'Optical clock' yields split-second success

Physicists said Tuesday that a so-called optical lattice clock, touted by some as the time-measuring device of the future, had passed a key accuracy test.

US army seeks new technology to replace GPS

The US army is working to limit its dependence on GPS by developing the next generation of navigation technology, including a tiny autonomous chip, the director of the Pentagon's research agency said Wednesday.

China launches rival GPS satellite system (Update)

China has launched commercial and public services across the Asia-Pacific region on its domestic satellite navigation network built to rival the US global positioning system.

Soyuz rocket launches two Galileo satellites

A Soyuz rocket launched two Galileo satellites into orbit on Friday, marking a crucial step for Europe's planned navigation system, operator Arianespace announced.

China's satellite navigation system live

China's home-grown satellite navigation system launched a limited positioning service Tuesday, the official Xinhua news agency said, as the country seeks to break its dependence on foreign technology.

New generation GPS satellite starts tests in Colo.

A $5.5 billion upgrade to the Global Positioning System moved a step closer to launch this week when a prototype arrived at a Lockheed Martin complex in Colorado to begin months of tests.

Moon's shadow, like a ship, creates waves

During a solar eclipse, the Moon's passage overhead blocks out the majority of the Sun's light and casts a wide swath of the Earth into darkness. The land under the Moon's shadow receives less incoming energy than the surrounding ...

Google Maps taking armchair explorers to the Amazon

Two women washed clothes in the dark water of the Rio Negro as a boat glided past with a camera-laden Google tricycle strapped to the roof, destined to give the world a window into the Amazon rain forest.

page 2 from 11