Nikolai Kardashev

Soviet and russian astronomer.

Born April 25th, 1932 in Moscow.

Died August 3rd, 2019 at 87 years old in Moscow. [ref]

Occupations
academic, astronomer, astrophysicist, inventor
Wikipedia

Death is a challenge. It tells us not to waste time… It tells us to tell each other right now that we love each other. Leo Buscaglia