| 31. | Only the sounding balloons launching platform, the aurorae observation tower and multiple chimneys and antennae stuck out on the surface.
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| 32. | "' Fredrik Carl M�lertz St�rmer "'( 3 September 1874 13 August 1957 ) was a aurorae.
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| 33. | Adding to this understanding of the absence of solar cycles were observations of aurorae, which were absent at the same time.
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| 34. | Aurorae are natural light displays in the sky caused by the collision of energetic charged particles with atoms in the high altitude thermosphere.
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| 35. | In 1716, Edmund Halley suggested that aurorae are caused by " magnetic effluvia " moving along the Earth's magnetic field lines.
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| 36. | The riometer was developed in the mid 1950s by scientists at the University of Alaska who were researching the radio propagation effects of aurorae.
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| 37. | Particles that penetrate the ionosphere and collide with the atoms there give rise to the lights of the aurorae and also emit X-rays.
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| 38. | Material from the solar wind can'leak'into the magnetosphere, causing aurorae and also populating the Van Allen Belts with ionised material.
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| 39. | Aurorae were seen as far south as Hawaii, Mexico, Cuba and Italy & mdash; phenomena that are usually only visible in polar regions.
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| 40. | These cover observations of aurorae, comets, deep sky, the Moon, meteors, occultations, the planets, the Sun and variable stars.
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