What this is for, and what you're agreeing to.

Most terms of service are a wall of text most people don't read. Intent is important to us, though, so we'll start with what the project is actually trying to do. The legally binding part starts below it.

Last updated: 31 July 2026

Our intent

SolarSystem.city exists to make the size of the solar system physically true for the person walking it, and to encourage people to get outside and enjoy public spaces.

So the central promise of this project is simple: the scale is derived from real astronomy. If your city's sun object is ten feet across, then Neptune is miles away. The distance is the point. Everything else here — the cards, the AR, the routes — exists to serve that.

Some things that follow from that:

No accounts, no tracking, no advertising. Your walk is yours. We built the site so that the interesting data physically stays on your phone. See the privacy policy for the specifics.
One card, every city, forever. We're not going to obsolete your card to sell you another one. A card bought today is meant to keep working in cities that don't exist on the site yet.
The walks belong to the people who know the cities. Anyone can build one, and you don't need our permission or an account to walk it. We review public submissions for scale accuracy and landmark quality before publishing them.

None of the above is legally binding. It's what we're trying to do, so you can tell whether we're doing it, and hold us to it if we're not.

The terms

By using SolarSystem.city you agree to what follows. If you don't agree, please don't use the site. These terms are between you and Factorem LLC, a New York limited liability company doing business as Nerd-Sniped ("we", "us"), the operator of solarsystem.city.

Walking is the risk — please read this part

This site sends you outdoors, into a real city, to walk real distances, often while looking at a phone. That's the entire experience, and it carries real physical risk that a website cannot manage for you. You are responsible for your own safety at all times.

Look up. Don't cross roads, use stairs, or navigate traffic while looking at the screen or through the AR camera. The planet will still be there in ten seconds.
Obey the law. Traffic signals, crossings, trespass laws, park hours, and local rules all apply to you exactly as they normally do. Nothing on this site is permission to be anywhere.
Waypoints are coordinates, not endorsements. A planet pin means "the mathematics puts this planet here." It does not mean the location is safe, public, open, accessible, lit, staffed, or legal to enter. Some sit on private property or inside ticketed venues. Check before you go, and turn back if a stop looks unsafe — skipping a stop is built into the app for exactly this reason.
Judge the distance honestly. A true-scale walk to the outer planets can be many miles and several hours. Consider weather, heat, darkness, water, your fitness, and your phone's battery before starting. Use transit for the long legs.
Children must be supervised by an adult. This is not a children's app and routes are not designed as child-safe.
Don't rely on this as your only navigation. GPS drifts, compasses lie near metal, batteries die, and routes can direct you badly. Carry another way of getting home.

To the fullest extent permitted by law, you use this site and walk these routes at your own risk, and you assume the risks described above.

Community-built walks

Anyone can build a walk in the planner, save it to their device, or share it by link. Some are published on the site after review; many are not, and shared links are explicitly marked unofficial.

We do not inspect community routes for physical safety, accessibility, or legal access. Our review covers whether the astronomy is right and the landmarks make sense. An unofficial walk has had no review at all. Treat every route — ours included — with the judgement you'd apply to directions from a stranger who has never seen the street.

If you submit a walk, you confirm that:

You have the right to submit it, and it doesn't infringe anyone's rights.
It contains no personal information about other people, and nothing unlawful, hateful, or deliberately misleading.
You grant us a non-exclusive, worldwide, royalty-free license to publish, adapt, and distribute the walk as part of the site — including correcting landmarks, names, and descriptions. You keep ownership of what you made.
We may decline, edit, or remove any submission for any reason, and we're not obliged to publish anything.

Acceptable use

Don't use the site to break the law, and specifically don't:

Interfere with the site, its APIs, or its rate limits, or attempt to gain unauthorized access.
Scrape or bulk-extract site content beyond ordinary personal use.
Submit walks designed to lure people into danger, onto private property, or into places they shouldn't be.
Misrepresent an unofficial walk as an official one.

Cards, postcards, and purchases

Physical goods are sold through our Shopify storefront, and purchases are governed by that storefront's own terms, shipping timescales, and refund policy in addition to these terms. The cart on this site is Shopify's, and checkout happens on Shopify's own pages; Shopify processes your order and payment details under its own privacy terms — we never see your card details. Prices and availability shown here can be out of date, and the price and stock confirmed at checkout are the ones that govern. Nothing on this site is a guarantee of stock, price, or delivery date.

The site itself is free, and you never need a card to use it. A card is a physical scale reference and a convenience, not a license key.

Availability

This is a small independent project, not an enterprise service. The site is provided "as is" and "as available", with no promise of uptime, and features — including individual walks — may change or disappear. We aim to keep printed codes working, because they're printed and you can't re-print what's already in someone's pocket, but we can't guarantee it forever.

Intellectual property

The site's design, text, artwork, and card designs belong to us. Portions of the underlying source code are released under an open-source license — where that license applies, it governs, and it wins over this section for that code. Planetary imagery is derived from public-domain sources including NASA. Map data is © OpenStreetMap contributors, available under the Open Database License. Some place data is provided by Google and remains subject to Google's terms.

Disclaimers and limits

To the fullest extent permitted by law, we disclaim all warranties, express or implied, including fitness for a particular purpose and accuracy of the routes, distances, landmark information, and directions provided.

To the fullest extent permitted by law, we are not liable for any indirect, incidental, or consequential loss, or for personal injury, property damage, trespass, arrest, or loss arising from your use of the site or from walking any route found on it, except where that liability cannot be excluded by law. Where liability cannot be excluded, it is limited to the amount you paid us in the previous twelve months.

Nothing in these terms excludes liability for death or personal injury caused by negligence, fraud, or anything else that can't lawfully be excluded — and if you're a consumer, your statutory rights are unaffected by anything written here.

Changes and governing law

We may update these terms; the date at the top will change and material changes will be flagged on the site. These terms are governed by the laws of the State of New York, without regard to its conflict-of-laws rules, and you and we agree that any dispute will be brought in the state or federal courts located in Queens County, New York. None of that deprives you of the protection of the mandatory consumer law of the country or state where you live, or of the right to bring a claim in your local small-claims court.

Contact

Questions about these terms, or anything else: get in touch. If something on a walk is unsafe, wrong, or has changed on the ground, please tell us — that's the fastest way it gets fixed for the next person.