Earth's in­vis­i­ble shield

Down to Earth - - SCIENCE -

THERE IS a mag­netic shield around Earth which blocks harm­ful elec­trons mov­ing around the planet at nearly the speed of light from en­ter­ing the at­mos­phere. Th­ese elec­trons are con­sid­ered a threat to as­tro­nauts and dam­age satel­lites. The in­vis­i­ble shield, lo­cated around 11,500 km above Earth, was dis­cov­ered in the Van Allen ra­di­a­tion belts, two dough­nut­shaped rings that con­tain high-en­ergy elec­trons and pro­tons. Na­ture, Novem­ber 27

Newspapers in English

Newspapers from India

© PressReader. All rights reserved.