k A spectacular aurora borealis display Aurora borealis display with Moon, Jupiter centre right, Mars centre Saturn at bottom left. Aurorae are caused by the interaction between charged particles coming from the Sun and molecules of gases in the upper atmosphere about 100km. A stream of charged particles, known as the solar wind, flows continuously from the Suns corona towards interplanetary space at speeds of 400500 kms. These particles do not reach the Earths atmosphere due to the shielding effect of the Earths magnetic field. However, violent solar activities such as solar flares emit highly energetic particles which penetrate this shield ionise molecules in the atmosphere. Stock Photo - Afloimages
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A spectacular aurora borealis display Aurora borealis display with Moon, Jupiter  centre right , Mars  centre    Saturn at bottom left. Aurorae are caused by the interaction between charged particles coming from the Sun   and molecules of gases in the upper atmosphere  about 100km . A stream of charged particles, known as the solar wind, flows continuously from the Sun s corona towards interplanetary space at speeds of 400 500 km s. These particles do not reach the Earth s atmosphere due to the shielding effect of the Earth s magnetic field. However, violent solar activities such as solar flares emit highly energetic particles which penetrate this shield   ionise molecules in the atmosphere.
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A spectacular aurora borealis display

Aurora borealis display with Moon, Jupiter (centre right), Mars (centre) & Saturn at bottom left. Aurorae are caused by the interaction between charged particles coming from the Sun & and molecules of gases in the upper atmosphere (about 100km). A stream of charged particles, known as the solar wind, flows continuously from the Sun's corona towards interplanetary space at speeds of 400-500 km/s. These particles do not reach the Earth's atmosphere due to the shielding effect of the Earth's magnetic field. However, violent solar activities such as solar flares emit highly energetic particles which penetrate this shield & ionise molecules in the atmosphere.

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