THERE are in use to-day three principal systems -L of direction finding by which the apparent direction of arrival of a train of electromagnetic waves can be observed and, under suitable conditions, ...
ZME Science on MSN
A Giant Weak Spot in Earth’s Magnetic Field Is Spreading and Scientists Are Worried
A weak spot in Earth’s protective magnetic field is growing larger and exposing orbiting satellites and astronauts to more ...
Aurorae such as the southern lights, seen here over Antarctica, show the geomagnetic field in action. Some areas of the field, which shields Earth’s surface from charged solar particles, are stronger ...
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