Editing Cosmic ray visual phenomena (section)

==Types==
Some LF were reported to be clearly visible, while others were not. They manifested in different colors and shapes. How often each type was seen varied across astronauts' experiences, as evident in a survey of 59 astronauts.<ref name="Fuglesand2006" />

===Colors===
On Lunar missions, astronauts almost always reported that the flashes were white, with one exception where the astronaut observed "blue with a white cast, like a blue diamond." On other space missions, astronauts reported seeing other colors such as yellow and pale green, though rarely.<ref name="Sannita2006">{{cite journal |title=Positive visual phenomena in space: A scientific case and a safety issue in space travel |journal=Vision Research |first1=Walter G. |last1=Sannita |first2=Livio |last2=Narici |first3=Piergiorgio |last3=Picozza |volume=46 |issue=14 |pages=2159–2165 |date=July 2006 |doi=10.1016/j.visres.2005.12.002 |pmid=16510166|s2cid=18240658 |doi-access= }}</ref> Others instead reported that the flashes were predominantly yellow, while others reported colors such as orange and red, in addition to the most common colors of white and blue.<ref name="Fuglesand2006" />

===Shapes===
The main shapes seen are "spots" (or "dots"), "stars" (or "supernovas"), "streaks" (or "stripes"), "blobs" (or "clouds") and "comets". These shapes were seen at varying frequencies across astronauts. On the Moon flights, astronauts reported seeing the "spots" and "stars" 66% of the time, "streaks" 25% of the time, and "clouds" 8% of the time.<ref name="Sannita2006" /> Astronauts who went on other missions reported mainly "elongated shapes".<ref name="Fuglesand2006" /> About 40% of those surveyed reported a "stripe" or "stripes" and about 20% reported a "comet" or "comets". 17% of the reports mentioned a "single dot" and only a handful mentioned "several dots", "blobs" and a "supernova".