I dream of traveling through the universe someday.

The study of cosmic rays may hold the key to unraveling the mysteries of the universe.

Uchuu-kun, have you finished your homework for today yet?

He walked on the moon wearing a space suit.

I am interested in space exploration.

He is majoring in aerospace engineering.

He believes that aliens exist.

He is reading a book about space flight.

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

He is majoring in astronautics.