The Mechanics of Earth's Spin Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars. Scientists call this ...

The Solar Impulse en route from Washington to New York. Solar Impulse is the first plane ever with the ability to use solar energy to fly both day and night without using fuel. Earlier this month, ...

Day and Night Solar was hit with a breach-of-contract lawsuit on July 14 in Illinois Circuit Court for Madison County over allegedly unpaid engineering services. The action, brought by Thompson Coburn ...