About "An Astronaut's Solar System Walk"

A first-person walking tour. Every stop lands on a body you could really stand on: the Sun and the gas giants have no solid surface, so the Sun stop stays in a heat-shielded observation deck, and Jupiter, Saturn, Uranus and Neptune are visited from their moons (Europa, Enceladus, Miranda, Triton) with the giant planet hanging in the sky.

Controls: after landing the astronaut keeps walking forward; drag the view to look around and steer; press Enter to jump with the local gravity. Keyboard: hold S / ↓ to pause, A D / ← → turn, Q E look up/down, Enter or Space jump, N / P next / previous stop.

Honest labelling: scenes are brick-style illustrations; distances are compressed; sky objects use their true angular diameter (objects under 1.5° are enlarged to 1.5° for visibility); exoplanet surfaces are inferred from size, temperature and host star. Generic brick style, unaffiliated with any brick brand.

Sources

• NASA Solar System Exploration (planet and moon data)
• NASA/JPL Horizons (orbital data)
• NASA Exoplanet Archive (exoplanet parameters)
• ESA Gaia (stellar distances)
• Missions: Apollo, Venera, New Horizons, Cassini, Juno, Voyager 2, Hubble Space Telescope