Paraules clau: anells de Saturn, Christiaan Huygens, Copèrnic, Isaac Newton, James Clerk Maxwell, Jean Domenico Cassini, Saturn, Sol, William Herschel
Paraules clau: Albert Einstein, Isaac Newton, llum, supernova, teoria de la relativitat
Paraules clau: Copèrnic, Edmund Halley, espectrografia, Galileu, Isaac Newton, Kepler, telescopi
Paraules clau: Albert Einstein, Christiaan Huygens, Isaac Newton, James Clerk Maxwell, llum
Paraules clau: Galileu, Isaac Newton, telescopi, William Herschel