On Jan. 31, 1958, Explorer 1 became the first satellite launched by the United States. Its primary science instrument, a ...
Earth, sun, moon: three objects in space whose interactions have a pretty big impact on our lives. Earth orbits the sun once a year, and it rotates on its axis about once a day (depending on your ...
When the Sun slips below the horizon and night begins, something unexpected appears high above our planet. Space scientists have discovered a strange and faint form of natural radiation that emerges ...
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