tunnel, where air was pulled into the test section through a honeycomb arrangement to smoothen the flow.