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Home Science ‘Galileo wasn’t right’ Philosopher unravels 400-year-old mystery that sparked Church fury

‘Galileo wasn’t right’ Philosopher unravels 400-year-old mystery that sparked Church fury

Galileo Galilei was an Italian astronomer, physicist and engineer, sometimes described as the “polymath from Pisa” or the “father of modern physics”. His contributions to astronomy include observations in 1610 at Jupiter, Venus Saturn and the Moon and paved the way for interpretations still used today. But Galileo’s championing of heliocentrism – the astronomical model in which the Earth and planets revolve around the Sun at the centre of the Solar System – was met with opposition from within the Catholic Church and from some astronomers. 

The matter was investigated by the Roman Inquisition in 1615, which concluded that heliocentrism was “foolish and absurd in philosophy, and formally heretical since it explicitly contradicts in many places the sense of Holy Scripture”.

And philosopher Dr Toby Friend details during the BBC’s upcoming ‘Sky at Night’ magazine issue how the ‘Galileo Affair’ unfolded.

He writes: “In 1616 Galileo was instructed by Cardinal Bellarmine ‘to abandon completely the opinion that the Sun stands still at the centre of the world and the Earth moves’. 

“The Cardinal had pointed out once before that it is one thing to show that by merely supposing Earth orbits the Sun one can calculate accurately where and when other heavenly bodies will be in the night sky, but it is another thing entirely to make the sacrilegious declaration that ‘in truth, the Sun is at the centre and the Earth in heaven’. 

“His concern was that Galileo was promoting the heliocentric model as something to be believed rather than, as he put it, a mere contrivance used to ‘save the appearances’.

“Surely we want to say that Galileo was justified in believing that heliocentrism was true.

“Today we’re constantly claiming to learn facts about the world on the basis of telescopic observation – where stars appear near the Sun during eclipses confirms that space is curved, the detection of the Cosmic Microwave Background confirms that the universe has expanded, the observation of galaxies’ rotation confirms the existence of dark matter, and so on.”

But the University of Bristol scientist explains how the mystery unravelled.

He adds: “Most modern scientists tend to be ‘realists’. 

READ MORE: Stephen Hawking’s 50-year-old puzzle tipped to be solved with black hole discovery

Dr Friend explains the latest theory that shows Galileo was not 100 percent right.

He continues: “The Sun isn’t exactly at the gravitational centre of the Solar System.

“And Galileo refused to believe the planets orbit in ellipses. 

“More recently, we’ve learned that the Solar System isn’t even at our Galaxy’s centre. 

“These developments should cast into doubt the idea that even today’s physical theories are perfectly true.”

You can read the latest release of the BBC’s ‘Sky at Night’ by subscribing here.

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