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This is my first question.

He is world-famous as an astronomer.

He has astronomical knowledge.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

A palatal consonant is produced when the middle part of the tongue contacts or approaches the hard palate.

He is an astronomer studying about the Orion constellation.

He was standing at the high place of the mountain.

Puppis is one of the constellations in the southern hemisphere.