Weirdly, spaceships have no direct way to gauge their own speed. Luckily, we can use some physics tricks to figure it out.

Shirts are full of curves—collars, cuffs, sleeves—but sewing machines operate in straight lines. Engineers opted to replace ...

In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used mathematical calculations to show this: If sufficient mass could be placed into an ...

How weather affects home runs in baseball, with wind, temperature, humidity, air pressure, and elevation shaping ball flight ...

Gravity has been tested extremely well inside the solar system. On cosmic scales, direct tests are harder. This study pushes ...

Submarines operate for weeks or months beneath the ocean surface, cut off from the satellite signals that guide nearly every ...

The jets do not move in a straight, obedient line. Around Cygnus X-1, a black hole and a massive supergiant star circle each ...

From fundamental research to orbital debris monitoring, the Oukaïmeden Observatory is undergoing a major technological ...

San Diego Padres closer Mason Miller passed a Los Angeles Dodgers flamethrower on the 2026 velocity leaderboard.

Gravity, as most people understand it, is the familiar force that pulls a falling apple toward Earth. But for astronomers and ...