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Satellite photograph of a mesa in the Cydonia region of Mars, often called the "Face on Mars" and cited as evidence of extraterrestrial habitation. Pareidolia (/ ˌ p ær ɪ ˈ d oʊ l i ə, ˌ p ɛər-/; [1] also US: / ˌ p ɛər aɪ-/) [2] is the tendency for perception to impose a meaningful interpretation on a nebulous stimulus, usually visual, so that one detects an object, pattern, or ...
Visual snow syndrome (VSS) is an uncommon neurological condition in which the primary symptom is that affected individuals see persistent flickering white, black, transparent, or colored dots across the whole visual field. [7] [4] Other common symptoms are palinopsia, enhanced entoptic phenomena, photophobia, and tension headaches.
The airborne object you've seen in the sky, whether drone or not, falls into one of six categories, according to reporting by WTOP News: Astronomical, aeronautical, meteorological, wildlife ...
The only way to piece together all the pictures taken of the ground from lower orbits so that all the surface features line up seamlessly and without distortion is to put them on an approximately spherical surface. Astronauts in low Earth orbit can personally see the curvature of the planet, and travel all the way around several times a day ...
NASA has published an online post sharing details of a bright sky event over the southeastern part of the United States in the early hours of June 29th. The agency noted, "Based on the data we ...
At approximately 10:00 pm that same evening, a large number of people in the Phoenix area reported seeing "a row of brilliant lights hovering in the sky, or slowly falling". A number of photographs and videos were taken, prompting author Robert Sheaffer to describe it as "perhaps the most widely witnessed UFO event in history". [5]
Here's a breakdown of how and why it all happens. But the science behind a blue sky isn't that easy. For starters, it involves something called the Rayleigh effect, or Rayleigh scattering.
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.