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An aurora [a] (pl. aurorae or auroras), [b] also commonly known as the northern lights (aurora borealis) or southern lights (aurora australis), [c] is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of brilliant lights that appear as curtains ...
The best aurora is usually within an hour or two of midnight (between 10 p.m. and 2 a.m. local time). These hours expand towards evening and morning as the level of geomagnetic activity increases.
A simple example of this is being able to see farther in heavy rain than in heavy fog. This process of reflection/absorption is what causes the range of cloud color from white to black. [19] Other colors occur naturally in clouds. Bluish-grey is the result of light scattering within the cloud.
This radiation causes the various ionospheric layers as well as a temperature increase at these heights (Figure 1). While the solar visible light (380 to 780 nm) is nearly constant with the variability of not more than about 0.1% of the solar constant , [ 6 ] the solar XUV radiation is highly variable in time and space.
What causes aurora borealis? The northern lights were visible over Warren Wilson College in Swannanoa, North Carolina, on May 10, 2024, as captured in this photo by Jen Blake Fraser.
A rare southern display of the aurora borealis or 'northern lights' colors the sky over a farm field just north of Stedman, North Carolina on the evening of Friday, May 10, 2024. The bright object ...
Structures within a surface cause light to be reflected back, but in the case of pearlescence some or most of the light is white, giving the object a pearl-like luster. [16] Artificial pigments and paints showing an iridescent effect are often described as pearlescent, for example when used for car paints .
What causes aurora borealis? The northern lights were visible over Warren Wilson College on May 10, 2024, as captured in this photo by Jen Blake Fraser. For more: jenniferblakefraser.com and ...