MATERIAL

BRONZE

$1,995 all nine plaques

Best used forParks, campuses, and permanent public installations

Raised cast lettering

Heaviest of the three

Lifetime outdoors

DescriptionSand-cast and darker in tone. Grows a green patina over decades, so it reads as monument rather than signage.

BRASS

$1,995 all nine plaques

Best used forStreets, trails, and everyday outdoor walks

Engraved and ink-filled

Finest detail of the three

Lifetime outdoors

DescriptionThe standard plaque. Deep-engraved and ink-filled, bright enough to catch low sun and read at a glance from the path.

ACRYLIC

$1,000 all nine plaques

Best used forHallways, classrooms, and indoor or temporary routes

Reverse-engraved, paint-filled

Lightest to mount

Indoor or short-term use

DescriptionClear cast panel with the engraving on the reverse face. The lightest and least costly option, best for indoor and temporary routes.

Choose a material

CALCULATE

Pick any two bodies and tell us how far apart they will stand on your site.

Scale calculator

Site measurement

From To Distance apart In Plaque distance Plaque diameter

Scale

YOUR PLACE

Earth

Scaled Distance30.9 ft

Scaled Diameter0.801 mm

Light Travel Time8:19

Local Solar System

Your Earth plaque, engraved at 1 : 15,908,689,655

Your plaques

These are the exact figures engraved on your plaques. Adjust anything above and the whole set recomputes.

Body

From the sun

Walk from last

Diameter

Light time

How the math works

Every figure above comes from one number: the scale factor. Divide the distance you measured on your site by the real distance between your two chosen bodies¹ and that ratio is the factor. Multiplying anything real by it lands it in your model: each plaque's distance is the body's mean distance from the Sun times the factor, and each diameter is the body's true diameter times the same factor.
Light delay is the one figure that never scales. It is the body's real distance from the Sun divided by the speed of light², the actual time sunlight takes to arrive, whether your model spans a hallway or a mile.

DETAILS

Who this order is for, and where it is going to live. The shipping address is collected by Stripe at payment, so it is only entered once.

REVIEW

One last look at the whole system before the engraving starts.

Your order

Plaques

Nine plaques in brass

Scale

Site measurement

Earth plaque

Total

Ordering is closed while the first plaques are in production. Continue to see your plaque engraved with your figures, and send them to us to hold.

Review your set