A team of astronomers has used asteroseismology, or the study of stellar oscillations, to accurately measure the distance of stars from the Earth. Their research examined thousands of stars and ...
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IRST detected targets at 50 nautical miles – then lost them in clouds
Infrared Search and Track (IRST) systems allow fighters to detect targets passively, without emitting signals—making them nearly invisible to enemies. In ideal conditions, they can detect aircraft at ...
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