Cosmic Philosophy by Tsiolkovsky

On this website an inquisitive reader will find a lot of philosophical works by Konstantin Tsiolkovsky, some of which have never been published before. Team members of this project are convinced that Tsiolkovsky’s outstanding personality doesn’t deserve to be forgotten and the brainchildren of this great inventor and thinker are worth making them available to everyone for free.

All the papers by this renowned scientist and prescient of the future are posted on this website in PDF format, which allows readers to study them from any computer or mobile device.



Citizens of the Universe (1933)

Conditional Truth (1932)

Creatures higher than a Man (1939)

Creatures from Different Stages of Evolution ()

Evaluation of people (1934)

Planets are inhabited by living creatures (1933)

Non-resistance or struggle? (1935)

Doubtfulness of any philosophy (1934)

Necessity of Cosmic Mindset (1934)

Preface to all my works (1932)

Conversion Table




Tsiolkovsky & Bicycle

Space prophet

Konstantin Tsiolkovsky’s 155th birthday / Google Doodles Sep 17, 2012

Tsiolkovsky with his scientific paper opens eyes for new technology

Father of Space Travel




Photographs of Konstantin Tsiolkovsky