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Aten asteroid

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noun Astronomy.
one of a small group of asteroids whose orbits cross that of the earth and whose semimajor axes are smaller than that of the earth.
QUIZ
THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?
Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.
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In the UK, COTTON CANDY is more commonly known as…
Compare Apollo asteroid.

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