Earth's First Artificial Satellite, __1

This page is the CodyCross answer for the clue below from Tracking Time, Group 1047, Puzzle 1 (Fourth Dimension).

Question is: Earth's First Artificial Satellite, __1

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.

Earth's first artificial satellite, __1 — CodyCross Answer | CodyCross Solutions