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.

A parsec is a unit of distance used in astronomy.

I will work using this laptop.

We walked a long distance.

What is the unit of measure for this product's weight?

You need to use your head to solve this problem.

He is using that coat from winter to spring.

He has astronomical knowledge.