Who discovered the four largest moons of Jupiter?
Italian scientist Galileo Galilei discovered Jupiter's four largest moons in 1610 using a telescope he improved himself.
Galileo facts and facts about galileos, from the Random Facts shelf.
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Italian scientist Galileo Galilei discovered Jupiter's four largest moons in 1610 using a telescope he improved himself.
In 1610, Galileo Galilei used his improved telescope to discover four of Jupiter's moons, which supported the idea that not everything orbits Earth.
Galileo's telescope wasn't strong enough to show Saturn's rings clearly, so he thought the planet had "ears" or two large moons on either side.
As a young man, Galileo noticed that a swinging chandelier in Pisa Cathedral took the same amount of time for each swing, which led to his study of pendulums.
The famous story of Galileo dropping balls from the Leaning Tower of Pisa probably never happened.
In 1633, Galileo was put on trial by the Catholic Church for supporting the idea that Earth orbits the Sun, and he spent the rest of his life under house arrest.
In 1992, Pope John Paul II formally acknowledged that the Church had been wrong in its treatment of Galileo.
Galileo's middle finger is displayed in a museum in Florence.
Galileo observed that Venus has phases like the Moon, evidence that it orbits the Sun.
NASA's Galileo spacecraft studied Jupiter from 1995 to 2003.
Galileo went blind late in life.
Galileo's daughter Maria Celeste was a nun who exchanged letters with him.
Galileo was born in 1564, the same year as William Shakespeare.
Stephen Hawking was born on the anniversary of Galileo's death and died on Albert Einstein's birthday.
Galileo saw Neptune in 1612 but thought it was a star.