Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

In the zero-gravity airplanes or vomit comet, why does stuff behave like there is no gravity when it is just falling? – Austin B., 11, Scranton, Pennsylvania I have flown many times in zero-gravity ...

Gravity is usually presented as the most familiar of nature’s forces, the quiet background pull that keeps feet on sidewalks and planets in orbit. A growing group of physicists is now treating that ...

Last week, the Japanese meteorological satellite Himawari-8 snapped a pretty cool image of Australia from space. The image shows an enormous gravity wave sweeping through the atmosphere off the ...

In the zero-gravity airplanes or vomit comet, why does stuff behave like there is no gravity when it is just falling? – Austin B., 11, Scranton, Pennsylvania I have flown many times in zero-gravity ...

Gravity is the attraction between two objects that have mass or energy, whether this is seen in dropping a rock from a bridge, a planet orbiting a star or the moon causing ocean tides. Gravity is ...

Hi, everyone, I'm Mwaksy. I'm Greg.Quick question, Greg. Yes. So, I know if I let drop this apple,it will fall because of gravity. Yes.Ooh! Good catch.But what exactly is gravity? Gravity is a force ...