He is majoring in aerospace engineering.

He walked on the moon wearing a space suit.

I am interested in space exploration.

He is passionate about exploring his own innerverse.

He believes that aliens exist.

He is reading a book about space flight.

In philosophy, we consider ourselves a part of the macrocosm.

His dream is to do a space walk.

His dream is to walk in space.

The possibility of that plan succeeding is high.