The Mechanics of Earth's Spin Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 ...

How many times have you said, “I wish the days were longer”? Well, NASA scientists say the construction of China’s Three ...

Earth's axial precession is a gyroscopic wobble, analogous to a spinning top, causing its axis of rotation to trace a cone over time. The primary cause of Earth's precession is the gravitational ...

Humans may have altered the Earth’s rotation significantly between 1993 and 2010 alone by pumping large quantities of water out of the ground and moving it elsewhere. Alarming levels of groundwater ...

A neutron star is the extremely compressed leftover core of a star that began life with between 10 and 30 times the Sun’s mass. Moving charges do generate magnetic fields, as you suggest; however, the ...

A boy looks at a water pump on a street in New York City. Between 1993 and 2010, researchers estimate that humans have pumped over two trillion tons of water out of the ground. Bettmann / Contributor ...

In a “normal” electrocardiogram (ECG), the transition of the QRS axis in the precordial leads occurs between leads V 3 and V 4 (i.e., there is a dominant S in V 3 and a dominant R in V 4).