Update, July 20, 2018: Archaeologists appointed by Egypt's Ministry of Antiquities have opened the sealed black granite sarcophagus that has had the internet abuzz since news of its discovery was ...

Success! Your account was created and you’re signed in. Please visit My Account to verify and manage your account. An account was already registered with this email. Please check your inbox for an ...

According to the Ptolemaic model, the Earth is at the center of the universe, with the rest of the universe orbiting around it. According to the heliocentric model, the sun is at the center of the ...

Galileo Galilei (1564-1642): Telescopic observations provide "nail in the coffin" for the Ptolemaic system. Experimental treatment of physics.

There was a time when most educated people knew that the Earth was the center of the universe. There was a sophisticated “Geocentric” model, known as the “Ptolemaic system”, that predicted to very ...