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 is: First Artificial Satellite to Enter Earth's Orbit

and the answer is: SPUTNIK

Word Meaning:

SPUTNIK — (historical) Any of a series of Soviet robotic space satellites, especially the first one in 1957.

Definitions from Wiktionary.

First Artificial Satellite To Enter Earth's Orbit - Train Travel CodyCross Answers | CodyCross Solutions