• That was an opening shot in a new chapter of space exploration.
• The construction of an atomic clock opened ( up ) a new era ( or chapter ) in the study of ...
• That was an opening shot in a new chapter of space exploration.
• The construction of an atomic clock opened ( up ) a new era ( or chapter ) in the study of ...
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012