First Artificial Satellite to Enter Earth's Orbit
This page is the CodyCross answer for the clue below from Train Travel, Group 708, Puzzle 4 (Agatha Christie).
Question
First Artificial Satellite to Enter Earth's Orbit
Answer
SPUTNIK
Word Meaning:
SPUTNIK — (historical) Any of a series of Soviet robotic space satellites, especially the first one in 1957.
Definitions from Wiktionary.