Mr. Kobu is my best friend.

The blastoderm is formed in the early stages of embryonic development.

There are no words to describe that beauty.

He is always grumbling about trivial things, it's really annoying.

Astrobiology is a very interesting field of study.

Cosmic background radiation is considered evidence of the Big Bang.

He is majoring in aerospace engineering.

The space probe discovered a new planet.

He is an expert in astrophysics, and his research is highly valued around the world.

My dream is to become an astronaut.