Editing 2622: Angular Diameter Turnaround

{{comic
| number    = 2622
| date      = May 20, 2022
| title     = Angular Diameter Turnaround
| image     = angular_diameter_turnaround.png
| titletext = Thank you to Katie Mack for teaching me about this effect, and to Janelle Shane for describing redshifts as 'like galaxies sinking into a pool of dilute blood,' which is how I'll see them from now on.
}}

==Explanation==
{{incomplete|Created by a Galaxy-branded phone- Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic references multiple physics and maths concepts, including {{w|Angular diameter}}, {{w|Angular diameter distance}}, {{w|Redshift}}, and {{w|phones|mobile phones}}, although mobile phones are not a core science at this time{{Citation needed}}.

The comic shows the galaxies of the universe as mobile phones, pairing the age we see them at from earth, the degree they are redshifted, and how much of the sky they take up, known as their angular diameter. The mobile phones that are closer and older have depleted batteries, whereas the batteries are full for those phones from which the light is still only beginning to reach us. This is how galaxies appear in the sky, if they were phones that had batteries lasting billions of years, light reaching us from deeper into the past as it comes from objects that are farther away.

An important takeaway from this comic is that the events that occurred at the very start of our universe are etched in our sky ''as if they are still happening now'', in a detailed faint timeline, that we are still learning more and more from.

Randall's intent appears to be to highlight how just a few very distant galaxies occupy incredibly large proportions of the sky, and are seen as they were at a very young age. Mobile phones have this similarity, of massive presence, relatively early stages of new technology, and bringing information from far away.

The large galaxies can be seen dark red in the background, as if the unimaginably ancient child galactic bodies are looming forebodingly behind everything else.

This physical concept has a lot of juxtaposition of things that usually contradict, and Randall has put energy into attempting to highlight that.

Katie Mack tweet: https://twitter.com/AstroKatie/status/1516548836709343238

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

{{comic discussion}}
[[Category:Astronomy]]
[[Category:Math]]
[[Category:Physics]]
[[Category:Smartphones]]
[[Category:Comics with color]]
[[Category:Comics featuring real people]] <!-- title text -->
[[Category:Puns]] <!-- is there a "galaxy" / Samsung Galaxy pun here? -->