Editing 2227: Transit of Mercury

{{comic
| number    = 2227
| date      = November 11, 2019
| title     = Transit of Mercury
| image     = transit_of_mercury.png
| titletext = For some reason the water in my pool is green and there's a weird film on the surface #nofilter
}}

==Explanation==
{{incomplete|Created by MY TELESCOPE'S IMAGING SENSOR. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}

This comic is in reference to [https://www.theverge.com/2019/11/11/20958727/mercury-transit-sun-planet-nasa-astronomy the transit of the planet Mercury across the Sun] on November 11, 2019 (the date of the publication of this comic), which appeared from Earth as a small black dot moving against the background of the Sun. [[Randall]] has made comics about solar transits before, albeit about the transit of the International Space Station, in [[1828: ISS Solar Transit]] and [[1830: ISS Solar Transit 2]]. Viewing a solar transit requires a {{w|Astronomical filter|special lens filter}} to prevent the intense light from the Sun from burning out a telescope's imaging sensor.

The {{w|hashtag}} #nofilter is typically used on photo sharing sites, especially Instagram, to humblebrag about having encountered situations so photogenic that no further image enhancement ("{{w|Photographic filter|filter}}") is required to prepare them for general advertisement. In this comic, the hashtag is instead used to cap off an image about the predicament of the poster, where the lack of a proper astronomic filter has led to damage of personal property. The image shown on the comic is quite bright and {{w|Clipping (photography)|blown out}}, and though the poster did manage to get a picture of Mercury, the sun's bright light permanently damaged their telescope.

The title text refers to a still different meaning of the word "filter"; it imagines a swimming pool growing {{w|Algae|green scum}} in the absence of a {{w|Swimming_pool_sanitation#Private_pool_filtration|water filter}}, as opposed to a photographic or astronomic filter.

"No filter" may have [https://www.urbandictionary.com/define.php?term=No%20Filter also been used] here to refer to someone who makes, or posts, tactlessly candid comments. While often this means comments that reflect the individual's actual views but are potentially offensive or socially unacceptable, it could also refer to someone who posts every detail of their lives, such as what is growing in their swimming pool (as is shown in the title text). Multiple layers of meaning makes this pretty clever word play.

==Transcript==
:[Panel showing the sun partially obscured by clouds with faded gray blue sky around the sun, mainly upper right, as there are clouds in the lower left part. The image is very bright and blown out at the bottom left, obscuring most of the surface detail of the sun.  A small black dot is visible in the upper-right part of the sun's image.]

:[Caption below panel, with a yellow unhappy smiley before the hash tag:] 
:This photo of the transit of Mercury fried my telescope's imaging sensor 🙁 #NoFilter

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Astronomy]]