There is a deep bond between him and me.

There is a secret between him and me.

He is writing a thesis on celestial mechanics.

Astrocytes are one of the important support cells in the brain.

Alpha Centauri, in the constellation of Centaurus, is the closest star to Earth.

He said, 'A nameless star comes out in the evening,' teaching me that achieving a goal is not easy.

His dog has yellowish-brown fur.

The brown pelican lives along the coastline.

I draw pictures using brown charcoal.

Pluto is classified as a dwarf planet.