Before revision: Examples include Hubble's law, which was derived by Georges Lemaître two years before Edwin Hubble , the Pythagorean theorem, which was known to Babylonian mathematicians before Pythagoras , and Halley's Comet, which was observed by astronomers since at least 240 BC (although its official designation is due to the first ever mathematical prediction of such astronomical phenomenon in the sky, not to its discovery).
After revision: Examples include Hubble's law; which was derived by Georges Lemaître two years before Edwin Hubble ; the Pythagorean theorem, which was known to Babylonian mathematicians before Pythagoras , and Halley's Comet, which was observed by astronomers since at least 240 BC (although its official designation is due to the first ever mathematical prediction of such astronomical phenomenon in the sky, not to its discovery).