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Photopsias is defined as an effect on the vision that causes appearances of anomalies in the vision. Photopsias usually appear as: flickering lights; shimmering lights; floating shapes; moving dots; snow or static; Photopsias are not generally a condition on their own, but a symptom of another condition.
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 FWHM of the seeing disc (or just "seeing") is usually measured in arcseconds, abbreviated with the symbol (″). A 1.0″ seeing is a good one for average astronomical sites. The seeing of an urban environment is usually much worse. Good seeing nights tend to be clear, cold nights without wind gusts.
Here's everything to know about the northern lights and how to see them now that the sun has reached its solar maximum: The northern lights explode up into the sky over Massachusetts as a group ...
People across the country, including Indiana, were able to see the northern lights Thursday evening, with some viewers capturing images of auroras and posting them to social media. Here's a little ...
Millions were wowed last week when the Northern Lights, or Aurora Borealis, made a rare appearance as far south as the Gulf Coast.. Photos circulated on social media and elsewhere of the pink and ...
States best positioned within the aurora viewing line include: Alaska. Washington. Idaho. Montana. North Dakota. Minnesota. Michigan. Wisconsin. The auroras may also be "highly active" in parts of ...
Visual snow is a phenomenon where a person perceives visual disturbances, such as fine graininess or "static," in their field of vision. This can occur in low-light conditions, in the dark, or when the visual system amplifies light perception.