Built by Bon Voyage team

We build next- level space apps

Bringing space to life through creative solutions and immersive web experiences.

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Earth rising above the grey lunar horizon, photographed by the Apollo 8 crewNASA · Apollo 8

We build next-level space apps

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Watch Demo

How it works

From NASA data to a go/no-go answer in seconds.

  1. Step 01

    NASA data

    Sun and Earth positions from JPL’s SPICE ephemeris for every hour from 2026 to 2030, plus lunar terrain from LRO.

    • SPICE ephemeris
    • LRO terrain
    • 139 sites
  2. Step 02

    Terrain horizon scan

    About 20,000 line traces across real terrain build each site’s 360° skyline.

    • 2 m
    • 5 m
    • 10 m
    • 20 m masts
  3. Step 03

    Sky geometry

    The Sun and Earth are placed in the site’s sky and checked against that skyline.

    • Partial sunrises
    • Libration
    • Eclipses
  4. Step 04

    Answers

    Sunlight, solar power, time to sunset and Earthset, and communication windows.

    • DSN coverage
    • Battery survival
    • Site comparison

Why we’re different

NASA’s tools give you the data. MOONbound turns it into a go/no-go answer for a landing site.

Other tools

  • Quickmap and Moon Trek map the terrain well, but don’t show when the Sun and Earth clear the horizon.
  • Horizons gives exact Sun and Earth positions as tables. You build the skyline yourself.
  • Power and communication answers mean stitching several tools together.
  • A new site or date means doing the work again.

Our Lunar Navigator

  • NASA SPICE positions and real LRO terrain in one tool, for 139 curated sites.
  • A true 360° skyline, scanned at four mast heights (2–20 m).
  • Sunlight, time to sunset and Earthset, and Earth-link windows in seconds.
  • Compare sites side by side. Change date or battery without a rescan.

Landing on the Moon

Six Apollo crews walked on the Moon between 1969 and 1972, and robotic landers from several countries have followed. Where a lander touches down decides how much sunlight it gets and whether it can talk to Earth.

one lunar day: about two weeks of light, then two of night
29.5 days
one-way radio delay between the Moon and Earth
1.3 s
tilt of the Moon’s axis, which keeps the Sun low at the poles
1.5°
Explore lunar landings
Astronaut Buzz Aldrin standing on the lunar surface beside the Apollo 11 lander legNASA · Apollo 11

We build next-level space apps

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