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Astronomy and Space Science Quiz
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How far have spacecraft from Earth travelled into space?
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A
Somewhat less than one Light-day
💡 Explanation:
Voyager 1, launched in 1977, is the farthest human-made object from Earth at over 160 astronomical units (about 24 billion km or 15 billion miles). One light-year is approximately 9.46 trillion kilometers. Voyager 1 has traveled less than 0.2% of one light-year. A light-day is about 26 billion kilometers, so Voyager 1's journey is somewhat less than one light-day from Earth.