He is an expert in theoretical physics.

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.

Astrobiology is a very interesting field of study.

Cosmic background radiation is considered evidence of the Big Bang.

He is majoring in aerospace engineering.

Special relativity is one of the fundamental theories of physics.

General relativity is a theory of physics proposed by Einstein.

The National Aeronautics and Space Administration announced a new space exploration plan.