The Twenty-Eight Mansions is one of the constellations used in ancient Chinese astronomy.

He has a deep interest in astronomy.

Radio astronomy plays a very important role in understanding the universe.

Infrared astronomy provides a new perspective on understanding the universe.

Her constellation is Libra.

He ate one apple.

He solved the problem using a new method.

This ancient artifact is very valuable.

It is very interesting to learn about ancient history.

My friend came from China.