Frank was an astrophysicist as well as American radio astronomer also.
He always believed that Aliens exists in our galaxy somewhere.
All his life he tried to prove that Alien exists in real life.
in the search for extraterrestrial intelligence (SETI) , Frank invented SETI scientific field.
He gave a mathematical calculations about the framework of total civilizations in our galaxy..
The director of the Arecibo radio observatory in Puerto Rico was also him.
Since 8 years old in childhood Frank became interested in stars.