Petr Čepek as Jan Jesenius

Emma Černá as Maria

Rudolf Hrušínský as Rudolf II.

Miloš Nedbal as Fels

Martin Huba as Johannes Kepler

Milan Kňažko as Jan Mydlář

Leoš Suchařípa as Pavel Michna z Vacínova

Táňa Fischerová as Floro

Jan Kačer as Jáchym Ondřej Šlik

Stano Dančiak as Kryštof Harant z Polžic a Bezdružic

Mikuláš Huba as Bohuslav z Michalovic

Ota Sklenčka as Václav Budovec z Budova

Lubomír Kostelka as Jindřich Matyáš Thurn

Václav Knop as Ferdinand II.

Andrej Hryc as Franz Melchiar

Jan Kanyza as Zdeněk Vojtěch Popel z Lobkovic

Jiří Bartoška as Fridrich Falcký

Vít Olmer as Vilém Slavata z Chlumu a Košumberka

Karel Augusta as Jaroslav Bořita z Martinic

Bohuslav Čáp as Filip Fabricius

Václav Vydra as Albrecht Jan Smiřický

Zuzana Kronerová as Beata

Jiří Kostka as Kašpar Kaplíř ze Sulevic

Dana Hlaváčová as Elfrieda

Vlastimil Venclík as Jacob Hoefnagel

Bára Štěpánová as Pia

Bronislav Poloczek as Jakub

Jan Kuželka as Gregorius

Rostislav Kuba as Ambrosius

František Husák as Ostrštok

Jan Teplý as Přibík Jeníšek z Újezda

Marta Richterová as

Vladimír Hrubý as Priest

Oldřich Velen as

Rudolf Hrušínský as

Milan Riehs as

Josef Karlík as Tycho de Brahe

František Řehák as Vavřinec Benedikt z Nudožer

Pavol Mikulík as don Baltasar de Zúñiga

Karel Brožek as David Lippach

Milan Klacek as Filip Lang z Langenfelsu

Yvetta Kornová as Dorotka

Věra Tichánková as

Ladislav Křiváček as Seppl

Zdeněk Srstka as

Václav Kaňkovský as

Zita Furková as

Stanislav Hájek as

Josef Žluťák Hrubý as

Václav Kotva as

Vlado Černý as

Kateřina Urbancová as

Stanislava Bartošová as

Miloš Pietor as

František Kovár as

Peter Debnár as Matouš Děpolt Popel z Lobkovic

Jiří Prýmek as Jan Daniel Kapr z Kaprštejna

Karel Fořt as Announcer

Miloš Vavruška as Kristián I. Anhaltský

Anna Maľová as Bohunka

Bohuslav Ličman as Sabinus

František Kubíček as Old Fisher

Jožka Stoklasa as Tobias

Peter Bzdúch as Zoltán

Petr Drozda as

Jiří Adamíra as Narrator (voice)

Gustav Opočenský as Fels (voice)

Ladislav Frej as Johannes Kepler (voice)

Vladimír Ráž as Bohuslav z Michalovic (voice)

Daniela Bartáková as Beata (voice)

Steva Maršálek as Kašpar Kaplíř ze Sulevic (voice)

Vladimír Salač as Priest (voice)

Radan Rusev as Seppl (voice)

Jiří Zavřel as Matouš Děpolt Popel z Lobkovic (voice)

Jiří Havel as Jan Daniel Kapr z Kaprštejna (voice)

Ladislav Krečmer as Announcer (voice)

Mirko Musil as Old Fisher (voice)