⚡PDF ❤ Kristian Birkeland: The First Space Scientist (Astrophysics and Space Science
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/PDF Kristian Birkeland: The First Space Scientist (Astrophysics and Space Science Library, 325) | At the beginning of the 20th century, Kristian Birkeland (1867-1917), a Norwegian scientist of insatiable curiosity, addressed questions that had vexed European scientists for centuries. Why do the northern lights appear overhead when the earth’s magnetic field is