A becuase the others would not make any sense
The correct answer is - the heliocentric system.
By using the telescope, Galileo Galilei managed to observe the movements of the Sun, Moon, the planets in the Solar System, and he was mapping their movements on the sky, and also he was comparing their movements to the Earth's position. With this, he managed to notice that insted of the popular belief that the Sun, Moon, and the other planets are moving around the Earth, that it is actually the opposite of it, and that the Sun was the center of our Solar System, and that all the planets and moons were orbiting around it, while the only object that hold its position as it was initially thought was the Moon, because it orbits around our planet. So Galileo contributed to the theory of the heliocentric system.
Answer: Province Day
Explanation: Commonly known holiday in Ecuador. Next time instead of saying the question in spanish use "Spanishdict.com" to translate to English. People wouldn't understand that you are asking what they celebrate on the 12th of February in Ecuador.
(La próxima vez, diga la pregunta en inglés)
