This boundless universe is beyond our imagination.

This huge park is bustling with people every day.

Looking at this vast sea, I feel small.

Hiroshi is my best friend.

I dream of traveling through the universe someday.

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

I was moved by his immeasurable and boundless love.

The problem of space debris could potentially have a significant impact on future space development.

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

He proposed a new theory about cosmology.