parallax
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
The apparent change in an object's position when it is viewed from two different points.
Test yourself
Which word fits the gap? "Astronomers use _____ to measure the distance to nearby stars."
Answer: parallax
In your own words, what does "parallax" mean?
The apparent change in an object's position when it is viewed from two different points.
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