🎴 Flashcard Mode
Supernovas on Stamps
Card1 / 14
Mastered0
Review0
QuestionClick to flip
Which country issued the first stamp featuring a supernova?
AnswerClick to flip back
A
United States
💡 Explanation:
The United States issued the first stamp featuring a supernova in 1969, commemorating the 50th anniversary of the discovery of Cepheid variable stars.