Today's Sentence
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You may have heard that astronomers don't consider Pluto or its brethren to be planets. However, most planetary scientists still do, which is why we're using that terminology here.
Key Vocabulary
1. astronomers
astronomers
[əˈstrɑnəmərz ] (n.)
astronomy
[əˈstrɑnəmi ] (n.)
astrology
[əˈstrɑləʤi ] (n.)
2. brethren
brethren
[ˈbrɛðrən] (n.)
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