Newton proved his idea by measuring how much gravity force would be needed to keep the moon orbiting the Earth.

VOA: special.2011.06.01

Newton used his great skill in mathematics to form a better understanding of the world and the universe.

VOA: special.2011.06.01

The leading English poet of Newton's time, Alexander Pope,honored the scientist with these words: "Nature and nature's laws lay hid in night.

VOA: special.2011.06.01

Newton's reflecting telescope produced much clearer pictures than the old kind of telescope.

VOA: special.2011.06.01

Isaac Newton built on the ideas of these two scientists and others.

VOA: special.2011.06.01

Newton immediately gave Halley the answer: an egg-shaped path called an ellipse.

VOA: special.2011.06.01

"I just think it's really important to get kids excited about science at an early age, because they might be the next Albert Einstein or Isaac Newton,or America's top young scientist.

VOA: special.2009.10.15

Space shuttle worker Alan Newton expects to lose his job when the shuttle program ends this year.

VOA: standard.2010.03.18

Other headline acts have included British band Coldplay and Australian pop sweetheart Kylie Minogue as well as Barry Gibb from the Bee Gees and Olivia Newton-John.

VOA: standard.2009.03.14