Main Page

Welcome to the explain xkcd wiki!
We have an explanation for all 2 xkcd comics, and only 71 (2%) are incomplete. Help us finish them!

Latest comic

Go to this comic explanation

Satellite Pollution

|< < Prev #3225 (March 27, 2026)

Title text: We're working to make sure the images are as up-to-date and accurate as possible, with a minimum number of sponsored galaxies.

|< < Prev Random Explanation

Explanation

A common concern with new satellite constellations like Starlink is that the fact that they rely on large numbers, they make ground-based astronomy more difficult by adding more noise and possibly obscuring targets.

A more recent concern is the "collapse" of Google Image Search, where trying to find a real picture of a historical event or scientific phenomenon, will now produce an unwieldly amount of results produced by generative AI.

This comic satirizes the two by talking about a hypothetical satellite company that launches *deliberately* inaccurate starmaps to be overlaid across the night sky. This would not only obscure a fair amount of stars from view, but also show stars that don't actually exist in the night sky, thus providing confusion for astronomers, seeing stars not on their starmaps, & making them look unreliable. Why anyone would do this is unknown, with its only purpose to confuse & mess with people. However, it could be just the doings of a very certain someone...

Of course, such a plan would have many problems in implementing, such as the pure size & strength needed for the banner to survive in space, & be large enough to be noticed by casual observers. Also, the banner would need to have its own light source, powerful enough to be seen from earth. Depending on the distance the banner is from the earth, it would be easy to make lights capable of being visible from our planet. See what if [|laser pointer]

The title text takes the concept further, implying that the company is somehow offering sponsorship to certain galaxies, despite galaxies not being known for being sentient, or able to provide a sponsorship. It is unclear how exactly these sponsorships are being done, possibly doing banners to advertise certain galaxies, though what for is unknown. Possibly to encourage people to visit the various sponsored galaxies, although many of them would be incredibly far away, & unreachable by current space travel.

Transcript

[White Hat and Ponytail are standing on the left, Cueball is on the right, in front of a poster on the wall. The poster has a portion of the Earth at the bottom, with outer space above it. The space scene has lots of stars, along with a few nebulae and galaxies. Part of the space scene is enclosed in a quadrilateral (apparently a rectangle skewed by perspective) which is attached at the middle of its left side to a much smaller object.]

Ponytail: Aren't you worried these will be disruptive for ground-based astronomy?

Cueball: No, why?

[Caption below comic:]

My new company is being criticized for our satellites that deploy 100-mile-wide banners painted with inaccurate pictures of the night sky.

Is this out of date? .

New here?

Last 7 days (Top 10)

Rank Score Pages Changes Username 1 22 18 22 TheusafBOT 2 15 6 27 DollarStoreBa'al 3 15 8 20 GSLikesCats307 4 13 13 13 Victoria 5 11 8 11 Maxwell Jackson 6 9 5 10 1234231587678 7 7 3 8 Barry Margolin 8 6 3 6 WikipedianPolitician 9 6 2 6 DKMell 10 5 3 4 Aprilfoolsupdate!

Lots of people contribute to make this wiki a success. Many of the recent contributors, listed above, have just joined. You can do it too! Create your account here.

You can read a brief introduction about this wiki at explain xkcd. Feel free to sign up for an account and contribute to the wiki! We need explanations for comics, characters, themes, memes and everything in between. If it is referenced in an xkcd web comic, it should be here.

• If you're new to wikis like this, take a look at these help pages describing how to navigate the wiki, and how to edit pages.

• Discussion about various parts of the wiki is going on at Explain XKCD:Community portal. Share your 2¢!

• List of all comics contains a table of most recent xkcd comics and links to the rest, and the corresponding explanations. There are incomplete explanations listed here. Feel free to help out by expanding them!

• If you see that a new comic hasn't been explained yet, you can create it: Here's how.

• We sell advertising space to pay for our server costs. To learn more, go here.

Rules

Don't be a jerk. There are a lot of comics that don't have set in stone explanations; feel free to put multiple interpretations in the wiki page for each comic.

If you want to talk about a specific comic, use its discussion page.

Please only submit material directly related to —and helping everyone better understand— xkcd... and of course only submit material that can legally be posted (and freely edited). Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.

If you need assistance from an admin, post a message to the Admin requests board.