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.

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

He claims to be a true democrat at heart.

He is studying the history of National Socialism.